groupadd — Create a new group
Summary :
The groupadd command creates a new group account using the values
specified on the command line and the default values from the system.
Example:
# groupadd newgrp — Create a new group
# groupadd -g 600 newgrp — Create newgrp with specified Group ID.
# groupadd -f newgrp — Force flag. Don’t show error message.
Read: man groupadd