I have found Termux to be pretty good. It gives you linux-ish environment (bash, home dir, packages etc.) and actual OpenSSH and not just Dropbear.
You can run unison on Android as root or non-root user. I would prefer the latter, but you may run into this problem:
Fatal error: Warning: the archives are locked.
If no other instance of unison is running, the locks should be removed.
The file /data/data/com.termux/files/home/.unison/lk444065e903864397d2dfd6494cff03d2 on host localhost should be deleted.
Please delete lock files as appropriate and try again.
I had to disable SELinux to workaround this problem, but it is rather dirty.
# getenforce
Enforcing
# setenforce 0
# getenforce
Permissive
You may not have high enough rights to set permissions, in that case add this to your config file:
perms = 0
dontchmod = true
You can symlink other directories to your home dir, which may be located in strange places depending on your ssh server (/data/data/com.termux/files/home for Termux).
ln -s /storage/emulated/0 ~/storage
You may need to:
- manually give permission to read/write main storage to the ssh app in your Android's settings; in my case I granted the rights to Termux
unisonwill follow the symlink and sync the contents regardless yourfollowinstructions. Howeverunison-fsmonitorwill not descent into the symlinked directory if you won't addfollow = Path ./in your configuration.
# Ignore permissions
perms = 0
dontchmod = true
# Let unison-fsmonitor to follow symlinked root
follow = Path ./