ssh

ssh is used to remotely login to other computers and execute commands.

Usage

• ssh [options] [destination] [command]

Options

• -p Specify the port to connect to.
• -q Quiet mode.
• -X Enables X11 forwarding.

Key-based SSH

Use public key authentication instead of just passwords.

• Generate public and private SSH keys on the client.

  • If it doesn't already exist, mkdir ~/.ssh
  • ssh-keygen -t rsa -b 4096
  • Public key: ~/.ssh/id_rsa.pub
  • Private key: ~/.ssh/id_rsa

• Transfer the public key.

  • If the host is currently using password authentication, ssh-copy-id user@host
  • Else, copy the public key file to the host and add it manually to ~/.ssh/authorized_keys

Page added on 2021-10-18

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