Test that you can connect to the relevant GitLab server. If the repo you want to talk to lives on CZ GitLab (https://lc.llnl.gov/gitlab), run ssh -p7999 git@czgitlab; if the repo lives on RZ GitLab (https://rzlc.llnl.gov/gitlab), run ssh -p7999 git@rzgitlab.

1. You may be prompted “Are you sure you want to continue connecting (yes/no)?” Respond “yes”.
2. A successful connection will return something like 
PTY allocation request failed on channel 0
Welcome to GitLab, @janeh!
Connection to czgitlab closed.”