#sysAdmin

Monospace Mentormonospace@floss.social
2025-07-13

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. #Linux #Performance #SystemAdministration #SysAdmin

Admin:Docsitdocs
2025-07-13

Stell dir vor, du verwaltest einen Linux-Server in einem Unternehmen. Plötzlich beschweren sich Kollegen, dass die Webseite langsam lädt. Oder noch schlimmer: Das System reagiert gar nicht mehr.

Ohne die richtigen Monitoring-Kenntnisse stehst du vor einem Rätsel und genau hier kommt die Systemüberwachung ins Spiel.

admindocs.de/linux-administrat

Ralf Lenz, BOFH Emeritus 🏴‍☠️ralf@fedi.jrlenz.net
2025-07-13
Visual depiction of how various standard performance measuring tools interact with the OS and various hardware devices.
2025-07-13

Interesting thought:

What if Mastodon offered a way to include code blocks in a status update? Such as starting/ending a code snippet with ` or a larger portion with ```. It's straightforward Markdown, so it COULD be implemented.

#computing #sysadmin #coding

Mărcziem ™marcziem_
2025-07-12

Wieder mal ein Server "langsam"?

Während andere wild `killall` tippen, schaue ich kurz in `top`, dann `iostat`, finde den Python-Prozess der seit 3h rechnet und erkläre dem Kollegen die USE-Methode. Er nickt und macht trotzdem `sudo reboot`.

Monitoring ist wie Autofahren - die meisten denken, sie können es.

admindocs.de/linux-administrat

Kevin P. Flemingkevin@km6g.us
2025-07-12

Fun times this morning after a recent upgrade to Mastodon 4.4 and Ruby 3.4. I use ruby-build to build Ruby from source, and install it into /opt/ruby-<version>. I don't add that to the PATH, because all the programs which need it can be told where it is.

I've got a systemd service + timer called 'mastodon-prune' which run various 'tootctl' commands to clean up Mastodon content, and this has been working well for a long time. After the upgrade it stopped.

The commands in the unit looked like '/opt/ruby-3.4.4/bin/ruby bin/tootctl accounts prune'. This stopped working after the Ruby upgrade, because *now* Ruby pays attention the shebang line in the 'tootctl' file which says '/usr/bin/env ruby' and tries to find Ruby on the path... in spite of the script being executed by an explicitly-invoked version of the Ruby interpreter. Since I could not find a way to convince Ruby to ignore the shebang line, I relented and added Ruby to the PATH so it could be found, and simplified the commands.

I do not understand why anyone would want this behavior, but it's what it is.

#Ruby #SysAdmin #MastodonAdmin

Ricardo Prudenciatorprudenciato
2025-07-12

Launching the new LPIC-3 305 Training – Now Available in English!

The only online course in the world fully dedicated to the @LPI LPIC-3 305 exam.

certifylinux.com/courses/lpic-

lpic-3 305 training
dan_nannidan_nanni
2025-07-12

VLANs can be categorized based on different criteria such as their role in the network, method of assignment, or how they handle Ethernet frames 😎👇

Find high-res pdf books with all my related infographics at study-notes.org

Joshua C. Colp 🇨🇦 🚴 🏃 🚣‍♂️jcolp@oceanplayground.social
2025-07-12

Well that was easy. Took me all of 20 minutes to get XGS-PON SFP+ module configured for my ISP, to get router configured, and to switch away from the ISP router. Everything working perfectly! Full speeds all around. #networking #sysadmin

2025-07-12

@lunareclipse

Furthermore I'd also say that #developers in general do not consider it their responsibility to take care of #backups and instead consider this a responsibility of the #sysadmin / end-user.

Therefore (especially they wouldn't have to do anything for it on literally all other platforms) at least all "non native android developers" will not even think about this possibility at all (therefore that framework/template default goes unnoticed and unchanged).

2025-07-12

Did you know that there is FREE online #Graylog analyst training? 🆓 Take a look at Graylog Academy! Designed from the ground up by internal Grayloggers and experts—anyone can sign up for Graylog Academy Training. 💯

Here’s some of what you can learn about:
🔍 Search Fundamentals
📊 Introduction to Graylog Dashboards
🪵 Log Ingestion
ℹ️ Pipelines, Parsing and Graylog Information Model
👁️ Dashboards and Visualization
⚠️ Events, Alerts and Notifications
🔐 Intro to API Security
👋 Interactive Tours

Wondering if Graylog Academy is right for you? This training is ideal for:
✔️ IT pros
✔️ #Security analysts
✔️ System administrators
✔️ Anyone interested in learning about log management & analysis

Enroll here! ⤵️
graylog.org/post/graylog-acade #ITpro #sysadmin #securityanalyst #cybersecurity

2025-07-12

Looking for a quick chat here on whether or not you let your employees log into work accounts from any type of personal devices? This includes phones and tablets.

Obviously for best security, we all know the answer should be a big fat NO.

But I’m curious how strict everyone is about it - or if you’re an MSP, how often do your clients enforce it?

#cybersec #mdm #msp #sysadmin #cto

appzer0 - Libertadminappzer0@piaille.fr
2025-07-11

Liberta Vidéo has been upgraded to Peertube 7.2.1

Liberta Cloud has been upgraded to Nextcloud 31.0.7

Cheers!

liberta.vip

#liberta #peertube #nextcloud #sysadmin #hosting #floss

appzer0 - Libertadminappzer0@piaille.fr
2025-07-11

Liberta Vidéo a été mise à jour vers Peertube 7.2.1

Liberta Cloud a été mis à jour vers Nextcloud 31.0.7

Cheers!

liberta.vip

#liberta #peertube #nextcloud #sysadmin #hosting #floss

Open Source JobHubosjobhub@fosstodon.org
2025-07-11

Is your organization searching for open source professionals? Post your jobs now on #OSJH and reach experts in technical and non-technical roles
opensourcejobhub.com/quickstar
#career #FOSS #hiring #engineers #DevOps #Python #sales #marketing #security #sysadmin

(illustration of different people in cogs) Looking for open source talent?
2025-07-11

Recently hired as a systems engineer to do Linux stuff and work on automations. Awesome.

Cant install any tools on my laptop, must do all development in a Windows VDI. Okay.

The Dev VDI has git cmd installed, but not vscode, or WSL, or current versions of Python or powershell. Not approved to install anything.

Prod VDI has vscode, but not git or WSL or Python. Can’t install anything.

Also… All VDI’s are non-persistent and get rebuilt every 7 days.

So not only was I hired to do Linux focused work and do not have access to linux, none of the environments I’m allowed to use have any of the tools I need to use unless I try to code in fucking notepad.

Oh also, “by the way we want a lot of these automations done in PowerShell even though we knew you didn’t know PowerShell when you were hired”.

#Wtf #ffs #sysadmin #helpme #corporatepurgatory

Fabián Rodríguez 🛡💾 🇨🇴 🌴magicfab
2025-07-11

Mise-à-jour de documentation : comment installer en d'autres langues ou en ajouter (16 disponibles!) - ici, on ajoute le Français et l'Espagnol

dulib.re/wiki/doku.php/zabbix_

@zabbix_forum

Logo de Zabbix
dan_nannidan_nanni
2025-07-11

Ufw (“Uncomplicated Firewall”) is the user-friendly frontend for iptables, which is commonly used as a host-based firewall on Debian-based Linux

Here are useful ufw command examples 😎👇

Find high-res pdf books with all my related infographics at study-notes.org

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