First of all login to your server via SSH as the root user and for restoring an account, make sure that you have a backup available in one of the following locations or your backup location for example, /backupdisk:
/, /home, /home2, /home3, /root, /tmp, /usr, /usr/home, /var/tmp, /web
To backup an account (in this example, username is rapid):
# /scripts/pkgacct rapid
To restore an account (in this example, username is rapid):
# /scripts/restorepkg rapid
This is the easiest way of backingup and restoring cPanel web hosting accounts via the command line interface.