Question

This is probably a dup (but did not find it..)

When you type ls -l in unix you get output like this:

% ls -l
total 48
-rwxr--r--   ... change*
-rwxrwxrwx   ... checkVersion*
-rwx------   ... info*

I know that the first group of rwx sets the users permisions and the last group sets “everyone else’s” permisions. I think that the second rwx group sets the “group”s permissions.

How can I tell people who are in the group? What group am I in? Can I create new groups? Where are the groups defined on my machine?

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Edit: Can I modify groups by modifying the /etc/groups file or do I need to do it with a command?

Answer 1

To know which groups you are in type

groups

on the console.

The groups members are listed in /etc/group