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

unmount and mount /dev/pts worked for me

umount /dev/pts

mount devpts /dev/pts -t devpts

Reference: http://www.iitk.ac.in/LDP/LDP/lfs/5.0/html/chapter06/proc.html