Ssh Config Examples

Content

# Useful ~/.ssh/config examples

Host *
  AddKeysToAgent yes
  IdentitiesOnly yes

# Short alias
Host box
  HostName 203.0.113.10
  User deploy
  IdentityFile ~/.ssh/id_ed25519
  Port 22

# Jump host (bastion)
Host internal
  HostName 10.0.0.12
  User app
  ProxyJump bastion

Host bastion
  HostName bastion.example.com
  User jump
  IdentityFile ~/.ssh/id_ed25519

# GitHub with a dedicated key
Host github.com
  HostName github.com
  User git
  IdentityFile ~/.ssh/id_ed25519_github

## Quick checks
ssh -G box                 # print effective config
ssh-add -l                 # list loaded keys
ssh -v box                 # verbose connect debug

Keep private keys chmod 600 and never commit them.