diff --git a/images/ubuntu/scripts/build/configure-dpkg.sh b/images/ubuntu/scripts/build/configure-dpkg.sh
index 7f9f19e2f6ab..28e00c381f58 100644
--- a/images/ubuntu/scripts/build/configure-dpkg.sh
+++ b/images/ubuntu/scripts/build/configure-dpkg.sh
@@ -14,7 +14,7 @@ source $HELPER_SCRIPTS/etc-environment.sh
 # automatic installs. If you are using this front-end, and require
 # non-default  answers  to questions, you will need to preseed the
 # debconf database
-setEtcEnvironmentVariable "DEBIAN_FRONTEND" "noninteractive"
+set_etc_environment_variable "DEBIAN_FRONTEND" "noninteractive"
 
 # dpkg can be instructed not to ask for confirmation
 # when replacing a configuration file (with the --force-confdef --force-confold options)
diff --git a/images/ubuntu/scripts/build/configure-environment.sh b/images/ubuntu/scripts/build/configure-environment.sh
index fe2a5d3d4a89..dbf93999d4ae 100644
--- a/images/ubuntu/scripts/build/configure-environment.sh
+++ b/images/ubuntu/scripts/build/configure-environment.sh
@@ -9,15 +9,15 @@ source $HELPER_SCRIPTS/os.sh
 source $HELPER_SCRIPTS/etc-environment.sh
 
 # Set ImageVersion and ImageOS env variables
-setEtcEnvironmentVariable "ImageVersion" "${IMAGE_VERSION}"
-setEtcEnvironmentVariable "ImageOS" "${IMAGE_OS}"
+set_etc_environment_variable "ImageVersion" "${IMAGE_VERSION}"
+set_etc_environment_variable "ImageOS" "${IMAGE_OS}"
 
 # Set the ACCEPT_EULA variable to Y value to confirm your acceptance of the End-User Licensing Agreement
-setEtcEnvironmentVariable "ACCEPT_EULA" "Y"
+set_etc_environment_variable "ACCEPT_EULA" "Y"
 
 # This directory is supposed to be created in $HOME and owned by user(https://github.com/actions/runner-images/issues/491)
 mkdir -p /etc/skel/.config/configstore
-setEtcEnvironmentVariable "XDG_CONFIG_HOME" '$HOME/.config'
+set_etc_environment_variable "XDG_CONFIG_HOME" '$HOME/.config'
 
 # Change waagent entries to use /mnt for swapfile
 sed -i 's/ResourceDisk.Format=n/ResourceDisk.Format=y/g' /etc/waagent.conf
@@ -30,7 +30,7 @@ sed -i 's/::1 ip6-localhost ip6-loopback/::1     localhost ip6-localhost ip6-loo
 # Prepare directory and env variable for toolcache
 AGENT_TOOLSDIRECTORY=/opt/hostedtoolcache
 mkdir $AGENT_TOOLSDIRECTORY
-setEtcEnvironmentVariable "AGENT_TOOLSDIRECTORY" "${AGENT_TOOLSDIRECTORY}"
+set_etc_environment_variable "AGENT_TOOLSDIRECTORY" "${AGENT_TOOLSDIRECTORY}"
 chmod -R 777 $AGENT_TOOLSDIRECTORY
 
 # https://www.elastic.co/guide/en/elasticsearch/reference/current/vm-max-map-count.html
@@ -62,6 +62,6 @@ fi
 
 # Disable to load providers
 # https://github.com/microsoft/azure-pipelines-agent/issues/3834
-if isUbuntu22; then
+if is_ubuntu22; then
     sed -i 's/openssl_conf = openssl_init/#openssl_conf = openssl_init/g' /etc/ssl/openssl.cnf
 fi
diff --git a/images/ubuntu/scripts/build/configure-snap.sh b/images/ubuntu/scripts/build/configure-snap.sh
index aa0de806494d..a08f3e4556b2 100644
--- a/images/ubuntu/scripts/build/configure-snap.sh
+++ b/images/ubuntu/scripts/build/configure-snap.sh
@@ -9,7 +9,7 @@ source $HELPER_SCRIPTS/etc-environment.sh
 # Update /etc/environment to include /snap/bin in PATH
 # because /etc/profile.d is ignored by `--norc` shell launch option
 
-prependEtcEnvironmentPath "/snap/bin"
+prepend_etc_environment_path "/snap/bin"
 
 # Put snapd auto refresh on hold
 # as it may generate too much traffic on Canonical's snap server
diff --git a/images/ubuntu/scripts/build/configure-system.sh b/images/ubuntu/scripts/build/configure-system.sh
index 997ab8583dfe..fcfe867c572e 100644
--- a/images/ubuntu/scripts/build/configure-system.sh
+++ b/images/ubuntu/scripts/build/configure-system.sh
@@ -20,7 +20,7 @@ chmod 755 $IMAGE_FOLDER
 ENVPATH=$(grep 'PATH=' /etc/environment | head -n 1 | sed -z 's/^PATH=*//')
 ENVPATH=${ENVPATH#"\""}
 ENVPATH=${ENVPATH%"\""}
-addEtcEnvironmentVariable "PATH" "${ENVPATH}"
+add_etc_environment_variable "PATH" "${ENVPATH}"
 echo "Updated /etc/environment: $(cat /etc/environment)"
 
 # Сlean yarn and npm cache
diff --git a/images/ubuntu/scripts/build/install-actions-cache.sh b/images/ubuntu/scripts/build/install-actions-cache.sh
index 3adfaa177843..e50b94c9431f 100644
--- a/images/ubuntu/scripts/build/install-actions-cache.sh
+++ b/images/ubuntu/scripts/build/install-actions-cache.sh
@@ -14,7 +14,7 @@ ACTION_ARCHIVE_CACHE_DIR=/opt/actionarchivecache
 mkdir -p $ACTION_ARCHIVE_CACHE_DIR
 chmod -R 777 $ACTION_ARCHIVE_CACHE_DIR
 echo "Setting up ACTIONS_RUNNER_ACTION_ARCHIVE_CACHE variable to ${ACTION_ARCHIVE_CACHE_DIR}"
-setEtcEnvironmentVariable "ACTIONS_RUNNER_ACTION_ARCHIVE_CACHE" "${ACTION_ARCHIVE_CACHE_DIR}"
+set_etc_environment_variable "ACTIONS_RUNNER_ACTION_ARCHIVE_CACHE" "${ACTION_ARCHIVE_CACHE_DIR}"
 
 # Download latest release from github.com/actions/action-versions and untar to /opt/actionarchivecache
 downloadUrl=$(resolve_github_release_asset_url "actions/action-versions" "endswith(\"action-versions.tar.gz\")" "latest")
diff --git a/images/ubuntu/scripts/build/install-aliyun-cli.sh b/images/ubuntu/scripts/build/install-aliyun-cli.sh
index fd9414606574..13d959d7abed 100644
--- a/images/ubuntu/scripts/build/install-aliyun-cli.sh
+++ b/images/ubuntu/scripts/build/install-aliyun-cli.sh
@@ -11,7 +11,7 @@ source $HELPER_SCRIPTS/install.sh
 
 # Install Alibaba Cloud CLI
 # Pin tool version on ubuntu20 due to issues with GLIBC_2.32 not available
-if isUbuntu20; then
+if is_ubuntu20; then
     toolset_version=$(get_toolset_value '.aliyunCli.version')
     download_url="https://github.com/aliyun/aliyun-cli/releases/download/v$toolset_version/aliyun-cli-linux-$toolset_version-amd64.tgz"
 else
@@ -22,7 +22,7 @@ fi
 archive_path=$(download_with_retry "$download_url")
 
 # Supply chain security - Alibaba Cloud CLI
-if isUbuntu20; then
+if is_ubuntu20; then
     external_hash=$(get_toolset_value '.aliyunCli.sha256')
 else
     external_hash=$(get_checksum_from_url "$hash_url" "aliyun-cli-linux.*amd64.tgz" "SHA256")
diff --git a/images/ubuntu/scripts/build/install-android-sdk.sh b/images/ubuntu/scripts/build/install-android-sdk.sh
index 772a4aa54366..43d228ea1b3f 100644
--- a/images/ubuntu/scripts/build/install-android-sdk.sh
+++ b/images/ubuntu/scripts/build/install-android-sdk.sh
@@ -36,10 +36,10 @@ get_full_ndk_version() {
 ANDROID_ROOT=/usr/local/lib/android
 ANDROID_SDK_ROOT=${ANDROID_ROOT}/sdk
 SDKMANAGER=${ANDROID_SDK_ROOT}/cmdline-tools/latest/bin/sdkmanager
-setEtcEnvironmentVariable "ANDROID_SDK_ROOT" "${ANDROID_SDK_ROOT}"
+set_etc_environment_variable "ANDROID_SDK_ROOT" "${ANDROID_SDK_ROOT}"
 
 # ANDROID_HOME is deprecated, but older versions of Gradle rely on it
-setEtcEnvironmentVariable "ANDROID_HOME" "${ANDROID_SDK_ROOT}"
+set_etc_environment_variable "ANDROID_HOME" "${ANDROID_SDK_ROOT}"
 
 # Create android sdk directory
 mkdir -p ${ANDROID_SDK_ROOT}
@@ -87,10 +87,10 @@ ndk_default_full_version=$(get_full_ndk_version $android_ndk_major_default)
 ndk_latest_full_version=$(get_full_ndk_version $android_ndk_major_latest)
 ANDROID_NDK=${ANDROID_SDK_ROOT}/ndk/${ndk_default_full_version}
 # ANDROID_NDK, ANDROID_NDK_HOME, and ANDROID_NDK_ROOT variables should be set as many customer builds depend on them https://github.com/actions/runner-images/issues/5879
-setEtcEnvironmentVariable "ANDROID_NDK" "${ANDROID_NDK}"
-setEtcEnvironmentVariable "ANDROID_NDK_HOME" "${ANDROID_NDK}"
-setEtcEnvironmentVariable "ANDROID_NDK_ROOT" "${ANDROID_NDK}"
-setEtcEnvironmentVariable "ANDROID_NDK_LATEST_HOME" "${ANDROID_SDK_ROOT}/ndk/${ndk_latest_full_version}"
+set_etc_environment_variable "ANDROID_NDK" "${ANDROID_NDK}"
+set_etc_environment_variable "ANDROID_NDK_HOME" "${ANDROID_NDK}"
+set_etc_environment_variable "ANDROID_NDK_ROOT" "${ANDROID_NDK}"
+set_etc_environment_variable "ANDROID_NDK_LATEST_HOME" "${ANDROID_SDK_ROOT}/ndk/${ndk_latest_full_version}"
 
 # Prepare components for installation
 extras=$(get_toolset_value '.android.extra_list[] | "extras;" + .')
@@ -119,6 +119,6 @@ sed -i "2i export JAVA_HOME=${JAVA_HOME_8_X64}" ${ANDROID_SDK_ROOT}/tools/bin/sd
 # Add required permissions
 chmod -R a+rwx ${ANDROID_SDK_ROOT}
 
-reloadEtcEnvironment
+reload_etc_environment
 
 invoke_tests "Android"
diff --git a/images/ubuntu/scripts/build/install-azure-devops-cli.sh b/images/ubuntu/scripts/build/install-azure-devops-cli.sh
index b1da23f4ec8f..81948ac95440 100644
--- a/images/ubuntu/scripts/build/install-azure-devops-cli.sh
+++ b/images/ubuntu/scripts/build/install-azure-devops-cli.sh
@@ -10,7 +10,7 @@ source $HELPER_SCRIPTS/etc-environment.sh
 # AZURE_EXTENSION_DIR shell variable defines where modules are installed
 # https://docs.microsoft.com/en-us/cli/azure/azure-cli-extensions-overview
 export AZURE_EXTENSION_DIR=/opt/az/azcliextensions
-setEtcEnvironmentVariable "AZURE_EXTENSION_DIR" "${AZURE_EXTENSION_DIR}"
+set_etc_environment_variable "AZURE_EXTENSION_DIR" "${AZURE_EXTENSION_DIR}"
 
 # install azure devops Cli extension
 az extension add -n azure-devops
diff --git a/images/ubuntu/scripts/build/install-clang.sh b/images/ubuntu/scripts/build/install-clang.sh
index 02dbe1190942..46732e341403 100644
--- a/images/ubuntu/scripts/build/install-clang.sh
+++ b/images/ubuntu/scripts/build/install-clang.sh
@@ -7,14 +7,14 @@
 # Source the helpers for use with the script
 source $HELPER_SCRIPTS/install.sh
 
-function InstallClang {
+install_clang() {
     local version=$1
 
     echo "Installing clang-$version..."
     apt-get install -y "clang-$version" "lldb-$version" "lld-$version" "clang-format-$version" "clang-tidy-$version"
 }
 
-function SetDefaultClang {
+set_default_clang() {
     local version=$1
 
     echo "Make Clang ${version} default"
@@ -30,11 +30,11 @@ default_clang_version=$(get_toolset_value '.clang.default_version')
 
 for version in ${versions[*]}; do
     if [[ $version != $default_clang_version ]]; then
-        InstallClang $version
+        install_clang $version
     fi
 done
 
-InstallClang $default_clang_version
-SetDefaultClang $default_clang_version
+install_clang $default_clang_version
+set_default_clang $default_clang_version
 
 invoke_tests "Tools" "clang"
diff --git a/images/ubuntu/scripts/build/install-container-tools.sh b/images/ubuntu/scripts/build/install-container-tools.sh
index d10bbf15b7b8..130356945e82 100644
--- a/images/ubuntu/scripts/build/install-container-tools.sh
+++ b/images/ubuntu/scripts/build/install-container-tools.sh
@@ -10,14 +10,14 @@ source $HELPER_SCRIPTS/os.sh
 # pin podman due to https://github.com/actions/runner-images/issues/7753
 #                   https://bugs.launchpad.net/ubuntu/+source/libpod/+bug/2024394
 #
-if isUbuntu20; then
+if is_ubuntu20; then
     install_packages=(podman buildah skopeo)
 else
     install_packages=(podman=3.4.4+ds1-1ubuntu1 buildah skopeo)
 fi
 
 # Packages is available in the official Ubuntu upstream starting from Ubuntu 21
-if isUbuntu20; then
+if is_ubuntu20; then
     REPO_URL="https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable"
     source /etc/os-release
     sh -c "echo 'deb ${REPO_URL}/x${NAME}_${VERSION_ID}/ /' > /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list"
@@ -31,7 +31,7 @@ apt-get -y install ${install_packages[@]}
 mkdir -p /etc/containers
 printf "[registries.search]\nregistries = ['docker.io', 'quay.io']\n" | tee /etc/containers/registries.conf
 
-if isUbuntu20; then
+if is_ubuntu20; then
     # Remove source repo
     rm /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list
     # Document source repo
diff --git a/images/ubuntu/scripts/build/install-docker.sh b/images/ubuntu/scripts/build/install-docker.sh
index e03e4d520d70..cbbed19a85e0 100644
--- a/images/ubuntu/scripts/build/install-docker.sh
+++ b/images/ubuntu/scripts/build/install-docker.sh
@@ -14,7 +14,7 @@ gpg_key="/usr/share/keyrings/docker.gpg"
 repo_path="/etc/apt/sources.list.d/docker.list"
 
 curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o $gpg_key
-echo "deb [arch=amd64 signed-by=$gpg_key] $repo_url $(getOSVersionLabel) stable" > $repo_path
+echo "deb [arch=amd64 signed-by=$gpg_key] $repo_url $(get_os_version_label) stable" > $repo_path
 apt-get update
 apt-get install --no-install-recommends docker-ce docker-ce-cli containerd.io docker-buildx-plugin
 
diff --git a/images/ubuntu/scripts/build/install-dotnetcore-sdk.sh b/images/ubuntu/scripts/build/install-dotnetcore-sdk.sh
index 3eef7af1a124..82c683d55dda 100644
--- a/images/ubuntu/scripts/build/install-dotnetcore-sdk.sh
+++ b/images/ubuntu/scripts/build/install-dotnetcore-sdk.sh
@@ -31,7 +31,7 @@ apt-get update
 
 for latest_package in ${LATEST_DOTNET_PACKAGES[@]}; do
     echo "Determing if .NET Core ($latest_package) is installed"
-    if ! IsPackageInstalled $latest_package; then
+    if ! dpkg -S $latest_package &> /dev/null; then
         echo "Could not find .NET Core ($latest_package), installing..."
         apt-get install $latest_package -y
     else
@@ -82,10 +82,10 @@ find . -name "*.tar.gz" | parallel --halt soon,fail=1 'extract_dotnet_sdk {}'
 
 # NuGetFallbackFolder at /usr/share/dotnet/sdk/NuGetFallbackFolder is warmed up by smoke test
 # Additional FTE will just copy to ~/.dotnet/NuGet which provides no benefit on a fungible machine
-setEtcEnvironmentVariable DOTNET_SKIP_FIRST_TIME_EXPERIENCE 1
-setEtcEnvironmentVariable DOTNET_NOLOGO 1
-setEtcEnvironmentVariable DOTNET_MULTILEVEL_LOOKUP 0
-prependEtcEnvironmentPath '$HOME/.dotnet/tools'
+set_etc_environment_variable DOTNET_SKIP_FIRST_TIME_EXPERIENCE 1
+set_etc_environment_variable DOTNET_NOLOGO 1
+set_etc_environment_variable DOTNET_MULTILEVEL_LOOKUP 0
+prepend_etc_environment_path '$HOME/.dotnet/tools'
 
 # install dotnet tools
 for dotnet_tool in ${DOTNET_TOOLS[@]}; do
diff --git a/images/ubuntu/scripts/build/install-firefox.sh b/images/ubuntu/scripts/build/install-firefox.sh
index 337d74339502..b4a81dcba508 100644
--- a/images/ubuntu/scripts/build/install-firefox.sh
+++ b/images/ubuntu/scripts/build/install-firefox.sh
@@ -19,7 +19,7 @@ repo_path="/etc/apt/sources.list.d/mozillateam-ubuntu-ppa-focal.list"
 
 # Install Firefox
 curl -fsSL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x${gpg_fingerprint}" | sudo gpg --dearmor -o $gpg_key
-echo "deb $repo_url $(getOSVersionLabel) main" > $repo_path
+echo "deb $repo_url $(get_os_version_label) main" > $repo_path
 
 apt-get update
 apt-get install --target-release 'o=LP-PPA-mozillateam' -y firefox
@@ -44,6 +44,6 @@ tar -xzf "$driver_archive_path" -C $GECKODRIVER_DIR
 
 chmod +x $GECKODRIVER_BIN
 ln -s "$GECKODRIVER_BIN" /usr/bin/
-setEtcEnvironmentVariable "GECKOWEBDRIVER" "${GECKODRIVER_DIR}"
+set_etc_environment_variable "GECKOWEBDRIVER" "${GECKODRIVER_DIR}"
 
 invoke_tests "Browsers" "Firefox"
diff --git a/images/ubuntu/scripts/build/install-gcc-compilers.sh b/images/ubuntu/scripts/build/install-gcc-compilers.sh
index cdefcfdbc7de..bfc4e0e746c2 100644
--- a/images/ubuntu/scripts/build/install-gcc-compilers.sh
+++ b/images/ubuntu/scripts/build/install-gcc-compilers.sh
@@ -8,13 +8,6 @@
 source $HELPER_SCRIPTS/os.sh
 source $HELPER_SCRIPTS/install.sh
 
-function InstallGcc {
-    version=$1
-
-    echo "Installing $version..."
-    apt-get install $version -y
-}
-
 # Install GNU C++ compiler
 add-apt-repository ppa:ubuntu-toolchain-r/test -y
 apt-get update -y
@@ -22,7 +15,8 @@ apt-get update -y
 versions=$(get_toolset_value '.gcc.versions[]')
 
 for version in ${versions[*]}; do
-    InstallGcc $version
+    echo "Installing $version..."
+    apt-get install $version -y
 done
 
 invoke_tests "Tools" "gcc"
diff --git a/images/ubuntu/scripts/build/install-gfortran.sh b/images/ubuntu/scripts/build/install-gfortran.sh
index c0dcdcc15415..024a0311e978 100644
--- a/images/ubuntu/scripts/build/install-gfortran.sh
+++ b/images/ubuntu/scripts/build/install-gfortran.sh
@@ -6,22 +6,15 @@
 source $HELPER_SCRIPTS/install.sh
 source $HELPER_SCRIPTS/os.sh
 
-function InstallFortran {
-    version=$1
-
-    echo "Installing $version..."
-    apt-get install $version -y
-}
-
 # Install GNU Fortran compiler
 add-apt-repository ppa:ubuntu-toolchain-r/test -y
 apt-get update -y
 
 versions=$(get_toolset_value '.gfortran.versions[]')
 
-for version in ${versions[*]}
-do
-    InstallFortran $version
+for version in ${versions[*]}; do
+    echo "Installing $version..."
+    apt-get install $version -y
 done
 
 invoke_tests "Tools" "gfortran"
diff --git a/images/ubuntu/scripts/build/install-google-chrome.sh b/images/ubuntu/scripts/build/install-google-chrome.sh
index 88b9202081da..b8458cbe900a 100644
--- a/images/ubuntu/scripts/build/install-google-chrome.sh
+++ b/images/ubuntu/scripts/build/install-google-chrome.sh
@@ -8,35 +8,37 @@
 source $HELPER_SCRIPTS/install.sh
 source $HELPER_SCRIPTS/etc-environment.sh
 
-function GetChromiumRevision {
-    CHROME_REVISION=$1
+get_chromium_revision() {
+    local chrome_revision=$1
 
     # Take the first part of the revision variable to search not only for a specific version,
     # but also for similar ones, so that we can get a previous one if the required revision is not found
-    CHROME_REVISION_PREFIX=${CHROME_REVISION:0:${#CHROME_REVISION}/2+1}
+    chrome_revision_prefix=${chrome_revision:0:${#chrome_revision}/2+1}
     SEARCH_URL="https://www.googleapis.com/storage/v1/b/chromium-browser-snapshots/o?delimiter=/&prefix=Linux_x64"
     # Revision can include a hash instead of a number. Need to filter it out https://github.com/actions/runner-images/issues/5256
-    REVISIONS_AVAILABLE=$(curl -s $SEARCH_URL/${CHROME_REVISION_PREFIX} | jq -r '.prefixes[]' | grep -E "Linux_x64\/[0-9]+\/"| cut -d "/" -f 2 | sort --version-sort)
+    revisions_available=$(curl -s $SEARCH_URL/${chrome_revision_prefix} | jq -r '.prefixes[]' | grep -E "Linux_x64\/[0-9]+\/"| cut -d "/" -f 2 | sort --version-sort)
 
     # If required Chromium revision is not found in the list
     # we should have to decrement the revision number until we find one.
     # This is mentioned in the documentation we use for this installation:
     # https://www.chromium.org/getting-involved/download-chromium
-    LATEST_VALID_REVISION=$(echo $REVISIONS_AVAILABLE | cut -f 1 -d " ")
-    for REVISION in $REVISIONS_AVAILABLE; do
-        if [ "$CHROME_REVISION" -lt "$REVISION" ]; then
+    latest_valid_revision=$(echo $revisions_available | cut -f 1 -d " ")
+    for revision in $revisions_available; do
+        if [ "$chrome_revision" -lt "$revision" ]; then
           break
         fi
-        LATEST_VALID_REVISION=$REVISION
+
+        latest_valid_revision=$revision
     done
-    echo $LATEST_VALID_REVISION
+
+    echo $latest_valid_revision
 }
 
 # Download and install Google Chrome
 CHROME_DEB_URL="https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb"
 CHROME_DEB_PATH=$(download_with_retry "$CHROME_DEB_URL")
 apt install "$CHROME_DEB_PATH" -f
-setEtcEnvironmentVariable "CHROME_BIN" "/usr/bin/google-chrome"
+set_etc_environment_variable "CHROME_BIN" "/usr/bin/google-chrome"
 
 # Remove Google Chrome repo
 rm -f /etc/cron.daily/google-chrome /etc/apt/sources.list.d/google-chrome.list /etc/apt/sources.list.d/google-chrome.list.save
@@ -63,11 +65,11 @@ unzip -qq "$driver_archive_path" -d /usr/local/share
 
 chmod +x $CHROMEDRIVER_BIN
 ln -s "$CHROMEDRIVER_BIN" /usr/bin/
-setEtcEnvironmentVariable "CHROMEWEBDRIVER" "${CHROMEDRIVER_DIR}"
+set_etc_environment_variable "CHROMEWEBDRIVER" "${CHROMEDRIVER_DIR}"
 
 # Download and unpack Chromium
 CHROME_REVISION=$(echo "${CHROME_VERSIONS_JSON}" | jq -r '.builds["'"$CHROME_VERSION"'"].revision')
-CHROMIUM_REVISION=$(GetChromiumRevision $CHROME_REVISION)
+CHROMIUM_REVISION=$(get_chromium_revision $CHROME_REVISION)
 CHROMIUM_URL="https://www.googleapis.com/download/storage/v1/b/chromium-browser-snapshots/o/Linux_x64%2F${CHROMIUM_REVISION}%2Fchrome-linux.zip?alt=media"
 CHROMIUM_DIR="/usr/local/share/chromium"
 CHROMIUM_BIN="${CHROMIUM_DIR}/chrome-linux/chrome"
diff --git a/images/ubuntu/scripts/build/install-haskell.sh b/images/ubuntu/scripts/build/install-haskell.sh
index 3e2796544af9..a5710fb7340a 100644
--- a/images/ubuntu/scripts/build/install-haskell.sh
+++ b/images/ubuntu/scripts/build/install-haskell.sh
@@ -13,13 +13,13 @@ export BOOTSTRAP_HASKELL_INSTALL_NO_STACK_HOOK=1
 export GHCUP_INSTALL_BASE_PREFIX=/usr/local
 export BOOTSTRAP_HASKELL_GHC_VERSION=0
 ghcup_bin=$GHCUP_INSTALL_BASE_PREFIX/.ghcup/bin
-setEtcEnvironmentVariable "BOOTSTRAP_HASKELL_NONINTERACTIVE" $BOOTSTRAP_HASKELL_NONINTERACTIVE
-setEtcEnvironmentVariable "GHCUP_INSTALL_BASE_PREFIX" $GHCUP_INSTALL_BASE_PREFIX
+set_etc_environment_variable "BOOTSTRAP_HASKELL_NONINTERACTIVE" $BOOTSTRAP_HASKELL_NONINTERACTIVE
+set_etc_environment_variable "GHCUP_INSTALL_BASE_PREFIX" $GHCUP_INSTALL_BASE_PREFIX
 
 # Install GHCup
 curl --proto '=https' --tlsv1.2 -fsSL https://get-ghcup.haskell.org | sh > /dev/null 2>&1 || true
 export PATH="$ghcup_bin:$PATH"
-prependEtcEnvironmentPath $ghcup_bin
+prepend_etc_environment_path $ghcup_bin
 
 availableVersions=$(ghcup list -t ghc -r | grep -v "prerelease" | awk '{print $2}')
 
diff --git a/images/ubuntu/scripts/build/install-homebrew.sh b/images/ubuntu/scripts/build/install-homebrew.sh
index 8f94e469cbaf..7fd491609a78 100644
--- a/images/ubuntu/scripts/build/install-homebrew.sh
+++ b/images/ubuntu/scripts/build/install-homebrew.sh
@@ -15,12 +15,12 @@ source $HELPER_SCRIPTS/install.sh
 # Invoke shellenv to make brew available during runnig session
 eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
 
-setEtcEnvironmentVariable HOMEBREW_NO_AUTO_UPDATE 1
-setEtcEnvironmentVariable HOMEBREW_CLEANUP_PERIODIC_FULL_DAYS 3650
+set_etc_environment_variable HOMEBREW_NO_AUTO_UPDATE 1
+set_etc_environment_variable HOMEBREW_CLEANUP_PERIODIC_FULL_DAYS 3650
 
 # Validate the installation ad hoc
 echo "Validate the installation reloading /etc/environment"
-reloadEtcEnvironment
+reload_etc_environment
 
 gfortran=$(brew --prefix)/bin/gfortran
 # Remove gfortran symlink, not to conflict with system gfortran
diff --git a/images/ubuntu/scripts/build/install-java-tools.sh b/images/ubuntu/scripts/build/install-java-tools.sh
index bee2b5fd0320..b1776b7940f0 100644
--- a/images/ubuntu/scripts/build/install-java-tools.sh
+++ b/images/ubuntu/scripts/build/install-java-tools.sh
@@ -8,71 +8,63 @@ source $HELPER_SCRIPTS/install.sh
 source $HELPER_SCRIPTS/os.sh
 source $HELPER_SCRIPTS/etc-environment.sh
 
-createJavaEnvironmentalVariable() {
-    local JAVA_VERSION=$1
-    local DEFAULT=$2
+create_java_environment_variable() {
+    local java_version=$1
+    local default=$2
 
-    local INSTALL_PATH_PATTERN="/usr/lib/jvm/temurin-${JAVA_VERSION}-jdk-amd64"
+    local install_path_pattern="/usr/lib/jvm/temurin-${java_version}-jdk-amd64"
 
-    if [[ ${DEFAULT} == "True" ]]; then
-        echo "Setting up JAVA_HOME variable to ${INSTALL_PATH_PATTERN}"
-        setEtcEnvironmentVariable "JAVA_HOME" "${INSTALL_PATH_PATTERN}"
+    if [[ ${default} == "True" ]]; then
+        echo "Setting up JAVA_HOME variable to ${install_path_pattern}"
+        set_etc_environment_variable "JAVA_HOME" "${install_path_pattern}"
         echo "Setting up default symlink"
-        update-java-alternatives -s ${INSTALL_PATH_PATTERN}
+        update-java-alternatives -s ${install_path_pattern}
     fi
 
-    echo "Setting up JAVA_HOME_${JAVA_VERSION}_X64 variable to ${INSTALL_PATH_PATTERN}"
-    setEtcEnvironmentVariable "JAVA_HOME_${JAVA_VERSION}_X64" "${INSTALL_PATH_PATTERN}"
+    echo "Setting up JAVA_HOME_${java_version}_X64 variable to ${install_path_pattern}"
+    set_etc_environment_variable "JAVA_HOME_${java_version}_X64" "${install_path_pattern}"
 }
 
-enableRepositories() {
-    osLabel=$(getOSVersionLabel)
-
-    # Add Addoptium PPA
-    # apt-key is deprecated, dearmor and add manually
-    wget -qO - https://packages.adoptium.net/artifactory/api/gpg/key/public | gpg --dearmor > /usr/share/keyrings/adoptium.gpg
-    echo "deb [signed-by=/usr/share/keyrings/adoptium.gpg] https://packages.adoptium.net/artifactory/deb/ $osLabel main" > /etc/apt/sources.list.d/adoptium.list
-
-}
-
-installOpenJDK() {
-    local JAVA_VERSION=$1
+install_open_jdk() {
+    local java_version=$1
 
     # Install Java from PPA repositories.
-    apt-get -y install temurin-${JAVA_VERSION}-jdk=\*
-    javaVersionPath="/usr/lib/jvm/temurin-${JAVA_VERSION}-jdk-amd64"
+    apt-get -y install temurin-${java_version}-jdk=\*
+    java_version_path="/usr/lib/jvm/temurin-${java_version}-jdk-amd64"
 
-    JAVA_TOOLCACHE_PATH="${AGENT_TOOLSDIRECTORY}/Java_Temurin-Hotspot_jdk"
+    java_toolcache_path="${AGENT_TOOLSDIRECTORY}/Java_Temurin-Hotspot_jdk"
 
-    fullJavaVersion=$(cat "${javaVersionPath}/release" | grep "^SEMANTIC" | cut -d "=" -f 2 | tr -d "\"" | tr "+" "-")
+    full_java_version=$(cat "${java_version_path}/release" | grep "^SEMANTIC" | cut -d "=" -f 2 | tr -d "\"" | tr "+" "-")
 
     # If there is no semver in java release, then extract java version from -fullversion
-    [[ -z ${fullJavaVersion} ]] && fullJavaVersion=$(${javaVersionPath}/bin/java -fullversion 2>&1 | tr -d "\"" | tr "+" "-" | awk '{print $4}')
+    [[ -z ${full_java_version} ]] && full_java_version=$(${java_version_path}/bin/java -fullversion 2>&1 | tr -d "\"" | tr "+" "-" | awk '{print $4}')
 
     # Convert non valid semver like 11.0.14.1-9 -> 11.0.14-9
     # https://github.com/adoptium/temurin-build/issues/2248
-    [[ ${fullJavaVersion} =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+ ]] && fullJavaVersion=$(echo $fullJavaVersion | sed -E 's/\.[0-9]+-/-/')
+    [[ ${full_java_version} =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+ ]] && full_java_version=$(echo $full_java_version | sed -E 's/\.[0-9]+-/-/')
 
     # When version string is too short, add extra ".0" to make it valid semver
-    [[ ${fullJavaVersion} =~ ^[0-9]+- ]] && fullJavaVersion=$(echo $fullJavaVersion | sed -E 's/-/.0-/')
-    [[ ${fullJavaVersion} =~ ^[0-9]+\.[0-9]+- ]] && fullJavaVersion=$(echo $fullJavaVersion | sed -E 's/-/.0-/')
+    [[ ${full_java_version} =~ ^[0-9]+- ]] && full_java_version=$(echo $full_java_version | sed -E 's/-/.0-/')
+    [[ ${full_java_version} =~ ^[0-9]+\.[0-9]+- ]] && full_java_version=$(echo $full_java_version | sed -E 's/-/.0-/')
 
-    javaToolcacheVersionPath="${JAVA_TOOLCACHE_PATH}/${fullJavaVersion}"
-    echo "Java ${JAVA_VERSION} Toolcache Version Path: ${javaToolcacheVersionPath}"
-    mkdir -p "${javaToolcacheVersionPath}"
+    java_toolcache_version_path="${java_toolcache_path}/${full_java_version}"
+    echo "Java ${java_version} Toolcache Version Path: ${java_toolcache_version_path}"
+    mkdir -p "${java_toolcache_version_path}"
 
     # Create a complete file
-    touch "${javaToolcacheVersionPath}/x64.complete"
+    touch "${java_toolcache_version_path}/x64.complete"
 
     # Create symlink for Java
-    ln -s ${javaVersionPath} "${javaToolcacheVersionPath}/x64"
+    ln -s ${java_version_path} "${java_toolcache_version_path}/x64"
 
     # add extra permissions to be able execute command without sudo
     chmod -R 777 /usr/lib/jvm
 }
 
-# Fetch repositories data
-enableRepositories
+# Add Addoptium PPA
+# apt-key is deprecated, dearmor and add manually
+wget -qO - https://packages.adoptium.net/artifactory/api/gpg/key/public | gpg --dearmor > /usr/share/keyrings/adoptium.gpg
+echo "deb [signed-by=/usr/share/keyrings/adoptium.gpg] https://packages.adoptium.net/artifactory/deb/ $(get_os_version_label) main" > /etc/apt/sources.list.d/adoptium.list
 
 # Get all the updates from enabled repositories.
 apt-get update
@@ -81,19 +73,19 @@ defaultVersion=$(get_toolset_value '.java.default')
 jdkVersionsToInstall=($(get_toolset_value ".java.versions[]"))
 
 for jdkVersionToInstall in ${jdkVersionsToInstall[@]}; do
-    installOpenJDK ${jdkVersionToInstall}
+    install_open_jdk ${jdkVersionToInstall}
 
     if [[ ${jdkVersionToInstall} == ${defaultVersion} ]]
     then
-        createJavaEnvironmentalVariable ${jdkVersionToInstall} True
+        create_java_environment_variable ${jdkVersionToInstall} True
     else
-        createJavaEnvironmentalVariable ${jdkVersionToInstall} False
+        create_java_environment_variable ${jdkVersionToInstall} False
     fi
 done
 
 # Install Ant
 apt-get install -y --no-install-recommends ant ant-optional
-setEtcEnvironmentVariable "ANT_HOME" "/usr/share/ant"
+set_etc_environment_variable "ANT_HOME" "/usr/share/ant"
 
 # Install Maven
 mavenVersion=$(get_toolset_value '.java.maven')
@@ -114,7 +106,7 @@ gradle_archive_path=$(download_with_retry "$gradleDownloadUrl")
 unzip -qq -d /usr/share "$gradle_archive_path"
 ln -s /usr/share/gradle-"${gradleLatestVersion}"/bin/gradle /usr/bin/gradle
 gradle_home_dir=$(find /usr/share -depth -maxdepth 1 -name "gradle*")
-setEtcEnvironmentVariable "GRADLE_HOME" "${gradle_home_dir}"
+set_etc_environment_variable "GRADLE_HOME" "${gradle_home_dir}"
 
 # Delete java repositories and keys
 rm -f /etc/apt/sources.list.d/adoptium.list
@@ -122,5 +114,5 @@ rm -f /etc/apt/sources.list.d/zulu.list
 rm -f /usr/share/keyrings/adoptium.gpg
 rm -f /usr/share/keyrings/zulu.gpg
 
-reloadEtcEnvironment
+reload_etc_environment
 invoke_tests "Java"
diff --git a/images/ubuntu/scripts/build/install-leiningen.sh b/images/ubuntu/scripts/build/install-leiningen.sh
index 400385958cfa..6d61d78e11d5 100644
--- a/images/ubuntu/scripts/build/install-leiningen.sh
+++ b/images/ubuntu/scripts/build/install-leiningen.sh
@@ -16,7 +16,7 @@ export LEIN_HOME=/usr/local/lib/lein
 lein
 
 LEIN_JAR=$(find $LEIN_HOME -name "leiningen-*-standalone.jar")
-setEtcEnvironmentVariable "LEIN_JAR" "${LEIN_JAR}"
-setEtcEnvironmentVariable "LEIN_HOME" "${LEIN_HOME}"
+set_etc_environment_variable "LEIN_JAR" "${LEIN_JAR}"
+set_etc_environment_variable "LEIN_HOME" "${LEIN_HOME}"
 
 invoke_tests "Tools" "Leiningen"
diff --git a/images/ubuntu/scripts/build/install-microsoft-edge.sh b/images/ubuntu/scripts/build/install-microsoft-edge.sh
index a52f4cb27400..221ccc5133ac 100644
--- a/images/ubuntu/scripts/build/install-microsoft-edge.sh
+++ b/images/ubuntu/scripts/build/install-microsoft-edge.sh
@@ -46,6 +46,6 @@ unzip -qq "$EDGEDRIVER_ARCHIVE_PATH" -d "$EDGEDRIVER_DIR"
 chmod +x $EDGEDRIVER_BIN
 ln -s $EDGEDRIVER_BIN /usr/bin
 
-setEtcEnvironmentVariable "EDGEWEBDRIVER" "${EDGEDRIVER_DIR}"
+set_etc_environment_variable "EDGEWEBDRIVER" "${EDGEDRIVER_DIR}"
 
 invoke_tests "Browsers" "Edge"
diff --git a/images/ubuntu/scripts/build/install-miniconda.sh b/images/ubuntu/scripts/build/install-miniconda.sh
index 805a9325c340..2e8e7b4177b7 100644
--- a/images/ubuntu/scripts/build/install-miniconda.sh
+++ b/images/ubuntu/scripts/build/install-miniconda.sh
@@ -14,7 +14,7 @@ curl -fsSL https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh
     && rm miniconda.sh
 
 CONDA=/usr/share/miniconda
-setEtcEnvironmentVariable "CONDA" "${CONDA}"
+set_etc_environment_variable "CONDA" "${CONDA}"
 
 ln -s $CONDA/bin/conda /usr/bin/conda
 
diff --git a/images/ubuntu/scripts/build/install-mongodb.sh b/images/ubuntu/scripts/build/install-mongodb.sh
index 063d7b315e97..7a47185347ac 100644
--- a/images/ubuntu/scripts/build/install-mongodb.sh
+++ b/images/ubuntu/scripts/build/install-mongodb.sh
@@ -9,7 +9,7 @@ source $HELPER_SCRIPTS/os.sh
 source $HELPER_SCRIPTS/install.sh
 
 REPO_URL="https://repo.mongodb.org/apt/ubuntu"
-osLabel=$(getOSVersionLabel)
+osLabel=$(get_os_version_label)
 toolsetVersion=$(get_toolset_value '.mongodb.version')
 
 #  Install Mongo DB
diff --git a/images/ubuntu/scripts/build/install-mono.sh b/images/ubuntu/scripts/build/install-mono.sh
index ebeb0a750713..e8be1f9c6a71 100644
--- a/images/ubuntu/scripts/build/install-mono.sh
+++ b/images/ubuntu/scripts/build/install-mono.sh
@@ -9,7 +9,7 @@ source $HELPER_SCRIPTS/os.sh
 LSB_CODENAME=$(lsb_release -cs)
 
 # There are no packages for Ubuntu 22 in the repo, but developers confirmed that packages from Ubuntu 20 should work
-if isUbuntu22; then
+if is_ubuntu22; then
     LSB_CODENAME="focal"
 fi
 
diff --git a/images/ubuntu/scripts/build/install-nvm.sh b/images/ubuntu/scripts/build/install-nvm.sh
index 91848911d2ad..c63aaab3e9c6 100644
--- a/images/ubuntu/scripts/build/install-nvm.sh
+++ b/images/ubuntu/scripts/build/install-nvm.sh
@@ -11,7 +11,7 @@ export NVM_DIR="/etc/skel/.nvm"
 mkdir $NVM_DIR
 VERSION=$(curl -fsSL https://api.github.com/repos/nvm-sh/nvm/releases/latest | jq -r '.tag_name')
 curl -fsSL https://raw.githubusercontent.com/nvm-sh/nvm/$VERSION/install.sh | bash
-setEtcEnvironmentVariable "NVM_DIR" '$HOME/.nvm'
+set_etc_environment_variable "NVM_DIR" '$HOME/.nvm'
 echo '[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm' | tee -a /etc/skel/.bash_profile
 [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
 
diff --git a/images/ubuntu/scripts/build/install-php.sh b/images/ubuntu/scripts/build/install-php.sh
index 3f8ce40ddd45..81409da4694b 100644
--- a/images/ubuntu/scripts/build/install-php.sh
+++ b/images/ubuntu/scripts/build/install-php.sh
@@ -11,7 +11,7 @@ source $HELPER_SCRIPTS/install.sh
 
 # add repository for old Ubuntu images
 # details in thread: https://github.com/actions/runner-images/issues/6331
-if isUbuntu20; then
+if is_ubuntu20; then
     apt-add-repository ppa:ondrej/php -y
     apt-get update
 fi
@@ -94,7 +94,7 @@ sudo mv composer.phar /usr/bin/composer
 php -r "unlink('composer-setup.php');"
 
 # Add composer bin folder to path
-prependEtcEnvironmentPath '$HOME/.config/composer/vendor/bin'
+prepend_etc_environment_path '$HOME/.config/composer/vendor/bin'
 
 #Create composer folder for user to preserve folder permissions
 mkdir -p /etc/skel/.composer
@@ -106,7 +106,7 @@ mv phpunit /usr/local/bin/phpunit
 
 # ubuntu 20.04 libzip-dev is libzip5 based and is not compatible libzip-dev of ppa:ondrej/php
 # see https://github.com/actions/runner-images/issues/1084
-if isUbuntu20; then
+if is_ubuntu20; then
   rm /etc/apt/sources.list.d/ondrej-*.list
   apt-get update
 fi
diff --git a/images/ubuntu/scripts/build/install-postgresql.sh b/images/ubuntu/scripts/build/install-postgresql.sh
index f7e16c31764b..18b5bc037052 100644
--- a/images/ubuntu/scripts/build/install-postgresql.sh
+++ b/images/ubuntu/scripts/build/install-postgresql.sh
@@ -12,7 +12,7 @@ REPO_URL="https://apt.postgresql.org/pub/repos/apt/"
 
 # Preparing repo for PostgreSQL
 wget -qO - https://www.postgresql.org/media/keys/ACCC4CF8.asc | gpg --dearmor > /usr/share/keyrings/postgresql.gpg
-echo "deb [signed-by=/usr/share/keyrings/postgresql.gpg] $REPO_URL $(getOSVersionLabel)-pgdg main" > /etc/apt/sources.list.d/pgdg.list
+echo "deb [signed-by=/usr/share/keyrings/postgresql.gpg] $REPO_URL $(get_os_version_label)-pgdg main" > /etc/apt/sources.list.d/pgdg.list
 
 # Fetch PostgreSQL version to install from the toolset
 toolsetVersion=$(get_toolset_value '.postgresql.version')
diff --git a/images/ubuntu/scripts/build/install-pypy.sh b/images/ubuntu/scripts/build/install-pypy.sh
index 51f09cbc5c05..47dba4496e18 100644
--- a/images/ubuntu/scripts/build/install-pypy.sh
+++ b/images/ubuntu/scripts/build/install-pypy.sh
@@ -7,70 +7,69 @@
 source $HELPER_SCRIPTS/install.sh
 
 # This function installs PyPy using the specified arguments:
-#   $1=PACKAGE_URL
-function InstallPyPy
-{
-    PACKAGE_URL=$1
+#   $1=package_url
+install_pypy() {
+    local package_url=$1
 
-    PACKAGE_TAR_NAME=$(echo "$PACKAGE_URL" | awk -F/ '{print $NF}')
-    PACKAGE_NAME=${PACKAGE_TAR_NAME/.tar.bz2/}
+    package_tar_name=$(echo "$package_url" | awk -F/ '{print $NF}')
+    package_name=${package_tar_name/.tar.bz2/}
 
-    echo "Downloading tar archive '$PACKAGE_NAME'"
-    PACKAGE_TAR_TEMP_PATH=$(download_with_retry $PACKAGE_URL)
+    echo "Downloading tar archive '$package_name'"
+    package_tar_temp_path=$(download_with_retry $package_url)
 
-    echo "Expand '$PACKAGE_NAME' to the /tmp folder"
-    tar xf "$PACKAGE_TAR_TEMP_PATH" -C /tmp
+    echo "Expand '$package_name' to the /tmp folder"
+    tar xf "$package_tar_temp_path" -C /tmp
 
     # Get Python version
-    MAJOR_VERSION=$(echo ${PACKAGE_NAME/pypy/} | cut -d. -f1)
-    PYTHON_MAJOR="python$MAJOR_VERSION"
+    major_version=$(echo ${package_name/pypy/} | cut -d. -f1)
+    python_major="python$major_version"
 
-    if [ $MAJOR_VERSION != 2 ]; then
-        PYPY_MAJOR="pypy$MAJOR_VERSION"
+    if [ $major_version != 2 ]; then
+        pypy_major="pypy$major_version"
     else
-        PYPY_MAJOR="pypy"
+        pypy_major="pypy"
     fi
 
-    PACKAGE_TEMP_FOLDER="/tmp/$PACKAGE_NAME"
-    PYTHON_FULL_VERSION=$("$PACKAGE_TEMP_FOLDER/bin/$PYPY_MAJOR" -c "import sys;print('{}.{}.{}'.format(sys.version_info[0],sys.version_info[1],sys.version_info[2]))")
-    PYPY_FULL_VERSION=$("$PACKAGE_TEMP_FOLDER/bin/$PYPY_MAJOR" -c "import sys;print('{}.{}.{}'.format(*sys.pypy_version_info[0:3]))")
-    echo "Put '$PYPY_FULL_VERSION' to PYPY_VERSION file"
-    echo $PYPY_FULL_VERSION > "$PACKAGE_TEMP_FOLDER/PYPY_VERSION"
+    package_temp_folder="/tmp/$package_name"
+    python_full_version=$("$package_temp_folder/bin/$pypy_major" -c "import sys;print('{}.{}.{}'.format(sys.version_info[0],sys.version_info[1],sys.version_info[2]))")
+    pypy_full_version=$("$package_temp_folder/bin/$pypy_major" -c "import sys;print('{}.{}.{}'.format(*sys.pypy_version_info[0:3]))")
+    echo "Put '$pypy_full_version' to PYPY_VERSION file"
+    echo $pypy_full_version > "$package_temp_folder/PYPY_VERSION"
 
     # PyPy folder structure
-    PYPY_TOOLCACHE_PATH=$AGENT_TOOLSDIRECTORY/PyPy
-    PYPY_TOOLCACHE_VERSION_PATH=$PYPY_TOOLCACHE_PATH/$PYTHON_FULL_VERSION
-    PYPY_TOOLCACHE_VERSION_ARCH_PATH=$PYPY_TOOLCACHE_VERSION_PATH/x64
+    pypy_toolcache_path=$AGENT_TOOLSDIRECTORY/PyPy
+    pypy_toolcache_version_path=$pypy_toolcache_path/$python_full_version
+    pypy_toolcache_version_arch_path=$pypy_toolcache_version_path/x64
 
     echo "Check if PyPy hostedtoolcache folder exist..."
-    if [ ! -d $PYPY_TOOLCACHE_PATH ]; then
-        mkdir -p $PYPY_TOOLCACHE_PATH
+    if [ ! -d $pypy_toolcache_path ]; then
+        mkdir -p $pypy_toolcache_path
     fi
 
-    echo "Create PyPy '$PYPY_TOOLCACHE_VERSION_PATH' folder"
-    mkdir $PYPY_TOOLCACHE_VERSION_PATH
+    echo "Create PyPy '$pypy_toolcache_version_path' folder"
+    mkdir $pypy_toolcache_version_path
 
-    echo "Move PyPy '$PACKAGE_TEMP_FOLDER' binaries to '$PYPY_TOOLCACHE_VERSION_ARCH_PATH' folder"
-    mv $PACKAGE_TEMP_FOLDER $PYPY_TOOLCACHE_VERSION_ARCH_PATH
+    echo "Move PyPy '$package_temp_folder' binaries to '$pypy_toolcache_version_arch_path' folder"
+    mv $package_temp_folder $pypy_toolcache_version_arch_path
 
     echo "Create additional symlinks (Required for UsePythonVersion Azure DevOps task)"
-    cd $PYPY_TOOLCACHE_VERSION_ARCH_PATH/bin
+    cd $pypy_toolcache_version_arch_path/bin
 
     # Starting from PyPy 7.3.4 these links are already included in the package
-    [ -f ./$PYTHON_MAJOR ] || ln -s $PYPY_MAJOR $PYTHON_MAJOR
-    [ -f ./python ] || ln -s $PYTHON_MAJOR python
+    [ -f ./$python_major ] || ln -s $pypy_major $python_major
+    [ -f ./python ] || ln -s $python_major python
 
-    chmod +x ./python ./$PYTHON_MAJOR
+    chmod +x ./python ./$python_major
 
     echo "Install latest Pip"
     ./python -m ensurepip
     ./python -m pip install --ignore-installed pip
 
     echo "Create complete file"
-    touch $PYPY_TOOLCACHE_VERSION_PATH/x64.complete
+    touch $pypy_toolcache_version_path/x64.complete
 
-    echo "Remove '$PACKAGE_TAR_TEMP_PATH'"
-    rm -f $PACKAGE_TAR_TEMP_PATH
+    echo "Remove '$package_tar_temp_path'"
+    rm -f $package_tar_temp_path
 }
 
 # Installation PyPy
@@ -87,7 +86,7 @@ for toolsetVersion in $toolsetVersions; do
         exit 1
     fi
 
-    InstallPyPy $latestMajorPyPyVersion
+    install_pypy $latestMajorPyPyVersion
 done
 
 chown -R "$SUDO_USER:$SUDO_USER" "$AGENT_TOOLSDIRECTORY/PyPy"
diff --git a/images/ubuntu/scripts/build/install-python.sh b/images/ubuntu/scripts/build/install-python.sh
index 70321af93d29..846aa4206289 100644
--- a/images/ubuntu/scripts/build/install-python.sh
+++ b/images/ubuntu/scripts/build/install-python.sh
@@ -19,9 +19,9 @@ export PIPX_HOME=/opt/pipx
 python3 -m pip install pipx
 python3 -m pipx ensurepath
 # Update /etc/environment
-setEtcEnvironmentVariable "PIPX_BIN_DIR" $PIPX_BIN_DIR
-setEtcEnvironmentVariable "PIPX_HOME" $PIPX_HOME
-prependEtcEnvironmentPath $PIPX_BIN_DIR
+set_etc_environment_variable "PIPX_BIN_DIR" $PIPX_BIN_DIR
+set_etc_environment_variable "PIPX_HOME" $PIPX_HOME
+prepend_etc_environment_path $PIPX_BIN_DIR
 # Test pipx
 if ! command -v pipx; then
     echo "pipx was not installed or not found on PATH"
@@ -29,6 +29,6 @@ if ! command -v pipx; then
 fi
 
 # Adding this dir to PATH will make installed pip commands are immediately available.
-prependEtcEnvironmentPath '$HOME/.local/bin'
+prepend_etc_environment_path '$HOME/.local/bin'
 
 invoke_tests "Tools" "Python"
diff --git a/images/ubuntu/scripts/build/install-rlang.sh b/images/ubuntu/scripts/build/install-rlang.sh
index a463b0d6681a..7445d7de507e 100644
--- a/images/ubuntu/scripts/build/install-rlang.sh
+++ b/images/ubuntu/scripts/build/install-rlang.sh
@@ -8,7 +8,7 @@
 source $HELPER_SCRIPTS/os.sh
 
 # install R
-osLabel=$(getOSVersionLabel)
+osLabel=$(get_os_version_label)
 
 wget -qO- https://cloud.r-project.org/bin/linux/ubuntu/marutter_pubkey.asc | gpg --dearmor > /usr/share/keyrings/rlang.gpg
 echo "deb [signed-by=/usr/share/keyrings/rlang.gpg] https://cloud.r-project.org/bin/linux/ubuntu $osLabel-cran40/" > /etc/apt/sources.list.d/rlang.list
diff --git a/images/ubuntu/scripts/build/install-rust.sh b/images/ubuntu/scripts/build/install-rust.sh
index b046b75f5565..2f0c8a0c0b10 100644
--- a/images/ubuntu/scripts/build/install-rust.sh
+++ b/images/ubuntu/scripts/build/install-rust.sh
@@ -19,7 +19,7 @@ source $CARGO_HOME/env
 # Install common tools
 rustup component add rustfmt clippy
 
-if isUbuntu22; then
+if is_ubuntu22; then
     cargo install bindgen-cli cbindgen cargo-audit cargo-outdated
 else
     cargo install --locked bindgen-cli cbindgen cargo-audit cargo-outdated
@@ -29,6 +29,6 @@ fi
 rm -rf ${CARGO_HOME}/registry/*
 
 # Update /etc/environemnt
-prependEtcEnvironmentPath '$HOME/.cargo/bin'
+prepend_etc_environment_path '$HOME/.cargo/bin'
 
 invoke_tests "Tools" "Rust"
diff --git a/images/ubuntu/scripts/build/install-selenium.sh b/images/ubuntu/scripts/build/install-selenium.sh
index 1a18510fb796..3b9360762c19 100644
--- a/images/ubuntu/scripts/build/install-selenium.sh
+++ b/images/ubuntu/scripts/build/install-selenium.sh
@@ -19,6 +19,6 @@ SELENIUM_FULL_VERSION=$(echo $SELENIUM_DOWNLOAD_URL | awk -F"selenium-server-|.j
 touch "/usr/share/java/selenium-server-$SELENIUM_FULL_VERSION"
 
 # Add SELENIUM_JAR_PATH environment variable
-setEtcEnvironmentVariable "SELENIUM_JAR_PATH" "$SELENIUM_JAR_PATH"
+set_etc_environment_variable "SELENIUM_JAR_PATH" "$SELENIUM_JAR_PATH"
 
 invoke_tests "Tools" "Selenium"
diff --git a/images/ubuntu/scripts/build/install-sqlpackage.sh b/images/ubuntu/scripts/build/install-sqlpackage.sh
index 537d1b29bc0c..d8dcb89ed1f9 100644
--- a/images/ubuntu/scripts/build/install-sqlpackage.sh
+++ b/images/ubuntu/scripts/build/install-sqlpackage.sh
@@ -9,7 +9,7 @@ source $HELPER_SCRIPTS/install.sh
 source $HELPER_SCRIPTS/os.sh
 
 # Install libssl1.1 dependency
-if isUbuntu22; then
+if is_ubuntu22; then
     libssl_deb_path=$(download_with_retry "http://security.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2.20_amd64.deb")
     libssl_hash="0b3251aee55db6e20d02f4b9a2b703c9874a85ab6a20b12f4870f52f91633d37"
     use_checksum_comparison "$libssl_deb_path" "$libssl_hash"
diff --git a/images/ubuntu/scripts/build/install-swift.sh b/images/ubuntu/scripts/build/install-swift.sh
index 64fc6637f237..43e3f2b16ee7 100644
--- a/images/ubuntu/scripts/build/install-swift.sh
+++ b/images/ubuntu/scripts/build/install-swift.sh
@@ -42,6 +42,6 @@ ln -s "$SWIFT_BIN_ROOT/swift" /usr/local/bin/swift
 ln -s "$SWIFT_BIN_ROOT/swiftc" /usr/local/bin/swiftc
 ln -s "$SWIFT_LIB_ROOT/libsourcekitdInProc.so" /usr/local/lib/libsourcekitdInProc.so
 
-setEtcEnvironmentVariable "SWIFT_PATH" "${SWIFT_BIN_ROOT}"
+set_etc_environment_variable "SWIFT_PATH" "${SWIFT_BIN_ROOT}"
 
 invoke_tests "Common" "Swift"
diff --git a/images/ubuntu/scripts/build/install-vcpkg.sh b/images/ubuntu/scripts/build/install-vcpkg.sh
index 8d407cad5aba..5fd65f39c5d3 100644
--- a/images/ubuntu/scripts/build/install-vcpkg.sh
+++ b/images/ubuntu/scripts/build/install-vcpkg.sh
@@ -9,7 +9,7 @@ source $HELPER_SCRIPTS/etc-environment.sh
 
 # Set env variable for vcpkg
 VCPKG_INSTALLATION_ROOT=/usr/local/share/vcpkg
-setEtcEnvironmentVariable "VCPKG_INSTALLATION_ROOT" "${VCPKG_INSTALLATION_ROOT}"
+set_etc_environment_variable "VCPKG_INSTALLATION_ROOT" "${VCPKG_INSTALLATION_ROOT}"
 
 # Install vcpkg
 git clone https://github.com/Microsoft/vcpkg $VCPKG_INSTALLATION_ROOT
diff --git a/images/ubuntu/scripts/helpers/etc-environment.sh b/images/ubuntu/scripts/helpers/etc-environment.sh
index 7ec5907dce1e..4255c9d01a3f 100644
--- a/images/ubuntu/scripts/helpers/etc-environment.sh
+++ b/images/ubuntu/scripts/helpers/etc-environment.sh
@@ -8,68 +8,67 @@
 #     values containg slashes (i.e. directory path)
 #     The values containing '%' will break the functions
 
-getEtcEnvironmentVariable () {
-    variable_name="$1"
+get_etc_environment_variable() {
+    local variable_name=$1
 
     # remove `variable_name=` and possible quotes from the line
     grep "^${variable_name}=" /etc/environment | sed -E "s%^${variable_name}=\"?([^\"]+)\"?.*$%\1%"
 }
 
-addEtcEnvironmentVariable () {
-    variable_name="$1"
-    variable_value="$2"
+add_etc_environment_variable() {
+    local variable_name=$1
+    local variable_value=$2
 
     echo "${variable_name}=${variable_value}" | sudo tee -a /etc/environment
 }
 
-replaceEtcEnvironmentVariable () {
-    variable_name="$1"
-    variable_value="$2"
+replace_etc_environment_variable() {
+    local variable_name=$1
+    local variable_value=$2
 
     # modify /etc/environemnt in place by replacing a string that begins with variable_name
     sudo sed -i -e "s%^${variable_name}=.*$%${variable_name}=\"${variable_value}\"%" /etc/environment
 }
 
-setEtcEnvironmentVariable () {
-    variable_name="$1"
-    variable_value="$2"
+set_etc_environment_variable() {
+    local variable_name=$1
+    local variable_value=$2
 
-    if grep "^${variable_name}=" /etc/environment > /dev/null
-    then
-        replaceEtcEnvironmentVariable $variable_name $variable_value
+    if grep "^${variable_name}=" /etc/environment > /dev/null; then
+        replace_etc_environment_variable $variable_name $variable_value
     else
-        addEtcEnvironmentVariable $variable_name $variable_value
+        add_etc_environment_variable $variable_name $variable_value
     fi
 }
 
-prependEtcEnvironmentVariable () {
-    variable_name="$1"
-    element="$2"
+prepend_etc_environment_variable() {
+    local variable_name=$1
+    local element=$2
 
     # TODO: handle the case if the variable does not exist
-    existing_value=$(getEtcEnvironmentVariable "${variable_name}")
-    setEtcEnvironmentVariable "${variable_name}" "${element}:${existing_value}"
+    existing_value=$(get_etc_environment_variable "${variable_name}")
+    set_etc_environment_variable "${variable_name}" "${element}:${existing_value}"
 }
 
-appendEtcEnvironmentVariable () {
-    variable_name="$1"
-    element="$2"
+append_etc_environment_variable() {
+    local variable_name=$1
+    local element=$2
 
     # TODO: handle the case if the variable does not exist
-    existing_value=$(getEtcEnvironmentVariable "${variable_name}")
-    setEtcEnvironmentVariable "${variable_name}" "${existing_value}:${element}"
+    existing_value=$(get_etc_environment_variable "${variable_name}")
+    set_etc_environment_variable "${variable_name}" "${existing_value}:${element}"
 }
 
-prependEtcEnvironmentPath () {
-    element="$1"
+prepend_etc_environment_path() {
+    local element=$1
 
-    prependEtcEnvironmentVariable PATH "${element}"
+    prepend_etc_environment_variable PATH "${element}"
 }
 
-appendEtcEnvironmentPath () {
-    element="$1"
+append_etc_environment_path() {
+    local element=$1
 
-    appendEtcEnvironmentVariable PATH "${element}"
+    append_etc_environment_variable PATH "${element}"
 }
 
 # Process /etc/environment as if it were shell script with `export VAR=...` expressions
@@ -81,10 +80,10 @@ appendEtcEnvironmentPath () {
 # TODO: there might be the others variables to be processed in the same way as "PATH" variable
 #       ie MANPATH, INFOPATH, LD_*, etc. In the current implementation the values from /etc/evironments
 #       replace the values of the current environment
-reloadEtcEnvironment () {
+reload_etc_environment() {
     # add `export ` to every variable of /etc/environemnt except PATH and eval the result shell script
     eval $(grep -v '^PATH=' /etc/environment | sed -e 's%^%export %')
     # handle PATH specially
-    etc_path=$(getEtcEnvironmentVariable PATH)
+    etc_path=$(get_etc_environment_variable PATH)
     export PATH="$PATH:$etc_path"
 }
diff --git a/images/ubuntu/scripts/helpers/install.sh b/images/ubuntu/scripts/helpers/install.sh
index 40a0b816199b..626e06f73a44 100644
--- a/images/ubuntu/scripts/helpers/install.sh
+++ b/images/ubuntu/scripts/helpers/install.sh
@@ -5,8 +5,8 @@
 ################################################################################
 
 download_with_retry() {
-    url=$1
-    download_path=$2
+    local url=$1
+    local download_path=$2
 
     if [ -z "$download_path" ]; then
         download_path="/tmp/$(basename "$url")"
@@ -45,15 +45,6 @@ download_with_retry() {
     echo "$download_path"
 }
 
-## Use dpkg to figure out if a package has already been installed
-## Example use:
-## if ! IsPackageInstalled packageName; then
-##     echo "packageName is not installed!"
-## fi
-IsPackageInstalled() {
-    dpkg -S $1 &> /dev/null
-}
-
 get_toolset_value() {
     local toolset_path="/imagegeneration/installers/toolset.json"
     local query=$1
diff --git a/images/ubuntu/scripts/helpers/os.sh b/images/ubuntu/scripts/helpers/os.sh
index 894ee025a8d5..c500ab582e83 100644
--- a/images/ubuntu/scripts/helpers/os.sh
+++ b/images/ubuntu/scripts/helpers/os.sh
@@ -4,17 +4,14 @@
 ##  Desc:  Helper functions for OS releases
 ################################################################################
 
-function isUbuntu20
-{
+is_ubuntu20() {
     lsb_release -d | grep -q 'Ubuntu 20'
 }
 
-function isUbuntu22
-{
+is_ubuntu22() {
     lsb_release -d | grep -q 'Ubuntu 22'
 }
 
-function getOSVersionLabel
-{
+get_os_version_label() {
     lsb_release -cs
 }