SSH
Generate local key to access remote host
On client:
- ssh-keygen -t dsa # with empty password
- cd ~/.ssh
- cat id_dsa.pub # public key
On SSHserver:
- mkdir -p ~/.ssh
- cd /home/userx/.ssh
- vi authorized_keys # paste the id_dsa.pub (public key) content generated on the client
- chmod 0600 authorized_keys
Login from the client with ssh userx@remote.example.org should ask for not password. Useful to invoke commands remotely using ssh
Copy file to SSH server listening on different port
scp -P 2222 filex userx@sshserver.example.org:/home/userx
Add listening ports on Ubuntu
Edit file /etc/ssh/sshd_config to set port 22 and 1234
Port 22 Port 1234
Restart service with service ssh restart