#Linux security best practice: Create system user accounts for services that can’t be used for login: `useradd -r -s /sbin/nologin servicename`
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration #SysAdmin
The init system that powers most Linux distributions - systemd manages services, handles boot, netwo
The init system that powers most Linux distributions - systemd manages services, handles boot, networking, logging, and user sessions with millisecond precision and parallel startup
https://github.com/systemd/systemd
#Linux #SystemAdministration #InfrastructureCode
TIL (at 3 am): Upgrading Dovecot is not fun when the behavior changes a lot. Took several hours to get it running identical to before. But at least I could remove some old configuration parts.
kittsteiner.blog/blog/2026/dovecot-update... #Debian #DevOps #Dovecot #Linux […]
Want to pass HCL-DOM-PADM-145 on your first try? 🔍
Check out this video for smart prep strategies and key Domino 14.5 exam insights.
▶️ youtu.be/5vuJofXiLSk
#HCLSoftware #Domino14_5 #HCL_DOM_PADM_145 #ProfessionalAdministrator #SystemAdministration
An introduction to SSH
negativepid.blog/an-...
#SSH #secureShell #IT #sysAdmin #systemAdministration #commandLine #Cybersecurity #cyberattacks #cyberThreats #onlineSecurity #negativepid
Easy way to kickstart a runbook: Log actions with “history | tail -20 | tee file.md” to capture recent commands, then add explanations.
🔗 Learn more in my course: https://monospacementor.com/courses/linsys-1/
#Linux #SystemAdministration #SysAdmin
#Kubernetes #CKA #CloudNative #CNCF #OpenSource #K8s #DevOps #SRE #PlatformEngineering #CloudComputing #InfrastructureAsCode #LinuxFoundation #TechCommunity #ContinuousLearning #Kubestronaut #SoftwareEngineering #Cloud #SystemAdministration #Certification
Linux tip: Use “ss -tuln” to check for open ports. Filter specific port numbers by adding “| grep :80”, for example.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration #SysAdmin
If you want to raise your shell scripts to a new level, give this a try! It'll give useful feedback on the style of your shell code and on possible issues with it.
www.shellcheck.net
PS: Know when to switch to a proper programming language.
#Linux #SysAdmin #SystemAdministration
If your terminal ever gets confused by random control sequences, for example after you accidentally output binary data, there's a good chance you can restore order with the `reset` command.
#Linux #Shell #SystemAdministration #SysAdmin
An introduction to SSH
negativepid.blog/an-...
#SSH #secureShell #IT #sysAdmin #systemAdministration #commandLine #Cybersecurity #cyberattacks #cyberThreats #onlineSecurity #negativepid
We're looking for a cybersecurity analyst!
Apply online: warcollar-jobs.services.agileonboarding.com/jobs/details...
#cybersecurity #NetworkEngineering #systemadministration #networksecurity #dataanalytics #AI
A quick-start guide to UNIX commands
negativepid.blog/a-q...
#UNIX #commandLine #Linux #MacOS #OSarchitecture #systemAdministration #sysAdmin #Cybersecurity #cyberattacks #cyberThreats #onlineSecurity #negativepid
Linux tip: Full filesystems crash services and corrupt data. Find resource hogs with “df -h” (filesystem usage) and “du -sh /var/log/*” (large directories).
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
🚨LIVE NOW!🚨 DevOps/SRE Instructor Livestream
On this lovely Thursday, let's chat about #Linux #SystemAdministration, #SelfHosting, or any other topic in the #DevOps and #SRE space you're interested in!
monospacementor.com/live-stream/
Mehr zu SAP BASIS finden Sie in unserem übergreifenden SAP Basis Info-Cube. Welche Wissenslücken Sie wohl haben? Mehr dazu im Quiz:
s4-experts.com/2019/05/01/s...
#SAP #BASIS #Systemadministration #Systemadministrator #sapbasis
Mehr zu SAP BASIS finden Sie in unserem übergreifenden SAP Basis Info-Cube. Welche Wissenslücken Sie wohl haben? Mehr dazu im Quiz:
s4-experts.com/2019/05/01/s...
#SAP #BASIS #Systemadministration #Systemadministrator #sapbasis
Mehr zu SAP BASIS finden Sie in unserem übergreifenden SAP Basis Info-Cube. Welche Wissenslücken Sie wohl haben? Mehr dazu im Quiz:
s4-experts.com/2019/05/01/s...
#SAP #BASIS #Systemadministration #Systemadministrator #sapbasis
🚨LIVE NOW!🚨 DevOps/SRE Instructor Livestream
On this lovely Wednesday, let's chat about #Linux #SystemAdministration, #SelfHosting, or any other topic in the #DevOps and #SRE space you're interested in!
monospacementor.com/live-stream/
Linux tip: Use “ps aux --forest” for a neat process tree view. The parent-child relationships make it easier to find root causes of system load issues or zombie processes.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
🚨LIVE NOW!🚨 DevOps/SRE Instructor Livestream
On this lovely Thursday, let's chat about #Linux #SystemAdministration, #SelfHosting, or any other topic in the #DevOps and #SRE space you're interested in!
monospacementor.com/live-stream/
Use `set -euo pipefail` for more robust bash/zsh scripts. Exit on errors (-e), treat undefined variables as errors (-u), catch pipe failures (-o pipefail).
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
Well Shit
Well Shit
#linux #bash #sudo #Rm-rf #Systemadministration
https://programmerhumor.io/linux-memes/well-shit-dzyx
On #Linux, `/var/log` is for troubleshooting, `/var/lib` contains app data, and `/var/cache` stores temporary files. When disk space runs low, you know which directories are safe to clean.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
🚨LIVE NOW!🚨 DevOps/SRE Instructor Livestream
On this lovely Thursday, let's chat about #Linux #SystemAdministration, #SelfHosting, or any other topic in the #DevOps and #SRE space you're interested in!
monospacementor.com/live-stream/
Before Fedora updates, check changes with `dnf check-update` and review `dnf history`. Use `dnf versionlock` to prevent specific packages from auto-updating.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
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. #Linux #SystemAdministration #SysAdmin
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. #Linux #SystemAdministration #SysAdmin
Shell tip: `${var%suffix}` removes the shortest matching suffix. `${var%%suffix}` removes the longest. `${var#prefix}` and `${var##prefix}` work the same for prefixes. Mnemonic: # comes before % on the keyboard. #Linux #SystemAdministration #SysAdmin
Putting All Your Eggs In One Basket
Putting All Your Eggs In One Basket
#devops #Backup #Disasterrecovery #Servercrash #Systemadministration
programmerhumor.io/devops-memes/putting-all...
