Ssh schnelleinstieg

Verbindungsaufbau vereinfacht

Server

Installation

• apt-get install ssh

Konfig Verzeichnis

/etc/ssh

Konfigurationsdatei

Beispiel

• cat /etc/ssh/sshd

Port 22
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key
PermitRootLogin prohibit-password
ChallengeResponseAuthentication no
UsePAM yes
X11Forwarding yes
PrintMotd no
AcceptEnv LANG LC_*
Subsystem sftp  /usr/lib/openssh/sftp-server
PasswordAuthentication yes

start,stop,restart,status

• systemctl start ssh
• systemctl stop ssh
• systemctl status ssh
• systemctl restart ssh

Client

Konfigurations Verzeichnis

/etc/ssh

Heimat Verzeichnis

~/.ssh

remote login

• ssh harald@rechner
• ssh -l harald rechner
• ssh -p 22 -l harald rechner

Ausführen eines Programs auf einem anderem Rechner

• ssh harald@rechner date
• ssh harald@rechner pwd
• ssh harald@rechner ls -l

local to remote

file

• scp /etc/hosts harald@rechner:/tmp

directory

• scp -r /bin harald@rechner:/tmp

Schlüsselpaar erstellen

• ssh-keygen

Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:EuZ8a0Ovlq5ZdXXOsUUMH2pPT3NzD8k8bbfXkjq9nsg root@unaris
The key's randomart image is:
+---[RSA 2048]----+
|              .+.|
|             o.=o|
|      o      oB=@|
|     + .    ..oX#|
|      + S . . o+B|
|       + + . o ..|
|        =.. o .  |
|       +oo . o o |
|      o+o   E.+  |
+----[SHA256]-----+