SSH connection without password
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Title is a little bit wrong, the password must entered once per session
Procedure found here : ssh configuration (in french)
1) On lheppc56 :
ssh-keygen -t dsa -b 1024 (enter a password)
chmod 600 ~/.ssh/id_dsa.pub ~/.ssh/id_dsa
scp ~/.ssh/id_dsa.pub scanner@lheppc57:~/.ssh/authorized_keys
2) On lheppc57 :
chmod 400 ~/.ssh/authorized_keys
home directory (/home/scanner on lheppc57) must have permission 755 otherwise does not work !
3) On lheppc56 :
ssh-agent /bin/bash ssh-add (enter password given in part 1)
4) No more password is needed to connect on lheppc57 till ssh-agent is running