ssh script returns 255 error

Question

In my code I have the following to run a remote script.

ssh root@host.domain.com \"sh /home/user/backup_mysql.sh\"

For some reason it keeps

Answer 1

It can very much be an ssh-agent issue. Check whether there is an ssh-agent PID currently running with eval "$(ssh-agent -s)"

Check whether your identity is added with ssh-add -l and if not, add it with ssh-add .

Then try again your ssh command (or any other command that spawns ssh daemons, like autossh for example) that returned 255.