SSH Commands cheatsheet

$ ssh username@hostname
$ ssh -p 2222 username@hostname    # custom port
$ ssh host.example.com            # using config
$ ssh -v username@hostname        # verbose output

$ ssh -i ~/.ssh/key.pem hostname   # identity file
$ ssh -A hostname                  # forward auth agent
$ ssh -X hostname                  # X11 forwarding
$ ssh -Y hostname                  # trusted X11
$ ssh -f hostname                  # background

$ ssh-keygen -t rsa -b 4096
$ ssh-keygen -t ed25519
$ ssh-keygen -t rsa -C "comment"
$ ssh-keygen -f ~/keys/special

$ ssh-copy-id user@hostname
$ ssh-add ~/.ssh/id_rsa
$ ssh-add -l                    # list keys
$ ssh-add -D                    # delete all
$ ssh-keygen -R hostname        # remove from known_hosts

$ ssh -L 8080:localhost:80 host
$ ssh -L 3000:internal:3000 host
$ ssh -L "*:8080:localhost:80" host

$ ssh -R 8080:localhost:80 host
$ ssh -R 3000:internal:3000 host
$ ssh -R "*:8080:localhost:80" host

$ ssh -D 9999 hostname
$ ssh -D 0.0.0.0:9999 hostname
$ ssh -D 9999 -N hostname        # proxy only

$ scp file.txt user@host:~/path/
$ scp -r folder/ user@host:~/path/
$ sftp user@hostname
$ rsync -av -e ssh ~/local/ user@host:~/path/

# ~/.ssh/config
Host nickname
    HostName hostname
    User username
    Port 2222
    IdentityFile ~/.ssh/key.pem

$ ssh -o "StrictHostKeyChecking=no" host
$ ssh -o "UserKnownHostsFile=/dev/null" host
$ ssh -o "ServerAliveInterval=60" host
$ ssh -o "ServerAliveCountMax=3" host