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/usr/bin/newgrp [-| -l] [group]
newgrp [argument]
*newgrp [argument]
+newgrp [argument]
Any variable that is not exported is reset to null or its default value. Exported variables retain their values. System variables (such as PS1, PS2, PATH, MAIL, and HOME), are reset to default values unless they have been exported by the system or the user. For example, when a user has a primary prompt string (PS1) other than $ (default) and has not exported PS1, the user's PS1 is set to the default prompt string $, even if newgrp terminates with an error. Note that the shell command export (see sh(1) and set(1)) is the method to export variables so that they retain their assigned value when invoking new shells.
With no operands and options, newgrp changes the user's group IDs (real and effective) back to the group specified in the user's password file entry. This is a way to exit the effect of an earlier newgrp command.
A password is demanded if the group has a password and the user is not listed in /etc/group as being a member of that group. The only way to create a password for a group is to use passwd(1), then cut and paste the password from /etc/shadow to /etc/group. Group passwords are antiquated and not often used.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a variable assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed.
On this man page, ksh93(1) commands that are preceded by one or two + (plus signs) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. They are not valid function names.
5. Words, following a command preceded by ++ that are in the format of a variable assignment, are expanded with the same rules as a variable assignment. This means that tilde substitution is performed after the = sign and field splitting and file name generation are not performed.
Change the environment to what would be expected if the user actually logged in again as a member of the new group.
A group name from the group database or a non-negative numeric group ID. Specifies the group ID to which the real and effective group IDs is set. If group is a non-negative numeric string and exists in the group database as a group name (see getgrnam(3C)), the numeric group ID associated with that group name is used as the group ID.
An error occurred.
System group file
System password file
| ATTRIBUTE TYPE ATTRIBUTE VALUE |
| Interface Stability Committed |
| Standard See standards(7). |
| ATTRIBUTE TYPE ATTRIBUTE VALUE |
| Interface Stability Uncommitted |