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