<div>
Thanks. I didn't realize that adding someone to a new group would essentially NOT take affect until after a subsequent login. I guess caching the user's groups at login is a reasonable thing to do (rather than having to re-check everytime a user attempts to access a file).<br />
<br />
While &quot;id&quot; and &quot;newgrp&quot; are interesting, what I really needed to do was login again (which I have a habit of not doing--thanks to vnc).<br />
<br />
Thanks again!
</div>


Thanks. I didn't realize that adding someone to a new group would essentially NOT take affect until after a subsequent login. I guess caching the user's groups at login is a reasonable thing to do (rather than having to re-check everytime a user attempts to access a file).

While "id" and "newgrp" are interesting, what I really needed to do was login again (which I have a habit of not doing--thanks to vnc).

Thanks again!

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<div class="content wysiwyg-content">
I want a user to be able to write into the /var/lock directory under Linux Red Hat 7.1.<br />
<br />
foo&gt; ls -l /var | grep lock<br />
drwxrwxr-x &nbsp; &nbsp;5 root &nbsp; &nbsp; uucp &nbsp; &nbsp; &nbsp; &nbsp; 4096 Jun 29 04:02 lock<br />
<br />
Since the group for this directory is 'uucp' I added the user freddie to the 'uucp' group.<br />
<br />
foo&gt; grep uucp /etc/group<br />
uucp:x:14:uucp,freddie<br />
<br />
But I still can NOT write to that directory. (See below)<br />
<br />
foo&gt; touch /var/lock/foobar<br />
touch: creating `/var/lock/foobar': Permission denied<br />
<br />
Any ideas? I have the same problem with writing to the serial port /dev/ttyS0<br />

</div>
</div>


I want a user to be able to write into the /var/lock directory under Linux Red Hat 7.1.

foo> ls -l /var | grep lock
drwxrwxr-x    5 root     uucp         4096 Jun 29 04:02 lock

Since the group for this directory is 'uucp' I added the user freddie to the 'uucp' group.

foo> grep uucp /etc/group
uucp:x:14:uucp,freddie

But I still can NOT write to that directory. (See below)

foo> touch /var/lock/foobar
touch: creating `/var/lock/foobar': Permission denied

Any ideas? I have the same problem with writing to the serial port /dev/ttyS0


Permissions not working as expected

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.