Database Connection Issues - Mysql.service won't start
@Naline ok lets see if we can free up some bits. Look in /images/dev for any directories that look like mac addresses.
ls -la /images/dev
If there are any directories in there with a mac looking file name, those are botched uploads you can delete the entire directory without fear. Lets see the output before I give you the command.
@Naline Yep you are sitting at 100% on your root partition (think drive being 100% full).
These are the results:
df -hgive you? One reason why mysql would fail to start is being out of disk space to boot mysql.
Edit: well heck if I would have read your entire text of your first post you already suggested being out of disk space. The df program will tell us.