...you would already be in the git home directory... therefore the location src/gl-system-install would make sense... if you're ANYWHERE else in the system, the call will fail.
Edit: Going over the short article again... it seems to assume you've configured su to change you from your current directory to the home directory of the user you've logged in as. This isn't the default behavior of su. So you'll have to either log off and log back in to be in the right home directory or just cd into the right home directory (or change the default behavior of su).
Last Visit: 31-Dec-99 19:00 Last Update: 27-Dec-14 12:42