Java Reference
In-Depth Information
NOTE
There are two strategies that Linux distributions follow for assigning a default
group to a new user. One is to put all users into a group called
staff
or some
such. This is widely considered a security risk since it often leads to making files
accidentally readable or writable by all users on the system. The more common
method is to create a group for each user when the user is created.
TIP
If you get in the habit of creating groups, you might want to assign the numbers
systematically: 500-599 groups for programs, 600-699 groups for program in-
stallation, 700-799 groups for company departments to allow them to control
their own Web content, and so on.
2.
Change group ownership of
/usr/local
.
Odds are,
/usr/local
already exists on your system. It may even
have several programs installed in it. You must give the group ownership
over everything in
/usr/local
and below. The
chgrp
command changes
the group owner of files, and the
-R
argument says to do so recursively:
# cd /usr/local
# chgrp -R local .
At this point, everything in
/usr/local
and below is group-owned
by the
local
group.
3.
Set group permissions on
/usr/local
.
Basically, you want the group to be able to read and write everything
in
/usr/local
. To do this, you need to change the permissions on all the
files with the
chmod
. As with
chgrp
, this command takes a
-R
argument
that recursively walks the directory tree. We need to give everyone in the
group read and write permission on all the files:
# chmod -R g+rw .
