WYNTK: UNIX System Admininistrator

Use ls -lg to find out to what group a file belongs.

On some versions of UNIX, typing ls -l shows you who owns the file, but not the name of the group that the file belongs to. To see the name of the group, run ls -lg on the file.

    % ls -lg ch01
    total 396
    -rw-r---- 1 lois sales 95232 Oct 20 11:48 ch01

You’ll see that after the name of the owner (lois) is the name of the group, in this case sales.

Check group memberships now and then

	As a manager, it doesn’t hurt to periodically look at who is on your group file permissions (as well as group mail aliases, etc.) You want to make sure that people who moved to another department no longer have file permissions, and that newcomers can read and save the files they need. This may be a system administrator’s job, but they’re busy and can’t always keep track of employees switching positions. And you can spot an anomaly on the group list faster than the administrator can.
	--Linda Lamb

On System V-derived versions of UNIX, the group is automatically shown with ls -l. If your ls -l shows groups automatically, then you don’t need to supply the g option.