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#systemadministration

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It's FOSS<p>Happy System Administrator Appreciation Day! 🥳</p><p>If you didn't know: <a href="https://en.wikipedia.org/wiki/System_Administrator_Appreciation_Day" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/System_A</span><span class="invisible">dministrator_Appreciation_Day</span></a></p><p><a href="https://mastodon.social/tags/systemadministrator" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>systemadministrator</span></a> #<a href="https://mastodon.social/tags/systemadministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>systemadministration</span></a></p>
Cyberagentur<p>Systemadministratoren sorgen im Verborgenen für Stabilität, Schutz und Reaktionsfähigkeit.<br>Am heutigen <a href="https://social.bund.de/tags/SysAdminDay" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdminDay</span></a> erinnern wir daran. Unsere Forschungsprogramme können sie unterstützen. Die <span class="h-card" translate="no"><a href="https://social.bund.de/@Cyberagentur" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>Cyberagentur</span></a></span> finanziert Werkzeuge, die Admins helfen, Systeme vorausschauend abzusichern. Forschung für eine sichere digitale Infrastruktur. <br>Mehr zum Aktionstag: <a href="https://t1p.de/3zdp0" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">t1p.de/3zdp0</span><span class="invisible"></span></a><br><a href="https://social.bund.de/tags/Systemadministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Systemadministration</span></a> <a href="https://social.bund.de/tags/ITSecurity" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ITSecurity</span></a> <a href="https://social.bund.de/tags/Cyberagentur" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Cyberagentur</span></a> <a href="https://social.bund.de/tags/Cyberresilienz" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Cyberresilienz</span></a> <a href="https://social.bund.de/tags/DigitaleSouveraenitaet" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DigitaleSouveraenitaet</span></a> <a href="https://social.bund.de/tags/ForschungF%C3%BCrDieSicherheit" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ForschungFürDieSicherheit</span></a></p>
Monospace Mentor<p>Linux tip: Use `systemctl --failed` to quickly identify which services failed to start after boot. Much faster than scrolling through journal logs when troubleshooting system issues. <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a></p>
Monospace Mentor<p>Linux tip: Set `HISTCONTROL=ignoredups:erasedups` in your init script to prevent duplicate commands cluttering your history. Clean history makes command recall much more efficient. <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a></p>
Monospace Mentor<p>I've been busy preparing my community course "Basic Linux System Administration" for a few weeks now. The next instructor-led cohort starts in September.</p><p>Here's the public chapter on text editing with vim. You can use it outside the course context, simply as a concise <a href="https://floss.social/tags/vim" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>vim</span></a> tutorial.</p><p><a href="https://courses.monospacementor.com/courses/linsys-1/mod01-fundamentals/0105-editing.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">courses.monospacementor.com/co</span><span class="invisible">urses/linsys-1/mod01-fundamentals/0105-editing.html</span></a></p><p><a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a> <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a></p>
Monospace Mentor<p>Shell tip: `${var%suffix}` removes the shortest matching suffix. `${var%%suffix}` removes the longest. `${var#prefix}` and `${var#<a href="https://floss.social/tags/prefix" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>prefix</span></a>}` work the same for prefixes. Mnemonic: # comes before % on the keyboard. <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a></p>
Monospace Mentor<p>Linux tip: `fuser -v /path/to/file` shows which processes have a file open. Use `-k` to kill those processes. Essential when "device busy" errors prevent unmounting filesystems. <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a></p>
Monospace Mentor<p>🚨LIVE NOW!🚨 DevOps/SRE Instructor Live Stream</p><p>On this lovely Friday, let's chat about <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a>, <a href="https://floss.social/tags/SelfHosting" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SelfHosting</span></a>, or any other topic in the <a href="https://floss.social/tags/DevOps" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DevOps</span></a> and <a href="https://floss.social/tags/SRE" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SRE</span></a> space you're interested in!</p><p><a href="https://monospacementor.com/live-stream/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">monospacementor.com/live-strea</span><span class="invisible">m/</span></a></p>
Monospace Mentor<p>Version-control every configuration change. Use git even for single files. When something breaks, you can see exactly what changed and when. Your future self will be grateful. <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a> <a href="https://floss.social/tags/Coding" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Coding</span></a></p>
Monospace Mentor<p>Linux tip: `ionice -c 3 command` runs a command with idle I/O priority. It only gets disk access when no other processes need it. Perfect for backups or maintenance tasks. <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a> <a href="https://floss.social/tags/Performance" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Performance</span></a></p>
Monospace Mentor<p>Linux tip: `sysctl vm.drop_caches=3` clears page cache, dentries, and inodes from memory. Useful for testing cold cache performance, but never use in production scripts. Only for debugging! <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> @<a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a></p>
Monospace Mentor<p>Linux tip: `pidof process_name` returns process IDs by name. Unlike `pgrep`, it matches only the command name, not arguments. Use in scripts where you need exact process name matching. <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a></p>
FreeBSD Foundation<p>Did you know FreeBSD includes a built-in utility for scheduling routine maintenance tasks?</p><p>From daily security checks to system cleanup jobs, the periodic system helps keep things running smoothly — and it’s easy to customize.</p><p>Learn how to use existing periodic scripts and integrate your own in our latest blog:</p><p> <a href="https://freebsdfoundation.org/blog/an-introduction-to-freebsds-periodic-system/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">freebsdfoundation.org/blog/an-</span><span class="invisible">introduction-to-freebsds-periodic-system/</span></a></p><p><a href="https://mastodon.social/tags/FreeBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FreeBSD</span></a> <a href="https://mastodon.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://mastodon.social/tags/OpenSource" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OpenSource</span></a> <a href="https://mastodon.social/tags/Automation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Automation</span></a> <a href="https://mastodon.social/tags/TechTools" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TechTools</span></a></p>
Monospace Mentor<p>🚨LIVE NOW!🚨 DevOps/SRE Instructor Live Stream</p><p>On this lovely Tuesday, let's chat about <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a>, <a href="https://floss.social/tags/SelfHosting" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SelfHosting</span></a>, or any other topic in the <a href="https://floss.social/tags/DevOps" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DevOps</span></a> and <a href="https://floss.social/tags/SRE" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SRE</span></a> space you're interested in!</p><p><a href="https://monospacementor.com/live-stream/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">monospacementor.com/live-strea</span><span class="invisible">m/</span></a></p>
Monospace Mentor<p>Linux tip: `strace -e trace=file program` traces only file-related system calls. Add `-o output.txt` to save results. Reveals which config files, libraries, or data files your program actually accesses. <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a></p>
Monospace Mentor<p>Linux tip: `systemd-analyze blame` shows which services slow down boot time. Use `systemd-analyze critical-chain` to see the dependency chain causing delays. Optimize the real bottlenecks. <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a></p>
Monospace Mentor<p>Linux tip: `iostat -x 1` monitors disk I/O performance every second. Watch the `%util` column - consistently high values indicate I/O bottlenecks. Press Ctrl+C to stop monitoring. <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/Performance" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Performance</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a></p>
Monospace Mentor<p>Linux tip: `ss -s` provides socket statistics summary. Shows TCP/UDP connection counts and states. Much faster than parsing full socket lists when you just need connection metrics. <a href="https://floss.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> <a href="https://floss.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://floss.social/tags/SysAdmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SysAdmin</span></a></p>
A.J. Armstrong<p>Powershell - Export all members of all AD Security Groups to CSV&nbsp;|&nbsp;<a href="https://techygeekshome.info/powershell-export-all-members-of-all-ad-security-groups-to-csv/?fsp_sid=2635&nbsp;|&nbsp;#Guide" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">techygeekshome.info/powershell</span><span class="invisible">-export-all-members-of-all-ad-security-groups-to-csv/?fsp_sid=2635&nbsp;|&nbsp;#Guide</span></a> <a href="https://techhub.social/tags/Microsoft" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Microsoft</span></a> <a href="https://techhub.social/tags/Powershell" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Powershell</span></a> <a href="https://techhub.social/tags/Windows" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Windows</span></a>#PowershellScripting <a href="https://techhub.social/tags/ActiveDirectory" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ActiveDirectory</span></a> <a href="https://techhub.social/tags/SecurityGroups" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SecurityGroups</span></a> <a href="https://techhub.social/tags/CSVExport" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CSVExport</span></a> <a href="https://techhub.social/tags/AutomatingTasks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AutomatingTasks</span></a> <a href="https://techhub.social/tags/DataManagement" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DataManagement</span></a> <a href="https://techhub.social/tags/ITProfessionals" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ITProfessionals</span></a> <a href="https://techhub.social/tags/Coding" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Coding</span></a> <a href="https://techhub.social/tags/SystemAdministration" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SystemAdministration</span></a> <a href="https://techhub.social/tags/TechSolutions" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TechSolutions</span></a>&nbsp;<br><a href="https://techygeekshome.info/powershell-export-all-members-of-all-ad-security-groups-to-csv/?fsp_sid=2635" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">techygeekshome.info/powershell</span><span class="invisible">-export-all-members-of-all-ad-security-groups-to-csv/?fsp_sid=2635</span></a></p>
Monospace Mentor Live<p>We're live!</p><p>DevOps/SRE Live Stream</p><p><a class="hashtag" href="https://directory.owncast.online/tags/owncast" rel="nofollow noopener" target="_blank">#owncast</a> <a class="hashtag" href="https://directory.owncast.online/tags/streaming" rel="nofollow noopener" target="_blank">#streaming</a> <a class="hashtag" href="https://directory.owncast.online/tags/linux" rel="nofollow noopener" target="_blank">#linux</a> <a class="hashtag" href="https://directory.owncast.online/tags/ruby" rel="nofollow noopener" target="_blank">#ruby</a> <a class="hashtag" href="https://directory.owncast.online/tags/sysadmin" rel="nofollow noopener" target="_blank">#sysadmin</a> <a class="hashtag" href="https://directory.owncast.online/tags/systemadministration" rel="nofollow noopener" target="_blank">#systemadministration</a> <a class="hashtag" href="https://directory.owncast.online/tags/unix" rel="nofollow noopener" target="_blank">#unix</a> <a class="hashtag" href="https://directory.owncast.online/tags/devops" rel="nofollow noopener" target="_blank">#devops</a> <a class="hashtag" href="https://directory.owncast.online/tags/development" rel="nofollow noopener" target="_blank">#development</a> <a class="hashtag" href="https://directory.owncast.online/tags/livecoding" rel="nofollow noopener" target="_blank">#livecoding</a> <a class="hashtag" href="https://directory.owncast.online/tags/codestream" rel="nofollow noopener" target="_blank">#codestream</a> <a class="hashtag" href="https://directory.owncast.online/tags/tech" rel="nofollow noopener" target="_blank">#tech</a></p><p><a href="https://live.monospacementor.com" rel="nofollow noopener" target="_blank">https://live.monospacementor.com</a></p>
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