How to check if a user belongs to a group (KSH)?

Shell Programming and Scripting
1

Hi all,

How can I check if a particular user id belongs to a group?

(ie. how to check if the current user `whoami` is part of the a certain group? do i use the group name of group id?)

Thanks in advance

2

Try this:

groups
3

A more crude method:

cat /etc/group | grep `whoami`