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#sysadmin

12 posts12 participants1 post today
Jan Schaumann<p>System Administration</p><p>This marks the end of the semester - if you followed along over the last few months in this thread, then I hope you had some fun and perhaps learned something new. If you want to revisit any of the topics, here's the entire semester's playlist of videos:</p><p><a href="https://youtube.com/playlist?list=PLDadzdouM0VBq9HdgalQkqFKvM7uSaj9L&amp;si=Gm4MEWv0Cr5ZcvCq" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">youtube.com/playlist?list=PLDa</span><span class="invisible">dzdouM0VBq9HdgalQkqFKvM7uSaj9L&amp;si=Gm4MEWv0Cr5ZcvCq</span></a></p><p>But remember that some topics didn't have any videos but had a few useful links on the course website:<br><a href="https://stevens.netmeister.org/615/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">stevens.netmeister.org/615/</span><span class="invisible"></span></a></p><p>Thanks for sharing!</p><p><a href="https://mstdn.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SysAdmin</span></a> <a href="https://mstdn.social/tags/SRE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SRE</span></a> <a href="https://mstdn.social/tags/DevOps" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DevOps</span></a></p>
Stefano Marinelli<p>People working on Linux or the BSDs (or illumos based OSes, etc), are you using two monitors? And, if so, what do you use them for? <br>I'm trying to understand if it makes sense to keep two monitors on my desk</p><p>Please boost</p><p><a href="https://mastodon.bsd.cafe/tags/Linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Linux</span></a> <a href="https://mastodon.bsd.cafe/tags/FreeBSD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FreeBSD</span></a> <a href="https://mastodon.bsd.cafe/tags/OpenBSD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenBSD</span></a> <a href="https://mastodon.bsd.cafe/tags/NetBSD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NetBSD</span></a> <a href="https://mastodon.bsd.cafe/tags/illumos" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>illumos</span></a> <a href="https://mastodon.bsd.cafe/tags/SmartOS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SmartOS</span></a> <a href="https://mastodon.bsd.cafe/tags/OmniOS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OmniOS</span></a> <a href="https://mastodon.bsd.cafe/tags/IT" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>IT</span></a> <a href="https://mastodon.bsd.cafe/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SysAdmin</span></a></p>
Jonathan Matthews<p>Here's a <a href="https://fosstodon.org/tags/Linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Linux</span></a> <a href="https://fosstodon.org/tags/networking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>networking</span></a> question for you: what's a lightweight way to allow an HTTP request to an arbitrary *user*-provided FQDN, but to prevent the connection being made if the FQDN maps to an RFC1918/private IP address?</p><p>(The relevant command here is <a href="https://fosstodon.org/tags/curl" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>curl</span></a>, but I don't think that matters as it doesn't appear to have a flag to say "only connect if the IP is /not/ inside these subnets".) <a href="https://fosstodon.org/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a> <a href="https://fosstodon.org/tags/devops" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>devops</span></a> <a href="https://fosstodon.org/tags/network" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>network</span></a> <a href="https://fosstodon.org/tags/hostnetworking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>hostnetworking</span></a> <a href="https://fosstodon.org/tags/sre" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sre</span></a> <a href="https://fosstodon.org/tags/systems" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>systems</span></a> <a href="https://fosstodon.org/tags/platformengineering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>platformengineering</span></a></p>
Peter N. M. Hansteen<p>Register now for BSDCan <a href="https://www.bsdcan.org/2025/index.html" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">bsdcan.org/2025/index.html</span><span class="invisible"></span></a> and get the Saturday reception for free! (until 2025-05-19)</p><p>Schedule <a href="https://indico.bsdcan.org/event/5/timetable/?layout=room#20250613.detailed" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">indico.bsdcan.org/event/5/time</span><span class="invisible">table/?layout=room#20250613.detailed</span></a> <a href="https://mastodon.social/tags/bsdcan" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>bsdcan</span></a> <a href="https://mastodon.social/tags/bsd" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>bsd</span></a> <a href="https://mastodon.social/tags/unix" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>unix</span></a> <a href="https://mastodon.social/tags/unixlike" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>unixlike</span></a> <a href="https://mastodon.social/tags/openbsd" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>openbsd</span></a> <a href="https://mastodon.social/tags/netbsd" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>netbsd</span></a> <a href="https://mastodon.social/tags/freebsd" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>freebsd</span></a> <a href="https://mastodon.social/tags/conference" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>conference</span></a> <a href="https://mastodon.social/tags/development" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>development</span></a> <a href="https://mastodon.social/tags/devops" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>devops</span></a> <a href="https://mastodon.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a> <a href="https://mastodon.social/tags/libresoftware" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>libresoftware</span></a> <a href="https://mastodon.social/tags/freesoftware" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>freesoftware</span></a></p>
smiddi<p><span class="h-card" translate="no"><a href="https://mastodon.social/@nixCraft" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>nixCraft</span></a></span></p><p>changed port to 22022, it's all good </p><p><a href="https://chaos.social/tags/devops" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>devops</span></a> <a href="https://chaos.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a> <a href="https://chaos.social/tags/linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>linux</span></a></p>
nixCraft 🐧<p>This is what real nightmares are made of: the error "ssh: connect to host ec2-bastion-host-your-public-ip port 22: Connection refused."</p><p><a href="https://mastodon.social/tags/devops" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>devops</span></a> <a href="https://mastodon.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a> <a href="https://mastodon.social/tags/linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>linux</span></a></p>
Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://functional.cafe/@ttuegel" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>ttuegel</span></a></span> I refuse to make estimates as a <a href="https://infosec.space/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a> and <a href="https://infosec.space/tags/IT" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>IT</span></a> professional <em>before</em> I have all the necessary facts on the table.</p><ul><li>I also explain to potential clients that I do this because I want to actually give them an accurate estimate and not end up with preventable cost overruns i.e. when a wall turns out to be massive steel-reinforced concrete and not acoustic-insulated drywall, because I've yet to see floorplans that actually and properly note these things down!</li></ul>
`Da Elf<p>Interesting.</p><p>Collabora CODE server won't install on Alma Linux 9 ... beeecauuuse their Repo gpg key is using a SHA1 hash and Alma 9 says Nuh-Uh.</p><p>*Blink *Blink</p><p>Now I can set the policy to use SHA1 if I want to, aaaand I don't really want to.</p><p>THey're going to make me run this in a docker, aren't they.</p><p><a href="https://mstdn.social/tags/CollaboraOfficeOnline" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CollaboraOfficeOnline</span></a> <a href="https://mstdn.social/tags/AlmaLinux9" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AlmaLinux9</span></a> <a href="https://mstdn.social/tags/GPG" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPG</span></a> <a href="https://mstdn.social/tags/SHA1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SHA1</span></a> <a href="https://mstdn.social/tags/OMGWTF" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OMGWTF</span></a> <a href="https://mstdn.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SysAdmin</span></a></p>
2.5 Admins<p>2.5 Admins 247: MPOF</p><p>The basic computer science problems that still remain unsolvable, why you shouldn’t trust AI to tune ZFS (or answer any admin questions), and setting up a check-in system for a group of friends.</p><p><a href="https://2.5admins.com/2-5-admins-247/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">2.5admins.com/2-5-admins-247/</span><span class="invisible"></span></a></p><p><a href="https://mastodon.social/tags/podcast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>podcast</span></a> <a href="https://mastodon.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a></p>
Kushal Das :python: :tor:<p>You decide to take a day of vacation and the red hot issues in production operation decides to happen on the same day, that is life. <a href="https://toots.dgplug.org/tags/devops" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>devops</span></a> <a href="https://toots.dgplug.org/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a></p>
nixCraft 🐧<p>What's the lifespan of a "temporary" workaround in IT?</p><p>Approximately the same as the universe, according to the ancient IT proverb: "There's nothing as permanent as a temporary solution." </p><p><a href="https://mastodon.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a> <a href="https://mastodon.social/tags/IT" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>IT</span></a> <a href="https://mastodon.social/tags/linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>linux</span></a> <a href="https://mastodon.social/tags/unix" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>unix</span></a></p>
tech<p><a href="https://unfufadoo.net/tags/tech" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>tech</span></a> <a href="https://unfufadoo.net/tags/photos" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>photos</span></a> <a href="https://unfufadoo.net/tags/heldesk" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>heldesk</span></a> <a href="https://unfufadoo.net/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a> <a href="https://unfufadoo.net/tags/infosec" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>infosec</span></a> <a href="https://unfufadoo.net/tags/cloud" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cloud</span></a> <a href="https://unfufadoo.net/tags/memes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>memes</span></a> <a href="https://unfufadoo.net/tags/images" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>images</span></a> <a href="https://unfufadoo.net/tags/funny" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>funny</span></a></p>
Stefano Marinelli<p>The Server That Wasn't Meant to Exist</p><p>A story from 16 years ago - trust, tech, and a server that had to disappear. They offered me a blank check. I said no.</p><p><a href="https://it-notes.dragas.net/2025/05/13/the_server_that_wasnt_meant_to_exist/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">it-notes.dragas.net/2025/05/13</span><span class="invisible">/the_server_that_wasnt_meant_to_exist/</span></a></p><p><a href="https://mastodon.bsd.cafe/tags/ITNotes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ITNotes</span></a> <a href="https://mastodon.bsd.cafe/tags/IT" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>IT</span></a>&nbsp;<a href="https://mastodon.bsd.cafe/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SysAdmin</span></a> <a href="https://mastodon.bsd.cafe/tags/OwnYourData" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OwnYourData</span></a></p>
Crazypedia⍼ :verified_pride:<p>Oh fuck me. It's a <a href="https://masto.hackers.town/tags/FullMoon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FullMoon</span></a> on a <a href="https://masto.hackers.town/tags/PatchTuesday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PatchTuesday</span></a> </p><p>Any superstitious <a href="https://masto.hackers.town/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a> about? 😅</p>
mauvehed 🐿️ (KØMVH)<p>System stats are important because they allow you to make obvious assessments of your assets through a visual means.</p><p>Like this one container that was consuming almost half the CPU on my server for no reason I could determine. </p><p>A simple restart kicked it in the pants and got it back to normal.</p><p>I love stats! This sure beats the days of MRTG.</p><p><a href="https://defcon.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SysAdmin</span></a> <a href="https://defcon.social/tags/Hackers" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Hackers</span></a> <a href="https://defcon.social/tags/StatsNerds" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>StatsNerds</span></a></p>
LINUXexpert.org<p>🧙‍♂️ Ever thought about building your own World of Warcraft private server?</p><p>It's more than nostalgia—it's a full-stack learning experience in Linux, networking, game design, SQL, cybersecurity, and DevOps. ⚔️💻</p><p>Learn what it takes:<br>🔗 <a href="https://linuxexpert.org/what-you-can-learn-from-building-a-world-of-warcraft-private-server/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">linuxexpert.org/what-you-can-l</span><span class="invisible">earn-from-building-a-world-of-warcraft-private-server/</span></a></p><p><a href="https://mastodon.social/tags/Linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Linux</span></a> <a href="https://mastodon.social/tags/DevOps" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DevOps</span></a> <a href="https://mastodon.social/tags/GameDev" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GameDev</span></a> <a href="https://mastodon.social/tags/WoW" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>WoW</span></a> <a href="https://mastodon.social/tags/PrivateServer" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PrivateServer</span></a> <a href="https://mastodon.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SysAdmin</span></a> <a href="https://mastodon.social/tags/Networking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Networking</span></a> <a href="https://mastodon.social/tags/SQL" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SQL</span></a> <a href="https://mastodon.social/tags/OpenSource" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenSource</span></a> <a href="https://mastodon.social/tags/TrinityCore" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>TrinityCore</span></a> <a href="https://mastodon.social/tags/LearningByDoing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LearningByDoing</span></a></p>
Jonathan Kamens 86 47<p>Sysadmin journal: setting up wireguard on all of my Linux&nbsp;desktops</p><p>I had to hack together a few things to use wireguard transparently on my Android phone and all of my Linux laptops and desktop.<br><a href="https://federate.social/tags/ddclient" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ddclient</span></a> <a href="https://federate.social/tags/Linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Linux</span></a> <a href="https://federate.social/tags/NetworkManager" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NetworkManager</span></a> <a href="https://federate.social/tags/VPN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>VPN</span></a> <a href="https://federate.social/tags/wireguard" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>wireguard</span></a> <a href="https://federate.social/tags/Ansible" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Ansible</span></a> <a href="https://federate.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SysAdmin</span></a><br><a href="https://blog.kamens.us/2025/05/10/sysadmin-journal-setting-up-wireguard-on-all-of-my-linux-desktops/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">blog.kamens.us/2025/05/10/sysa</span><span class="invisible">dmin-journal-setting-up-wireguard-on-all-of-my-linux-desktops/</span></a></p>
bbbourq<p>I just passed the Red Hat Certified System Administrator exam! </p><p><a href="https://lingo.lol/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a> <a href="https://lingo.lol/tags/technology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>technology</span></a> <a href="https://lingo.lol/tags/redhat" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>redhat</span></a> <a href="https://lingo.lol/tags/linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>linux</span></a></p>
Karl Baron<p>Rest in Piece FATTYDOVE Racing, you had an... adequate... 4 year run</p><p><a href="https://bitbang.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a></p>
Mad A. Argon :qurio:<p>Old comment on forum: Migrating from <a href="https://is-a.cat/tags/postgres" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>postgres</span></a> 9.5 to 11+ is painful.</p><p>Me, migrating from 9.4 to 17.2 for several weeks: Huh, I didn't think about it...</p><p>:blobcatsweat: </p><p><a href="https://is-a.cat/tags/admin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>admin</span></a> <a href="https://is-a.cat/tags/sysadmin" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sysadmin</span></a> <a href="https://is-a.cat/tags/postgresql" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>postgresql</span></a></p>