newgrp - is used to change the current group ID (GID) during a login
session for a user
$ newgrp [-] [group]
$ newgrp ilugc
Attempts to log in to the group ilugc
Attempts to log in to the group ilugc , if successful re-initializes the
user environment.
$ newgrp - ilugc
To change the real group ID back to your original login group
$ newgrp
regards,
T.Dhanasekar
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