list user groups linux code example

Example 1: linux add user to group

# Change the primary group a user is assigned to, note the -g here.
# When you use a lowercase g, you assign a primary group. When you 
# use an uppercase -G you assign a new secondary group.
usermod -g groupname username

Example 2: check which users are part of a group linux

grep 'group-name-here' /etc/group

Example 3: check user group console linux

groups
groups userName-Here

Example 4: list des group linux

cat /etc/passwd | awk -F: '{print $ 1}'

Example 5: linux user groups

groups $username