1. To know the free space in all mounted file system: df -h (Shows used and free space in all mounted file systems)
2. List all rules in iptables: iptables -L
3. Restart apache: service httpd restart
4. Restart MySQL: service mysql restart
5. Restart exim: service exim restart
6. Restart Cpanel: service cpanel restart
7. To upgrade cpanel version: /scripts/upcp --force.
8. Backup MySQL Database Shell Command:
mysqldump -u username -p password databasename > databasefile.sql (backup MySQL database to databasefile.sql).
9. Restore MySQL Database Shell Command:
mysqldump -u username -p password databasename > databasefile.sql :Restore a MySQL databse from databasefile.sql.