Ssh

Allgemein

Debug Ausgaben

ssh -v ....

Authentifizierung über Public-Keys

Keypaar erstellen

 ssh-keygen -t rsa

Öffentlichen Schlüssel auf den Server kopieren

 ssh-copy-id -i ~/.ssh/id_rsa.pub user@server

 ssh-copy-id '-p 345 -i ~/.ssh/id_rsa.pub user@server'      // falls port anders

auf den Server einloggen

 ssh user@server

Veralteten SSH-Schlüssel aus der known_hosts entfernen Fehlerausgabe:

 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
 @    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
 IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
 Someone could be eavesdropping on you right now (man-in-the-middle attack)!
 It is also possible that a host key has just been changed.
 The fingerprint for the RSA key sent by the remote host is
 aa:bb:cc:dd:ee:ff:gg:bd:f7:92:79:1c:cc:3b:af:11.
 Please contact your system administrator.
 Add correct host key in /home/sn/.ssh/known_hosts to get rid of this message.
 Offending RSA key in /home/sn/.ssh/known_hosts:7
 RSA host key for [78.46.110.16]:262 has changed and you have requested strict checking.
 Host key verification failed.

Lösung

 sed -i '7d' ~/.ssh/known_hosts

SSH Agent

SSH Agent zum speichern von Passwörtern:

im Terminal (so muss nur 1 das Passwort vom Key eingegeben werden):

 ssh-add