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<li class="toctree-l2"><a href="#misc-tips-troubleshooting">Misc Tips, TroubleShooting</a></li>
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<li><a class="toctree-l3" href="#sending-commands-to-lxd-containers">Sending commands to LXD containers</a></li>
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<h1 id="misc-tips-troubleshooting">Misc Tips, TroubleShooting</h1>
<h2 id="sending-commands-to-lxd-containers">Sending commands to LXD containers</h2>
<p>Use <code>bash -c "&lt;command&gt;"</code> for commands with wildcards. i.e.</p>
<pre><code class="bash">for machine in $(lxc list | grep RUNNING | awk '{print $2}') ;\
do lxc exec &quot;${machine}&quot; -- bash -c &quot;cat /etc/apt/apt.conf.d/02*&quot; ; done
</code></pre>
<p>fish shell is actually a little bit cleaner</p>
<pre><code class="fish">for machine in (lxc list | grep RUNNING | awk '{print $2}') ; \
lxc exec $machine -- bash -c &quot;cat /etc/apt/apt.conf.d/02*&quot; ; end
</code></pre>
<pre><code class="fish"># change all their time zones
for machine in (lxc list | grep RUNNING | awk '{print $2}') ; \
lxc exec $machine -- bash -c &quot;timedatectl set-timezone America/Los_Angeles&quot; ; end
# check to see if anyone is logged in before rebooting
for machine in (lxc list | grep RUNNING | awk '{print $2}') ; echo ; \
echo $machine ; lxc exec $machine -- bash -c &quot;who&quot; ; end
</code></pre>
<h2 id="move-lxd-container-to-another-server">Move LXD container to another Server</h2>
<pre><code class="bash"># stop the container
lxc stop &lt;container name&gt;
# publish image of container to local *storage*
lxc publish &lt;container name&gt; --alias &lt;image name&gt;
# export the new image to tarball
lxc image export &lt;image name&gt;
# scp tarball to other box
scp a4762b114fecee2e2bc227b9032405642c5286c02009babef7953e011e597bfe.tar.gz server:
# on other box import the image
lxc image import &lt;tarball file name&gt; --alias &lt;image name&gt;
# launch container
lxc launch &lt;image name&gt; &lt;container name&gt;
# assign profile to container
lxc profile assign &lt;container name&gt; &lt;profile name&gt;
</code></pre>
<p>Shell into the new running container, update any network interface
configurations that you need to, and then restart the container.</p>
<p>See also
<a href="../lxd_container_home_server_networking_for_dummies/">LXD Container Home Server Networking For Dummies</a></p>
<h2 id="ubuntu-mate-welcome-center-doesnt-work-for-some-repos">Ubuntu-Mate-Welcome-Center doesn't work for some repos</h2>
<p>Perhaps your apt-cacher-ng proxy server isn't configured to allow
traffic through from https sources. Make sure the following is
uncommented. This applies for all PPA's that use https.</p>
<pre><code class="conf"># /etc/apt-cacher-ng/acng.conf
PassThroughPattern: .*
</code></pre>
<h2 id="quitting-mosh">Quitting Mosh</h2>
<p>The key combination to quit mosh it <code>ctrl+6+.</code>
Also, WTF?</p>
<h2 id="updating-caddy-server">Updating Caddy Server</h2>
<p>You update Caddy Server with a new Go Binary, try to restart caddy.service, and it fails.
Maybe you get an error message such as the following <code>listen tcp :80: bind: permission denied</code> and/or
<code>listen tcp :443: bind: permission denied</code>.<br />
Fix this error with the following command <code>sudo setcap CAP_NET_BIND_SERVICE=+eip /path/to/caddy</code></p>
<h2 id="zfs-disc-error-disc-identification">ZFS Disc Error Disc Identification</h2>
<p>You created a zpool using /dev/disk-by-id to specify the devices, and now you want to figure out
which disks are causing you trouble. For instance, your system log, <code>journalctl | grep -i fail</code>
shows read error on /dev/sdc. </p>
<p>You can use <code>lsblk -o MODEL,SERIAL</code> to match the information generated by <code>zpool status</code>.</p>
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<h2 id="byobutmux-copy-mode">Byobu/Tmux copy mode</h2>
<ol>
<li>
<p>Enter Copy Mode </p>
<ul>
<li>in byobu use key <code>F7</code></li>
<li>in tmux use <code>&lt;prefix&gt; [</code></li>
</ul>
</li>
<li>
<p>Navigate around less/copy buffer using <code>h,j,k,l</code></p>
</li>
<li>
<p>Select text</p>
<ul>
<li><code>&lt;space&gt;</code> begins text selection</li>
<li>move cursor around using <code>h,j,k,l</code></li>
<li><code>&lt;enter&gt;</code> ends text selection</li>
</ul>
</li>
<li>
<p>Paste selection in any tmux/byobu window</p>
<ul>
<li>in byobu use <code>alt+insert</code></li>
<li>in tmux use <code>&lt;prefix&gt; ]</code></li>
</ul>
</li>
</ol>
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