I want to exclude a single user from backups. How can I disable backups for a cPanel user using the WHM interface or the command line?
Log into WHM.
Navigate to Backup User Selection.
Enable or disable backups for the desired users.
To disable backups for a single user via the command-line, use the modifyacct API:
whmapi1 modifyacct user=example backup=0
Backup User Selection interface (cPanel Docs)