Users & Permissions

Users and groups

List all groups and users in groups

getent group

Add a user to a group 

sudo adduser username groupname

which is the same as 

sudo usermod -aG groupname username

Create a new user 

sudo useradd -options_here username

Options available:

• m = create home directory

Permissions

To see if a particular user can run a command 

sudo -u USER COMMAND

To change a folders permission 

sudo chmod -R u+rwx,g+rwx,o-rwx /path/to_folder

or change ownership

sudo chown -R NEW_USER:NEW_GROUP FOLDER_NAME

-R = recursive

 Note: user or group can be left blank

Passwords

To change the curretly logged in user's password passwd 

To change a different users password sudo passwd USERNAME