Not able to change default group for user with `sudo usermod -g`
1291
I added a user to a group, but group permissions on files still have no effect
86049
Cannot unlock Users & Groups settings
154957
Group permissions allow, but still get permission denied
78746
Getting new files to inherit group permissions on Linux
4849
Permission denied to change gid(group) of a file I own
66222
'sudo' not working after changing the permissions of '/usr' directory
117033
Setting the PATH so it applies to all users, including root/sudo
89489
How to restore default group/user ownership of all files under /var?
42702
Can not change permissions while root
129198
Group permissions for root not working in /tmp
60817
Ubuntu 17.10: Disable user list in GDM
809
Changing from user to superuser
26787
Precedence of user and group owner in file permissions
102089
After adding a group, logout+login is not enough in 18.04?
10843
How to allow to run su instantly after I added the user to the appropriate group
11036
Changed permissions of / to user
72261
How to set path for sudo commands