As described in many other posts, after upgrading to MacOS Sierra I modified the ssh config file like so:
Host me
HostName login.hpc.ugent.be
User vscxxxxx
Port 22
Host *
AddKeysToAgent yes
UseKeychain yes
Still I get the following error:
$ssh -Y vscxxxxx@login.hpc.ugent.be
/Users/manfredo/.ssh/config: line 8: Bad configuration option: usekeychain
/Users/manfredo/.ssh/config: terminating, 1 bad configuration options
What am I missing?
Just remove the UseKeychain yes line from your configuration. The update broke existing setup by removing this option.
UseKeychain yes or usekeychain yes give no errors.
– Jari Keinänen
Mar 1 '17 at 17:32
Apple's documentation on OpenSSH updates in macOS 10.12.2 states that:
If you are sharing your ssh configuration with systems running older versions of OpenSSH that don't understand the UseKeychain option, you can specify the IgnoreUnknown option to keep your configuration compatible with both new and old versions.
So the trick is that in your ssh config file, add IgnoreUnknown UseKeychain like below:
Host *
AddKeysToAgent yes
IgnoreUnknown UseKeychain
UseKeychain yes
If you specify /usr/bin/ssh for the commands, it works. The default path in 10.12 puts /usr/local/bin at the top so any other version of ssh will not work with that option, since it's specific to the mac system.
nano ~/.bash_profile then make sure /usr/bin is before /usr/local/bin if they aren't in your $PATH declaration at all simply add both with them in that order. Something like export PATH="~/bin:/usr/bin:/usr/local/bin/:$PATH then source ~/.bash_profile this resolved it for me
– abc123
May 30 '17 at 13:45
ssh -Vandtype ssh? Or do you know whether you have non-system-default ssh installed? – Jari Keinänen Mar 1 '17 at 17:31