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+## Summury on signed commits
+The key point for using commit signature verification is to other people to know a person and a time when the commit was done. 
+On Github there's three ways to sign commit: GPG or SSH those used by individual users or S/MIME that more suitable for big companies. 
+Repository administrators can required commit signing on a branch to block unsigned commits.
+
+## Summary on merge types
+#### Standart merge
+Combines two branches by creating a merge commit.
+###### Advantages:
+- Provides descriptive and verbose history that helps to have better understanding about code changes
+- Allows us to see a graph of when branches were made using `git log --oneline --graph`
+- no loss of granularity 
+###### Disadvantages:
+- Empty commits are created by merge operation can mess up the history a bit
+- A graph can be too complex when we have a lot of branches
+#### Squash & merge
+Combines all commits from a feature branch into a single commit before merging.
+###### Advantages:
+- Keeps a very clean commit history
+- Can look at a single commit to see a full piece of work, rather than shifting through multiple commits in the log
+###### Disadvantages:
+- Lost of granularity, any useful detail
+#### Rebase & merge
+Reapplies commits from a feature branch onto the base branch.
+###### Advantages:
+- Keeps a very clean commit history
+- Keeps the individual commit granularity
+###### Disadvantages:
+- You have to rebase again if someone was to commit to the base branch before you get to merge
+- Difficult to see which commits relate to which PR or branch
+
+#### Why standart merge
+Standart merge is often preferred in collaborative environments by the reason that it keeps more detailed change history than others. It is suit more for larger teams.
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+## Task 1.1
+
+Before I was able to use htop I had to 
+
+Update my Ubuntu system, run: `sudo apt update && sudo apt upgrade`
+
+
+Install htop on Ubuntu using apt: `sudo apt install htop`
+
+
+To install the latest version of htop on Ubuntu Linux: `snap install htop`
+
+
+I took an hour T.T
+
+
+After all I finaly use `htop` command and get this
+![Screenshot from 2024-09-17 15-14-04](https://github.com/user-attachments/assets/cce5aea9-2007-4695-8d99-2791c6335b83)
+Before I was able to use `iostat` I had to 
+
+
+`sudo apt-get install sysstat`
+
+
+and get this
+![Screenshot from 2024-09-17 15-17-03](https://github.com/user-attachments/assets/98a12586-5a8b-4b0f-baa4-ef23c8fd18b3)
+
+So, because I have a new virtual machine I can identify and document only top 2 most consuming applications for CPU, memory, and I/O usage: firefox and terminal
+
+### 1.2 
+I used `du -h /var | sort -rh | head -n 3` command and get this output: 
+```
+4,2G	/var
+
+3,5G	/var/lib
+
+3,2G	/var/lib/snapd
+```
+Input `df -h  /var` give me this output:
+```
+Filesystem      Size  Used Avail Use% Mounted on
+
+/dev/sda3        24G   14G  9,2G  60% /
+
+```
+
diff --git a/submission8.md b/submission8.md
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+## Task 1
+
+### 1
+![image](https://github.com/user-attachments/assets/c9c16654-f6fb-41d6-93ad-0aa817abe2fc)
+
+### 2
+![image](https://github.com/user-attachments/assets/3a3aa9bc-af79-42dd-8fc9-6cf6ded4aad2)
+
+### 3
+![image](https://github.com/user-attachments/assets/c8d976f7-8a09-4c49-87ed-6850107de5c4)
+
+### 4
+![image](https://github.com/user-attachments/assets/0ada3b32-66c2-4faf-b849-e36bd9909161)
+
+## Task 2
+
+### 1
+![image](https://github.com/user-attachments/assets/c179f39e-c3e5-46a8-9ab2-24b1f74f1a2e)
+
+### 2
+![image](https://github.com/user-attachments/assets/3ee99e1f-3ac5-4852-a557-c687a93c6123)
+
+### 3
+![image](https://github.com/user-attachments/assets/8c7f9f1e-dea9-4ee7-b12f-20e46e21825d)
+
+### 4
+
+sha256:36efe5a3f9e81406839d54a936b13019515e580c3814577dfa235f34f173a44b
+
+### 5
+![image](https://github.com/user-attachments/assets/5b87563c-f8fe-46e8-b5fd-cb7a3963522f)
+
+### 6
+624d681c74f49564a46e509acc7e2a1fd7e7b23c1ff7bcff0691f0fc88061136
+
+### 7
+![image](https://github.com/user-attachments/assets/6920ae7c-22ca-4f4a-8936-49780e47bfb1)
+
+### 8
+![image](https://github.com/user-attachments/assets/b00fa782-5ab5-4444-aa77-c2d103c3659d)
+This command shows me added files and directories