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autossh: refresh (#5718)

manned-org
bl-ue 2021-04-16 21:42:33 -04:00 committed by GitHub
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pages/common/autossh.md
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# autossh
> Runs, monitors and restarts SSH connections.
> Auto-reconnects to keep port forwarding tunnels up. Accepts all ssh flags.
> More information: <https://harding.motd.ca/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>.
- Open an SSH session, restarting when a monitoring port fails return data:
- Start an SSH session, restarting when a monitoring port fails to return data:
`autossh -M {{monitor_port}} {{ssh_command}}`
`autossh -M {{monitor_port}} "{{ssh_command}}"`
- Open an SSH session which forwards a local port to a remote one, restarting if necessary:
- Forward a local port to a remote one, restarting when necessary:
`autossh -M {{monitor_port}} -L {{local_port}}:localhost:{{remote_port}} {{user}}@{{host}}`
- Fork before executing ssh (runs in the background) and don't open a remote shell:
- Fork `autossh` into the background before executing `ssh` and don't open a remote shell:
`autossh -f -M {{monitor_port}} -N {{ssh_command}}`
`autossh -f -M {{monitor_port}} -N "{{ssh_command}}"`
- Run autossh in the background, with no monitoring port, instead relying on SSH keep-alives every 10 seconds to detect failure:
- 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}}`
`autossh -f -M 0 -N -o "ServerAliveInterval 10" -o "ServerAliveCountMax 3" "{{ssh_command}}"`
- Run autossh in the background, with no monitoring port, no remote shell, exiting if the port forward fails:
- 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 autossh in the background with debug output logged to a file and ssh verbose output logged to a second file:
- Run in the background, logging `autossh` debug output and `ssh` verbose output to files:
`AUTOSSH_DEBUG=1 AUTOSSH_LOGFILE={{log_file}} autossh -f -M {{monitor_port}} -v -E {{ssh_log_file}} {{ssh_command}}`
`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}}`