Adding an existing user to an existing group isn't working with usermod -a -G
7783
Adding user to a group - Why had to reboot?
48736
How can I find out if the current user is in a specific group?
11036
Changed permissions of / to user
144629
From command line on macOS, how to add a user group to the Sharing and Permissions list for a directory?
91067
UserPrincipals.GetAuthorizationGroups An error (1301) occurred while enumerating the groups. After upgrading to Server 2012 Domain Controller
1263
How can one link / merge / combine / associate two accounts / users? (Anonymous / unregistered / cookie, or Google / Facebook / registered)
106009
Using AddJoin_management gives ERROR 000840?
86049
Cannot unlock Users & Groups settings
68980
Check if user is in a specified group
37557
How to add a user to sudoers file?
158722
how to verify users are in group
153677
Is there a reason why 'owner' permissions exist? Aren't group permissions enough?
67024
What does "chmod +x " do and how do I use it?
18745
`who am i` after `su` not showing new user id?
156982
How to restore/add previous user account
57189
Adding more than one author with different affiliation
10843
How to allow to run su instantly after I added the user to the appropriate group