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<p>I agree with Akkana.. look for the cause,</p>
<p>If your system froze, try running the journalctl command (there's
lots of data in that). You can filter the data in many ways so as
not to get overwhelmed. For example:</p>
<p>To view the kernel logs (which might have clues to a crash or
hang)<br>
journalctl -rk</p>
<p>the (-r) will print the log in reverse order (meaning newest logs
show up first)</p>
<p>the (-k) will only show logs for the kernel (you can choose many
different logs to display with other options)</p>
<p>You can scroll down through the logs or type the colon (shift+;)
and q to quit the log.<br>
</p>
<p>Here is a link for helpful journalctl commands:</p>
<p><a class="moz-txt-link-freetext" href="https://www.thegeekdiary.com/6-useful-journalctl-command-examples-in-centos-rhel-7-cheat-sheet/">https://www.thegeekdiary.com/6-useful-journalctl-command-examples-in-centos-rhel-7-cheat-sheet/</a></p>
<p>I tried it on my ubuntu20.04 and I did not have to use sudo to
run the 'journalctl' commands.</p>
<p>Usually if a process hung it will be recorded in the kernel logs
and that give a path to follow. Also, has this happened multiple
times prior to the swap update? or did occur only once?</p>
<p><br>
</p>
<p><br>
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<div class="moz-cite-prefix">On 6/7/20 11:29 AM, Brian O'Keefe
wrote:<br>
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<blockquote type="cite"
cite="mid:de5a766f-e1c2-7fa5-ee4d-683559140492@cybermesa.com">
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<p>Thanks Akkana</p>
<p>Yeah, can't check much when frozen. I've looked at dmesg but
too much in there that I don't understand. I'll come running for
help if this gets worse. It's usually only every couple of days.
I do put the machine to sleep a lot. Maybe I need to shut down
daily or some such,</p>
<p>Best</p>
<p>Brian<br>
</p>
<div class="moz-cite-prefix">On 6/7/20 11:07 AM, Akkana Peck
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:20200607170706.GB2132@shallowsky.com">
<pre class="moz-quote-pre" wrap="">Brian O'Keefe writes:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap=""> I am loathe to increase the swap memory when it doesn't appear to be a
problem according to System Monitor.
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">This. I've seen a lot of discussion about swap, but if there was any
evidence that swap was the problem, I missed it. If adding swap is
going to be this hard, maybe put the effort instead into diagnosing
why the system is freezing?
For instance, do you know if it's X or the kernel that's freezing?
It would be interesting to try to ssh in from another machine,
to see if maybe the machine is up but X is locked.
Diagnosing a freeze isn't all that easy, because of course if the
kernel is hung, then the system has no way to note what went wrong.
But sometimes you can find out what was happening just before it
froze. Here's a Google search that gives some starting points:
<a class="moz-txt-link-freetext" href="https://www.google.com/search?client=ubuntu&channel=fs&q=diagnose+why+linux+freezing&ie=utf-8&oe=utf-8" moz-do-not-send="true">https://www.google.com/search?client=ubuntu&channel=fs&q=diagnose+why+linux+freezing&ie=utf-8&oe=utf-8</a>
...Akkana
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