After years of managing not only my server but numerous others as well, I've learned quite a few nice SSH commands that can save loads of time.

First

Code:
tar -cvvf name.tar files
This command will create a compressed folder named "name.tar" of all the files/folders you list (replace files with things like "public_html")

Code:
tar -xvf name.tar
This will extract the tar you made in the previous step

Code:
scp user@ip.add.res.ss:/directory
SCP will make moving files between servers a breeze. This command usually saves loads of time from downloading files from FTP, then reuploading.

Code:
service cpanel restart
Restart cPanel and a load of other services that cPanel depends on

Code:
service httpd restart
Restart the apache web server

Code:
service mysql restart
Restarts mysql server

(You can replace the "restart" with either stop or start depending if the service is running or if you need to start/stop it.

That about wraps up most the common ones I use, of course there are a load of others as well such as wget, yum and more but we'll save those for a later post.