# NEWGRP - log in to a new group - man(1) - [phpMan]

> **TLDR:** Switch primary group membership.
>
- Change user's primary group membership:
  `newgrp {{group_name}}`
- Reset primary group membership to user's default group in `/etc/passwd`:
  `newgrp`

*Source: tldr-pages*

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[_NEWGRP_(1)](https://www.chedong.com/phpMan.php/man/NEWGRP/1/markdown)                                   User Commands                                  [_NEWGRP_(1)](https://www.chedong.com/phpMan.php/man/NEWGRP/1/markdown)

## NAME
       newgrp - log in to a new group

## SYNOPSIS


       **newgrp **[-] [_group_]

## DESCRIPTION
       The **newgrp **command is used to change the current group ID during a login session. If the
       optional **- **flag is given, the user's environment will be reinitialized as though the user had
       logged in, otherwise the current environment, including current working directory, remains
       unchanged.

       **newgrp **changes the current real group ID to the named group, or to the default group listed
       in /etc/passwd if no group name is given.  **newgrp **also tries to add the group to the user
       groupset. If not root, the user will be prompted for a password if she does not have a
       password (in /etc/shadow if this user has an entry in the shadowed password file, or in
       /etc/passwd otherwise) and the group does, or if the user is not listed as a member and the
       group has a password. The user will be denied access if the group password is empty and the
       user is not listed as a member.

       If there is an entry for this group in /etc/gshadow, then the list of members and the
       password of this group will be taken from this file, otherwise, the entry in /etc/group is
       considered.

## CONFIGURATION
       The following configuration variables in /etc/login.defs change the behavior of this tool:

### SYSLOG_SG_ENAB (boolean)
           Enable "syslog" logging of **sg **activity.

## FILES
       /etc/passwd
           User account information.

       /etc/shadow
           Secure user account information.

       /etc/group
           Group account information.

       /etc/gshadow
           Secure group account information.

## SEE ALSO
       [**id**(1)](https://www.chedong.com/phpMan.php/man/id/1/markdown), [**login**(1)](https://www.chedong.com/phpMan.php/man/login/1/markdown), [**su**(1)](https://www.chedong.com/phpMan.php/man/su/1/markdown), [**sg**(1)](https://www.chedong.com/phpMan.php/man/sg/1/markdown), [**gpasswd**(1)](https://www.chedong.com/phpMan.php/man/gpasswd/1/markdown), [**group**(5)](https://www.chedong.com/phpMan.php/man/group/5/markdown), [**gshadow**(5)](https://www.chedong.com/phpMan.php/man/gshadow/5/markdown).

shadow-utils 4.13                            05/30/2024                                    [_NEWGRP_(1)](https://www.chedong.com/phpMan.php/man/NEWGRP/1/markdown)