list groups of user code example
Example 1: how to check user in group linux
# to see the group joined by current user
$ id
groups
groups {USERNAME}
groups vivek
Example 2: list des group linux
cat /etc/group | awk -F: '{print $ 1}'
# to see the group joined by current user
$ id
groups
groups {USERNAME}
groups vivek
cat /etc/group | awk -F: '{print $ 1}'