Please if you can help me when I made the backup in the "root" /home the size of the root space is not big enough so I try to make the backup on another place "/backup" but the following message appears : (
-bash: file_name : Prmission denied)
You wrote you use sudo. The command
You could write a script, put the command in it and sudo the whole script or construct a one-liner like
if you are allowed to read
You may not have permission to (a) read files in /home, especially if its a shared host, or (b) write to /backup. If you run it as root (using either su or sudo), you should be able to run the command.
EDIT: When you run sudo, what you'll want to do is