SSH: Bad configuration option: usekeychain
I synchronise my .ssh/config file between (most of) my laptops, including some Linux and macOS ones. On Mac, it’s quite nice to be able to use the UseKeychain option to store SSH passphrases in the secure keychain thing.. until you then try to use the same config file on Linux that is..! Thankfully, the IgnoreUnknown option can be used to tell Linux to stop whining about a bad configuration option, like so: ...