<div dir="ltr">I was reading kind of fast, but I'm not sure you pointed out any specific ill effects. I'd expect the kernel to page to disk the pages in RAM associated with the unused sessions. So once all the matlab state (etc.) is on the swap partition, there'd be little cost associated with a stale login as long as you have plenty of swap space. Maybe everything is already fine now?</div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Nov 11, 2014 at 11:55 AM, Todor Fassl <span dir="ltr"><<a href="mailto:fassl.tod@gmail.com" target="_blank">fassl.tod@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Suggestions?<div class="HOEnZb"><div class="h5"><br>
<br>
<br>
<br>
On 11/11/2014 10:47 AM, JD wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Is there a question?<br>
<br>
On 11/11/2014 11:32 AM, Todor Fassl wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I have a problem in a lab I am responsible for. The lab has 7 debian stable<br>
machines. Students log in to check mail, browse the web, etc. But they<br>
frequently walk away without logging out. Soon enough, the screen saver comes on<br>
and the next person sits down and logs in as another user. Often, the first<br>
person comes back hours late or the next day and logs in a second time. Some of<br>
these machines have the same user logged in 5 or 6 times.<br>
<br>
The problem is that some of these students start matlab, sage, or magma jobs<br>
before they walk away from the workstation. Those are legitimate jobs and should<br>
not be killed. In fact, sometimes students ssh to these machines and run<br>
computations. It's kind of a bad idea but I'd rather not tell them not to do<br>
that. Otherwise, I'd just have the machines reboot themselves every night.<br>
<br>
We used to use a tool called timeoutd but it seems to have been removed from the<br>
debian stable and ubuntu archives. I was never able to get it to work right<br>
anyway. Students would complain that their jobs had been killed or that they<br>
were logged out while they were typing away. At the same time, I could see that<br>
other users were still logged in after days/weeks of inactivity. I am not sure<br>
the problem really was with timeoutd because finger often gave me weird<br>
results.I'm not sure linux was giving timeoutd correct data to work with.<br>
<br>
</blockquote>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"> Ed Cashin <<a href="mailto:ecashin@noserose.net" target="_blank">ecashin@noserose.net</a>></div></div>
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