newgrp
change to a new group
TLDR
Change user's primary group membership
$ newgrp [group_name]
Reset primary group membership to user's default group in /etc/passwd
$ newgrp
SYNOPSIS
newgrp [group]
DESCRIPTION
newgrp changes the group identification of its caller, analogously to login(1). The same person remains logged in, and the current directory is unchanged, but calculations of access permissions to files are performed with respect to the new group ID.
If no group is specified, the GID is changed to the login GID.
FILES
/etc/group, /etc/passwd
AUTHORS
Originally by Michael Haardt. Currently maintained by
REPORTING BUGS
For bug reports, use the issue tracker at <https://github.com/karelzak/util-linux/issues>.
AVAILABILITY
The newgrp command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.
SEE ALSO
login(1), group(5)