Jochen Lillich
@geewiz.dev
I'm a greybeard geek and IT operations black belt. #DevOps and #SRE trainer/mentor. German living in #Ireland. Likes #Linux, #Ruby and #MechanicalKeyboards. He/him.
Design pattern insight: The Single Responsibility Principle means each function should do one thing well. If you struggle to name a function without using "and," it probably does too much.
December 24, 2025 at 3:57 PM
Design pattern insight: The Single Responsibility Principle means each function should do one thing well. If you struggle to name a function without using "and," it probably does too much.
"Programs must be written for people to read, and only incidentally for machines to execute." - Harold Abelson. Write code that tells a story, not just solves a problem.
December 24, 2025 at 11:05 AM
"Programs must be written for people to read, and only incidentally for machines to execute." - Harold Abelson. Write code that tells a story, not just solves a problem.
Testing fundamentals: Write tests that describe behaviour, not implementation. Test "user can login with valid credentials" rather than “password hash function returns true.” #Testing #SoftwareEngineering #TDD
December 24, 2025 at 8:12 AM
Testing fundamentals: Write tests that describe behaviour, not implementation. Test "user can login with valid credentials" rather than “password hash function returns true.” #Testing #SoftwareEngineering #TDD
📖 Interesting read: "IT Should Stop Cork-Sniffing Tools and Get Back to Engineering Basics"
dev.to/leonpennings...
#softwareengineering
dev.to/leonpennings...
#softwareengineering
December 23, 2025 at 3:57 PM
📖 Interesting read: "IT Should Stop Cork-Sniffing Tools and Get Back to Engineering Basics"
dev.to/leonpennings...
#softwareengineering
dev.to/leonpennings...
#softwareengineering
Seeking a supportive environment to enhance your #DevOps knowledge? With "The Server Room", I offer an inclusive space for professionals to connect, learn, and grow together. Join us, and take your skills to new heights!
➜ monospacementor.com/devops-learn...
➜ monospacementor.com/devops-learn...
DevOps learning community > The Monospace Mentor
The Server Room is a DevOps learning community that focuses on boosting the skills and careers of its members.
monospacementor.com
December 23, 2025 at 11:05 AM
Seeking a supportive environment to enhance your #DevOps knowledge? With "The Server Room", I offer an inclusive space for professionals to connect, learn, and grow together. Join us, and take your skills to new heights!
➜ monospacementor.com/devops-learn...
➜ monospacementor.com/devops-learn...
⭐️ Interesting project: github.com/simonjwright...
The Embedded Web Server is designed for use in embedded systems with limited resources (eg, no disk). It supports both static (converted from a standard web tree, including graphics and Java class files) and dynamic pages. It is written in GCC Ada.
The Embedded Web Server is designed for use in embedded systems with limited resources (eg, no disk). It supports both static (converted from a standard web tree, including graphics and Java class files) and dynamic pages. It is written in GCC Ada.
December 23, 2025 at 8:12 AM
⭐️ Interesting project: github.com/simonjwright...
The Embedded Web Server is designed for use in embedded systems with limited resources (eg, no disk). It supports both static (converted from a standard web tree, including graphics and Java class files) and dynamic pages. It is written in GCC Ada.
The Embedded Web Server is designed for use in embedded systems with limited resources (eg, no disk). It supports both static (converted from a standard web tree, including graphics and Java class files) and dynamic pages. It is written in GCC Ada.
Linux tip: For troubleshooting network issues, `ss -tuln` shows all listening ports and services. Faster than `netstat` and comes pre-installed on modern systems. #Linux #SystemAdministration
December 22, 2025 at 3:57 PM
Linux tip: For troubleshooting network issues, `ss -tuln` shows all listening ports and services. Faster than `netstat` and comes pre-installed on modern systems. #Linux #SystemAdministration
Version control best practice: Write commit messages that complete the sentence "If applied, this commit will..." This creates clear, actionable descriptions of what each change does. #Git #VersionControl
December 22, 2025 at 11:05 AM
Version control best practice: Write commit messages that complete the sentence "If applied, this commit will..." This creates clear, actionable descriptions of what each change does. #Git #VersionControl
Use `systemctl mask servicename` to completely prevent service starts - stronger than `disable`. Masked services can't start accidentally. Use `systemctl unmask` when needed.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
Basic Linux System Administration (LINSYS-1) > The Monospace Mentor
Basic Linux System Administration (LINSYS-1) Boost Your System Administration Career With Expert-Led Training Want to get into DevOps/SRE? It all starts with Linux. Every cloud server, every DevOps pipeline,...
monospacementor.com
December 22, 2025 at 8:12 AM
Use `systemctl mask servicename` to completely prevent service starts - stronger than `disable`. Masked services can't start accidentally. Use `systemctl unmask` when needed.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
New Basic Linux System Administration post in The Server Room: "New section: sudo alternatives" community.monospacementor.com/t/306
If you'd like to benefit from our community's knowledge, join us: monospacementor.com/devops-learn...
If you'd like to benefit from our community's knowledge, join us: monospacementor.com/devops-learn...
December 20, 2025 at 8:12 AM
New Basic Linux System Administration post in The Server Room: "New section: sudo alternatives" community.monospacementor.com/t/306
If you'd like to benefit from our community's knowledge, join us: monospacementor.com/devops-learn...
If you'd like to benefit from our community's knowledge, join us: monospacementor.com/devops-learn...
December 19, 2025 at 3:57 PM
⭐️ Interesting project: github.com/omarluq/term...
🍮 A minimalistic API for writing text-based user interfaces in pure Crystal
🍮 A minimalistic API for writing text-based user interfaces in pure Crystal
December 19, 2025 at 11:05 AM
⭐️ Interesting project: github.com/omarluq/term...
🍮 A minimalistic API for writing text-based user interfaces in pure Crystal
🍮 A minimalistic API for writing text-based user interfaces in pure Crystal
⭐️ Interesting project: github.com/Blady-Com/UX...
Ada Unicode Extended Strings
Ada Unicode Extended Strings
December 19, 2025 at 8:12 AM
⭐️ Interesting project: github.com/Blady-Com/UX...
Ada Unicode Extended Strings
Ada Unicode Extended Strings
🚨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/
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/
December 18, 2025 at 6:02 PM
🚨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/
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/
New Basic Linux System Administration post in The Server Room: "New Cohort: 12 January 2026" community.monospacementor.com/t/305
If you'd like to benefit from our community's knowledge, join us: monospacementor.com/devops-learn...
If you'd like to benefit from our community's knowledge, join us: monospacementor.com/devops-learn...
December 18, 2025 at 3:57 PM
New Basic Linux System Administration post in The Server Room: "New Cohort: 12 January 2026" community.monospacementor.com/t/305
If you'd like to benefit from our community's knowledge, join us: monospacementor.com/devops-learn...
If you'd like to benefit from our community's knowledge, join us: monospacementor.com/devops-learn...
December 17, 2025 at 11:05 AM
📖 Interesting read: "Mix and match Linux distributions with Distrobox"
lwn.net/Articles/104...
#linux #containers #systemadministration
lwn.net/Articles/104...
#linux #containers #systemadministration
December 17, 2025 at 8:12 AM
📖 Interesting read: "Mix and match Linux distributions with Distrobox"
lwn.net/Articles/104...
#linux #containers #systemadministration
lwn.net/Articles/104...
#linux #containers #systemadministration
My newsletter, "News From the Server Room", comes with a column on a specific topic, updates from my #DevOps membership community, and links to interesting engineering content.
Subscribe for free: monospacementor.com/devops-know-...
Subscribe for free: monospacementor.com/devops-know-...
DevOps know-how > The Monospace Mentor
Practical DevOps know-how, delivered weekly. Expert commentary on recent issues, learning opportunities and reading recommendations.
monospacementor.com
December 16, 2025 at 11:05 AM
My newsletter, "News From the Server Room", comes with a column on a specific topic, updates from my #DevOps membership community, and links to interesting engineering content.
Subscribe for free: monospacementor.com/devops-know-...
Subscribe for free: monospacementor.com/devops-know-...
Elevate your #DevOps skills in "The Server Room" – my community dedicated to fostering growth and collaboration. Join us, engage in discussions, seek advice, and participate in workshops led by industry experts!
➜ monospacementor.com/devops-learn...
➜ monospacementor.com/devops-learn...
DevOps learning community > The Monospace Mentor
The Server Room is a DevOps learning community that focuses on boosting the skills and careers of its members.
monospacementor.com
December 16, 2025 at 8:12 AM
Elevate your #DevOps skills in "The Server Room" – my community dedicated to fostering growth and collaboration. Join us, engage in discussions, seek advice, and participate in workshops led by industry experts!
➜ monospacementor.com/devops-learn...
➜ monospacementor.com/devops-learn...
Use setgid on shared directories: `chmod g+s /shared/project`. New files inherit group ownership, preventing permission chaos when multiple users collaborate.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration #SysAdmin
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration #SysAdmin
Basic Linux System Administration (LINSYS-1) > The Monospace Mentor
Basic Linux System Administration (LINSYS-1) Boost Your System Administration Career With Expert-Led Training Want to get into DevOps/SRE? It all starts with Linux. Every cloud server, every DevOps pipeline,...
monospacementor.com
December 15, 2025 at 3:57 PM
Use setgid on shared directories: `chmod g+s /shared/project`. New files inherit group ownership, preventing permission chaos when multiple users collaborate.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration #SysAdmin
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration #SysAdmin
Never trust untested backups. With Borgmatic, use `borgmatic check --verbosity 2` for repository integrity and `borgmatic extract --dry-run` to simulate restores. Schedule monthly tests.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
Basic Linux System Administration (LINSYS-1) > The Monospace Mentor
Basic Linux System Administration (LINSYS-1) Boost Your System Administration Career With Expert-Led Training Want to get into DevOps/SRE? It all starts with Linux. Every cloud server, every DevOps pipeline,...
monospacementor.com
December 15, 2025 at 11:05 AM
Never trust untested backups. With Borgmatic, use `borgmatic check --verbosity 2` for repository integrity and `borgmatic extract --dry-run` to simulate restores. Schedule monthly tests.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration
📖 Interesting read: "omg.lol is the Internet We Need Right Now"
blog.brennanbrown.ca/omg-lol-is-t...
#socialmedia
blog.brennanbrown.ca/omg-lol-is-t...
#socialmedia
December 15, 2025 at 8:12 AM
📖 Interesting read: "omg.lol is the Internet We Need Right Now"
blog.brennanbrown.ca/omg-lol-is-t...
#socialmedia
blog.brennanbrown.ca/omg-lol-is-t...
#socialmedia
🚨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/
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/
December 11, 2025 at 6:01 PM
🚨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/
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/
⭐️ Interesting project: github.com/antonk52/mar...
Markdown like keymaps for toggling text formatting
Markdown like keymaps for toggling text formatting
December 11, 2025 at 8:12 AM
⭐️ Interesting project: github.com/antonk52/mar...
Markdown like keymaps for toggling text formatting
Markdown like keymaps for toggling text formatting
New General post in The Server Room: "Setting up soju as an IRC Bouncer" community.monospacementor.com/t/302
If you'd like to benefit from our community's knowledge, join us: monospacementor.com/devops-learn...
If you'd like to benefit from our community's knowledge, join us: monospacementor.com/devops-learn...
December 10, 2025 at 3:57 PM
New General post in The Server Room: "Setting up soju as an IRC Bouncer" community.monospacementor.com/t/302
If you'd like to benefit from our community's knowledge, join us: monospacementor.com/devops-learn...
If you'd like to benefit from our community's knowledge, join us: monospacementor.com/devops-learn...