# autossh
# Run, monitor and restart SSH connections.
# Auto-reconnects to keep port forwarding tunnels up. Accepts all `ssh` flags.
# More information: <https://www.harding.motd.ca/autossh>.
# Start an SSH session, restarting when a monitoring port fails to return data:
autossh -M monitor_port "ssh_command"
# Forward a local port to a remote one, restarting when necessary:
autossh -M monitor_port -L local_port:localhost:remote_port user@host
# Fork `autossh` into the background before executing `ssh` and don't open a remote shell:
autossh -f -M monitor_port -N "ssh_command"
# Run in the background, with no monitoring port, and instead send SSH keep-alive packets every 10 seconds to detect failure:
autossh -f -M 0 -N -o "ServerAliveInterval 10" -o "ServerAliveCountMax 3" "ssh_command"
# Run in the background, with no monitoring port and no remote shell, exiting if the port forward fails:
autossh -f -M 0 -N -o "ServerAliveInterval 10" -o "ServerAliveCountMax 3" -o ExitOnForwardFailure=yes -L local_port:localhost:remote_port user@host
# Run in the background, logging `autossh` debug output and `ssh` verbose output to files:
AUTOSSH_DEBUG=1 AUTOSSH_LOGFILE=path/to/autossh_log_file.log autossh -f -M monitor_port -v -E path/to/ssh_log_file.log ssh_command
$
cheat.sh
tldr