The newgrp command in Linux is used to change the current group ID to a new group ID. Here are some examples of using the newgrp command:

1. Change the current group ID to the group “developers”:

newgrp developers

2. Change the current group ID to the group “developers” and run a command with that group ID:

newgrp developers -

3. Change the current group ID to the group “developers” and run a command with that group ID and login shell.

newgrp developers -l

4. Change the current group ID to the group “developers” and run a command with that group ID and login shell and environment variables

newgrp developers -l -e

5. Change the current group ID to the group “developers” and run a command with that group ID and login shell and environment variables and then exit.

newgrp developers -l -e -

Note: The newgrp command will prompt for a password if the user is not a member of the specified group or if the group has a password set. Also, you must be a member of the group to change the group ID to that group.

It’s important to note that the newgrp command is used to change the group ID of the current shell, this change will be reflected only in the current shell and any new process that is started from this shell, it will not affect any other running shells or processes.

Other Linux Commands

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76. groups Command
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230. Linux Commands and Examples