CMCDragonkai/ssh_configuration_conditionals.md

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SSH: Configuration Conditionals

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ssh_configuration_conditionals.md

SSH Configuration Conditonals

It's possible to conditionally set options in the ~/.ssh/config file.

For example, below shows the usage of a conditional setting of ControlMaster, which allows sharing of the SSH network port. But it doesn't work on Windows.

At ~/.ssh/config:

Match exec "~/.ssh/is-linux.sh"
    ControlMaster auto
    ControlPath /tmp/ssh-control:%h:%p:%r

At ~/.ssh/is-linux.sh:

#!/usr/bin/env bash

kernel_name="$(uname --kernel-name)"
[ "${kernel_name#*Linux*}" != "$kernel_name" ] && exit 0 || exit 1

Make sure to run chmod 700 ~/.ssh/is-linux.sh.