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Oracle Tips by Burleson |
Logging on to another group
Every Linux user can be assigned to multiple groups so they
can obtain access to whatever files and directories they need to
perform their work. You can find out what groups you have
access to by using the id command. When a user logs on to the
system, however, they are assigned to their primary group as
specified by the Systems Administrator when the user ID was
created.
Since Linux only allows you to be logged into one group at a
time, there must be a command that allows you to change the
group you are logged into whenever you need access to another
group’s files or want the files that you create to belong to
another group. The command that allows you to change
groups is newgrp. The newgrp command accepts a single
parameter consisting of the group name that you want to log
into.
The following example shows the use of the id command to
determine the group you are currently logged into as well as all
of the groups that you are allowed to access. In the example,
the current user id (uid) is tclark and the current group (gid) is
also tclark. The eligible groups are tclark and authors.
Determining your current group and accessible groups using
the id command
$ id
uid=503(tclark) gid=504(tclark)
groups=504(tclark),506(authors)
The next example shows how to switch from the current group
of tclark to the authors group.
Logging into a different group using the newgrp command
$ id
uid=503(tclark) gid=504(tclark)
groups=504(tclark),506(authors)
$ newgrp authors
$ id
uid=503(tclark) gid=506(authors)
groups=504(tclark),506(authors)
The above book excerpt is from:
Easy Linux
Commands
Working Examples of Linux Command Syntax
ISBN:
0-9759135-0-6
Terry Clark
http://www.rampant-books.com/book_2005_1_linux_commands.htm |
