#linuxadmin — Public Fediverse posts

I've been hosting more of my own stuff over time, but keeping up with the maintenance manually has been proving to be too much. I remember 100 years ago as a sysadmin setting up an Ubuntu management server to manage the fleet of Ubuntu servers at work in the style of the Red Hat stuff that did the same. Now I run a variety of instances, and I don't know what kind of orchestration machine I would need to spin up to keep things like OPNsense, remote *nix hosts, etc. up to date. Any recommendations?

My goal is to use only FOSS whenever possible (leaning towards things on Starlight's NO AI list so I can avoid slopcode running in my network wherever possible.

#selfhosting #selfhosted #selfhost #askfedi #sysadmin #linuxadmin

And here's another one:
https://github.com/0xdeadbeefnetwork/Copy_Fail2-Electric_Boogaloo

This one is not fixed by f4c50a40, so all current kernels are vulnerable. Looks like mitigation is possible by blocking kernel modules `esp4` + `esp6` here as well (and breaking #IPSec in doing so). Can someone confirm?

Why is it called "Electric Boogaloo"… is this a #DonaldByrd fan? Were they inspired by this week's @thekalimerashow shows??

#privilegeescalation #linux #vulnerability #linuxadmin #sysadmin #exploit #copyfail2 #electricboogaloo

And here's another one:
https://github.com/0xdeadbeefnetwork/Copy_Fail2-Electric_Boogaloo

This one is not fixed by f4c50a40, so all current kernels are vulnerable. Looks like mitigation is possible by blocking kernel modules `esp4` + `esp6` here as well (and breaking #IPSec in doing so). Can someone confirm?

Why is it called "Electric Boogaloo"… is this a #DonaldByrd fan? Were they inspired by this week's @thekalimerashow shows??

#privilegeescalation #linux #vulnerability #linuxadmin #sysadmin #exploit #copyfail2 #electricboogaloo

And here's another one:
https://github.com/0xdeadbeefnetwork/Copy_Fail2-Electric_Boogaloo

This one is not fixed by f4c50a40, so all current kernels are vulnerable. Looks like mitigation is possible by blocking kernel modules `esp4` + `esp6` here as well (and breaking #IPSec in doing so). Can someone confirm?

Why is it called "Electric Boogaloo"… is this a #DonaldByrd fan? Were they inspired by this week's @thekalimerashow shows??

#privilegeescalation #linux #vulnerability #linuxadmin #sysadmin #exploit #copyfail2 #electricboogaloo

And here's another one:
https://github.com/0xdeadbeefnetwork/Copy_Fail2-Electric_Boogaloo

This one is not fixed by f4c50a40, so all current kernels are vulnerable. Looks like mitigation is possible by blocking kernel modules `esp4` + `esp6` here as well (and breaking #IPSec in doing so). Can someone confirm?

Why is it called "Electric Boogaloo"… is this a #DonaldByrd fan? Were they inspired by this week's @thekalimerashow shows??

#privilegeescalation #linux #vulnerability #linuxadmin #sysadmin #exploit #copyfail2 #electricboogaloo

And here's another one:
https://github.com/0xdeadbeefnetwork/Copy_Fail2-Electric_Boogaloo

This one is not fixed by f4c50a40, so all current kernels are vulnerable. Looks like mitigation is possible by blocking kernel modules `esp4` + `esp6` here as well (and breaking #IPSec in doing so). Can someone confirm?

Why is it called "Electric Boogaloo"… is this a #DonaldByrd fan? Were they inspired by this week's @thekalimerashow shows??

#privilegeescalation #linux #vulnerability #linuxadmin #sysadmin #exploit #copyfail2 #electricboogaloo

Here we go again :-/ Another deterministic #privilegeescalation bug in the #Linux kernel. Make sure you're using at least the following version of your branch to mitigate against #dirtyfrag:

- 7.0.5
- 6.18.28
- 6.12.87
- 6.6.138
- 6.1.171
- 5.15.205
- 5.10.255

6.19 is eol, so it probably won't get patched. Remove and blocklist the following modules if you have to use an unpatched kernel: esp4 esp6 rxrpc

See https://github.com/V4bel/dirtyfrag/blob/master/README.md for more info.

#vulnerability #linuxadmin #sysadmin #exploit

Here we go again :-/ Another deterministic #privilegeescalation bug in the #Linux kernel. Make sure you're using at least the following version of your branch to mitigate against #dirtyfrag:

- 7.0.5
- 6.18.28
- 6.12.87
- 6.6.138
- 6.1.171
- 5.15.205
- 5.10.255

6.19 is eol, so it probably won't get patched. Remove and blocklist the following modules if you have to use an unpatched kernel: esp4 esp6 rxrpc

See https://github.com/V4bel/dirtyfrag/blob/master/README.md for more info.

#vulnerability #linuxadmin #sysadmin #exploit

Here we go again :-/ Another deterministic #privilegeescalation bug in the #Linux kernel. Make sure you're using at least the following version of your branch to mitigate against #dirtyfrag:

- 7.0.5
- 6.18.28
- 6.12.87
- 6.6.138
- 6.1.171
- 5.15.205
- 5.10.255

6.19 is eol, so it probably won't get patched. Remove and blocklist the following modules if you have to use an unpatched kernel: esp4 esp6 rxrpc

See https://github.com/V4bel/dirtyfrag/blob/master/README.md for more info.

#vulnerability #linuxadmin #sysadmin #exploit

Here we go again :-/ Another deterministic #privilegeescalation bug in the #Linux kernel. Make sure you're using at least the following version of your branch to mitigate against #dirtyfrag:

- 7.0.5
- 6.18.28
- 6.12.87
- 6.6.138
- 6.1.171
- 5.15.205
- 5.10.255

6.19 is eol, so it probably won't get patched. Remove and blocklist the following modules if you have to use an unpatched kernel: esp4 esp6 rxrpc

See https://github.com/V4bel/dirtyfrag/blob/master/README.md for more info.

#vulnerability #linuxadmin #sysadmin #exploit

Here we go again :-/ Another deterministic #privilegeescalation bug in the #Linux kernel. Make sure you're using at least the following version of your branch to mitigate against #dirtyfrag:

- 7.0.5
- 6.18.28
- 6.12.87
- 6.6.138
- 6.1.171
- 5.15.205
- 5.10.255

6.19 is eol, so it probably won't get patched. Remove and blocklist the following modules if you have to use an unpatched kernel: esp4 esp6 rxrpc

See https://github.com/V4bel/dirtyfrag/blob/master/README.md for more info.

#vulnerability #linuxadmin #sysadmin #exploit

I couldn't find a list of #Linux #kernel versions that include a patch for #copyfail, so I dug into the commit log and made one. Make sure you're using at least the following version of your branch to mitigate against copyfail:

- 7.0-rc7 (any stable 7.x is safe)
- 6.19.12
- 6.18.22
- 6.12.85
- 6.6.137
- 6.1.170
- 5.15.204
- 5.10.254

See https://copy.fail for more info about the #exploit.

#privilegeescalation #vulnerability #cryptography #linuxadmin #sysadmin

Before troubleshooting any Linux system, I run these commands. An 8-step Linux triage checklist with exact flags and what to do when you find a problem.

Read full guide here: https://ostechnix.com/linux-troubleshooting-commands-checklist/

#Linuxtroubleshooting #Linuxadmin #Linuxhowto #Linuxcommands

Oh, heck :(

#linuxadmin #filesystem #extr4 #opensource

https://www.tomshardware.com/service-providers/web-hosting/friends-gif-cripples-website-discussion-platform-backup-with-377-gigabytes-of-rachels-happy-dance-1-6mb-animation-was-replicated-246-173-times-breaking-filesystem-limit

🧑‍💻 Built your own MFA system yet?

We just dropped a full walkthrough on how to integrate Google Authenticator into RELIANOID’s MFA portal — with secrets stored in AD or LDAP.

🔐 Based on TOTP
🛡️ Validates tokens post-login
📱 Generates QR codes for new users

It’s secure, scalable, and open-source-friendly.

📖 Dive in:

https://www.relianoid.com/resources/knowledge-base/misc/implementing-google-authenticator-for-2fa-with-ldap-ad/

#MFA #GoogleAuthenticator #TOTP #SysAdminLife #LDAP #OpenSourceSecurity #LinuxAdmin #TechStack #RELIANOID

https://unixbhaskar.wordpress.com/2026/04/02/git-and-fzf-match-made-in-heaven/

#linuxadmin #tool #git #fzf #opensource

More coffee ☕ and some staring .....and Bob Dylan's numbers 🎧🎶

#linuxadmin #linuxkernel #tool #mailinglist #emacs #notmuch #opensource

Scanning ........and Eric Clapton's numbers 🎧🎶

#linuxadmin #rss #emacs #elfeed #opensource #tool

Passing time listening to Bob Dylan's number 🎧🎶🎶

#linuxadmin #linuxkernel #mailinglist #tool #notmuch #emacs #opensource

🎨 Sync-in 2.1 is out with a refreshed interface!

Discover what’s new 👇
https://sync-in.com/news/sync-in-2-1-ui-refresh

#documentmanagement #release #document #filesharing #opensource #foss #selfhosting #selfhosted #security #linux #privacy #datasovereignty #logicielslibres #libre #collaboration #authentification #cybersecurity #freesoftware #softwaredevelopement #softwareengineering #security #cloud #productivity #fediverse #linuxadmin #infosec #sysadmin #opensourcesoftware #selfhst #files

More coffee ☕ and some peeking

#linuxadmin #linuxkernel #opensource #tool #notmuch #emacs

Setting up DNS over HTTPS (DoH) is so much more complicated than DNS over TLS (DoT) :blobcatthinking:

Funny enough Mozilla Firefox :firefox: supports DoH and sets it up on application level, while Android :android: uses DoT on operating system level :blobcatnerd:

#itsalwaysdns #dns #dot #doh #sysadmin #linuxadmin

One more cup of hot coffee ☕ and some staring ...

#linuxadmin #linuxkernel #opensource #mailinglist #tool #emacs #notmuch

More coffee ☕ and some staring 😃

#linuxadmin #mailinglist #linuxkernel #tool #emacs #notmuch #opensource

🆔 OpenID Connect is now supported in Sync-in 2.0 🚀

👉 Learn more:
https://sync-in.com/news/sync-in-2-oidc

#documentmanagement #release #infosec #document #filesharing #opensource #foss #selfhosting #selfhosted #security #linux #privacy #datasovereignty #logicielslibres #libre #collaboration #authentification #cybersecurity #freesoftware #softwaredevelopement #softwareengineering #security #cloud #productivity #fediverse #linuxadmin #infosec #sysadmin #opensourcesoftware #selfhst #files #cybersecurity

How come we still don't have anything simpler to configure a bludy #UPS! Damn it!

#homelab #linuxAdmin #NUT

How come we still don't have anything simpler to configure a bludy #UPS! Damn it!

#homelab #linuxAdmin #NUT

How come we still don't have anything simpler to configure a bludy #UPS! Damn it!

#homelab #linuxAdmin #NUT

How come we still don't have anything simpler to configure a bludy #UPS! Damn it!

#homelab #linuxAdmin #NUT

How come we still don't have anything simpler to configure a bludy #UPS! Damn it!

#homelab #linuxAdmin #NUT

Complete tload command guide for Linux. Monitor CPU load average with live ASCII graphs. Installation, usage examples, and comparison with top, htop and uptime Commands.

Full guide here: https://ostechnix.com/tload-command-linux-system-load-monitor/

#tload #LinuxSystemLoad #Linuxhowto #Linuxadmin #Linuxcommands #CPULoad

Coooooooool !! Reproducible XFS filesystem .

#linuxadmin #xfs #filesystem #opensource

https://video.fosdem.org/2026/ua2114/RAUUL9-reproducible-xfs-images.av1.webm

Hello! 🤔

#linuxadmin #linux #opensource #lfs #blfs #operatingsystem

https://www.phoronix.com/news/LFS-Dropping-SysVinit

Elimination is the key...wondering what could be done to streamline 🤔

#linuxadmin #scripts #manage #opensource #tool

Learn how to install, configure, and secure SSH on Debian 13. Complete guide with SSH keys, firewall setup, and fail2ban protection.

Step-by-Step tutorial: https://ostechnix.com/set-up-configure-secure-ssh-debian-linux/

#SSH #SecureShell #Debian13 #Linux #Security #SSHHardening #Linuxadmin #Linuxhowto #Fail2ban #UFW #Firewall

Kernel update broke your system? Learn how to roll back a Linux kernel safely using GRUB or package managers.

Read full guide here: https://ostechnix.com/roll-back-linux-kernel/

#RollbackKernel #Kernel #Linux #Linuxhowto #Linuxadmin #Troubleshooting

🚀 Sync-in 1.10 now supports Collabora Online - @CollaboraOffice

👉 Learn more:
https://sync-in.com/news/sync-in-collabora

👉 Try our demo to compare:
https://sync-in.com/docs/demo/

#documentmanagement #release #collabora #opensource #foss #selfhosting #selfhosted #security #linux #privacy #datasovereignty #logicielslibres #libre #collaboration #authentification #cybersecurity #freesoftware #privacytools #cloud #productivity #fediverse #linuxadmin #infosec #sysadmin #opensourcesoftware #selfhst #files #sync_in

Learn how to convert man pages to PDF using man -t and ps2pdf. Complete guide with commands for Linux, BSD, and macOS.

Read the full guide here: https://ostechnix.com/print-export-man-pages-pdf-linux-unix/

#Manualpages #manpage #pdf #ps2pdf #Ghostscript #Postscript #mandoc #Linux #Unix #Bsd #Macos #Linuxcommands #Linuxbasics #Linuxhowto #Sysadmin #Linuxadmin

Linux permissions go beyond chmod. Learn how groups, sudo, and modern policy systems control services, reboot, and system-level authority.

More details here: https://ostechnix.com/linux-permissions-privileges-groups-sudo/

#LinuxPermissions #LinuxPrivileges #LinuxSecurity #Linuxadmin #Linuxcommands #Linuxhowto #sudo #Polkit #Systemd

Scanning .............RSS feeds

#linuxadmin #emacs #elfeed #opensource #tool

Learn how the Linux file command reveals the real file type, detects MIME types, inspects archives, and fixes real admin problems.

Full Tutorial: https://ostechnix.com/linux-file-command-explained/

#file #filetype #linux #linuxcommands #linuxbasics #linuxadmin #linuxhowto

Logs, databases, and caches grow under /var. Learn why Linux admins monitor the /var directory to prevent disk issues and service failures.

Full guide here: https://ostechnix.com/why-linux-admins-should-monitor-var/

#Logs #Var #Linuxadmin #Diskusage #Linuxhowto #Linuxcommands

We are very pleased to announce that Sync-in has been included in the selection of favorite open source applications for 2025 by @selfhosted @shollyethan ❤️

Many thanks for this recognition 🎉

#selfhst #sync_in #announce #opensource #foss #selfhosting #selfhosted #security #linux #privacy #datasovereignty #dataprotection #logicielslibres #libre #collaboration #authentification #cybersecurity #freesoftware #privacytools #cloud #productivity #fediverse #linuxadmin #infosec #git #devops

GNOME Boxes: Schlanke Virtualisierung für den Linux-Desktop (und warum es für Admins trotzdem spannend ist)

https://andreas-moor.de/gnome-boxes-schlanke-virtualisierung-fuer-den-linux-desktop-und-warum-es-fuer-admins-trotzdem-spannend-ist/

Secure Shell is an essential tool for remote system administration. Learn how to set up and configure SSH on Fedora Linux 43.

Step-by-Step Guide: https://ostechnix.com/set-up-configure-ssh-fedora/

#SSH #SecureShell #Fedora43 #Linux #Linuxadmin #Linuxhowto

Learn what drop-in (.d) directories are in Linux and how they help manage configuration files safely.

Full guide here: https://ostechnix.com/drop-in-d-directories-linux-configuration-explained/

#Linux #Linuxbasics #Linuxcommands #LinuxConfiguration #Linuxadmin

While sipping my Green Tea 🍵 ...scanning the industry news....and listening to Eric Clapton's numbers 🎶🎧🎸

#linuxadmin #emacs #elfeed #emms #opensource #tool

🚀 اكتشف GT-GMT – مدير الإقلاع الشامل على GNU/Linux!

إدارة GRUB وsystemd-boot وrEFInd أصبحت سهلة، آمنة وتفاعلية، مباشرة من الطرفية أو عبر AppImage.

🔹 تثبيت عن بعد:

bash <(curl -fsSL https://raw.githubusercontent.com/SalehGNUTUX/GT-GMT/main/install_online.sh)

🔹 نسخة AppImage مستقلة: تحميل GT-GMT AppImage

🔹 المستودع على GitHub: زيارة مستودع GT-GMT

💡 واجهة سهلة، دعم عربي، نسخ احتياطية، واستكشاف الأنظمة المثبتة. جربه الآن وامنح جهازك القوة الكاملة لإدارة الإقلاع! 💻✨

#مدير_الإقلاع #لينكس #أدوات_لينكس #نظام_تشغيل #GRUB #systemd_boot #rEFInd #برمجيات_حرة #مجتمع_لينكس #تكنولوجيا #برمجيات_مفتوحة #أدوات_نظام #تقنية #مطورين

#GTGMT #BootManager #Linux #GNU_Linux #GRUB #systemd_boot #rEFInd #OpenSource #AppImage #LinuxTools #LinuxUtilities #LinuxAdmin #SysAdmin #TechTools #Software #FreeSoftware #ArabicTech #LinuxCommunity #LinuxArabic #OpenSourceTools #gnutux

One fucking busy system 😜

#linuxadmin #linux #kernel #compiling #opensource

One fucking busy system 😜

#linuxadmin #linux #kernel #compiling #opensource