How to fix request failed on channel 0

Question

When I want to connect to my server like this

ssh -a username@my-server.de -p 22

it gives me two error messages:

PTY alloca         


        

Answer 1

Just add these lines to your /etc/mtab and /etc/fstab, and reboot the system.

none    /dev/pts    devpts    defaults    0    0