Email forwarders in cPanel are stored in file /etc/valiases/domain *Where domain is the domain name under which email forwarders are created. To bulk delete email forwarders in cPanel you can edit this file with your favorite text...

in cPanel mailbox quota for all email accounts under a single domain name is stored in a file named quota. To bulk change mailbox quota for all email accounts under one domain you can modify the quota file located in the following path:...

Here is how to mass change the “Default Mail Address” for all domains (existing accounts) in the server to a specific email address (user@example.com).

sed "s/^\*:.*/user@example.com/g" -i /etc/valiases/*

If you are looking to change the Ftp port on your server from 21 to a non-standard port say 2121, you need tweak the ‘bind’ option in the Ftp configuration file.  On a cPanel server with pure-ftp as a Ftp server, you need to edit...