1NEWGRP(1) User Commands NEWGRP(1)
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6 newgrp - log in to a new group
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9 newgrp [-] [group]
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12 The newgrp command is used to change the current group ID during a
13 login session. If the optional - flag is given, the user's environment
14 will be reinitialized as though the user had logged in, otherwise the
15 current environment, including current working directory, remains
16 unchanged.
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18 newgrp changes the current real group ID to the named group, or to the
19 default group listed in /etc/passwd if no group name is given. newgrp
20 also tries to add the group to the user groupset. If not root, the user
21 will be prompted for a password if she does not have a password (in
22 /etc/shadow if this user has an entry in the shadowed password file, or
23 in /etc/passwd otherwise) and the group does, or if the user is not
24 listed as a member and the group has a password. The user will be
25 denied access if the group password is empty and the user is not listed
26 as a member.
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28 If there is an entry for this group in /etc/gshadow, then the list of
29 members and the password of this group will be taken from this file,
30 otherwise, the entry in /etc/group is considered.
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33 The following configuration variables in /etc/login.defs change the
34 behavior of this tool:
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36 SYSLOG_SG_ENAB (boolean)
37 Enable "syslog" logging of sg activity.
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40 /etc/passwd
41 User account information.
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43 /etc/shadow
44 Secure user account information.
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46 /etc/group
47 Group account information.
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49 /etc/gshadow
50 Secure group account information.
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53 id(1), login(1), su(1), sg(1), gpasswd(1), group(5), gshadow(5).
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57shadow-utils 4.6 11/08/2018 NEWGRP(1)