groups - print the groups a user is in
groups
cat /etc/group - list groups
cat /etc/group
getent group - list groups
getent group
Group by
lsgroup
id
chown
chgrp
chmod
stat
USER
GID, chgrp, groups
sudo
visudo
useradd
userdel
usermod
passwd
groupadd
groupdel
sudo --help
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