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.
Is growing your Dev/Ops skills important to you? My no-fluff newsletter has my “Mentor Monologue” column, news from my #DevOps membership community, and a bunch of useful reading recommendations.
monospacementor.com/devops-know-...
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
November 24, 2025 at 3:57 PM
Is growing your Dev/Ops skills important to you? My no-fluff newsletter has my “Mentor Monologue” column, news from my #DevOps membership community, and a bunch of useful reading recommendations.
monospacementor.com/devops-know-...
monospacementor.com/devops-know-...
Are you chewing on a tricky DevOps question? I’m a veteran SRE with decades of experience who’s happy to help! Members of The Server Room can simply hop on my monthly Office Hour video calls and get useful advice.
Sign up here: theserverroom.sh
Sign up here: theserverroom.sh
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.
theserverroom.sh
November 24, 2025 at 11:05 AM
Are you chewing on a tricky DevOps question? I’m a veteran SRE with decades of experience who’s happy to help! Members of The Server Room can simply hop on my monthly Office Hour video calls and get useful advice.
Sign up here: theserverroom.sh
Sign up here: theserverroom.sh
Document changes with `history | tail -10` to capture recent commands, then add explanations. Future you (and colleagues) will thank you during troubleshooting.
🔗 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
November 24, 2025 at 8:12 AM
Document changes with `history | tail -10` to capture recent commands, then add explanations. Future you (and colleagues) will thank you during troubleshooting.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration #SysAdmin
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration #SysAdmin
⭐️ Interesting project: github.com/codiewio/cod...
🐳 Codenire — Code Playground (backend) based on Docker images with Google gVisor isolation. Extensible and customizable via API. PostgresQL supported for each language ... Web UI will be soon
🐳 Codenire — Code Playground (backend) based on Docker images with Google gVisor isolation. Extensible and customizable via API. PostgresQL supported for each language ... Web UI will be soon
November 23, 2025 at 8:12 AM
⭐️ Interesting project: github.com/codiewio/cod...
🐳 Codenire — Code Playground (backend) based on Docker images with Google gVisor isolation. Extensible and customizable via API. PostgresQL supported for each language ... Web UI will be soon
🐳 Codenire — Code Playground (backend) based on Docker images with Google gVisor isolation. Extensible and customizable via API. PostgresQL supported for each language ... Web UI will be soon
New Basic Linux System Administration post in The Server Room: "Course livestream recording 2025-11-20" community.monospacementor.com/t/299
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...
November 21, 2025 at 8:12 AM
New Basic Linux System Administration post in The Server Room: "Course livestream recording 2025-11-20" community.monospacementor.com/t/299
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...
🚨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/
November 20, 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/
New Events post in The Server Room: "Community Hangout" community.monospacementor.com/t/296
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...
November 19, 2025 at 11:05 AM
New Events post in The Server Room: "Community Hangout" community.monospacementor.com/t/296
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...
New Events post in The Server Room: "Office Hour - Ask Me Anthing!" community.monospacementor.com/t/295
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...
November 19, 2025 at 8:12 AM
New Events post in The Server Room: "Office Hour - Ask Me Anthing!" community.monospacementor.com/t/295
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...
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
November 18, 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-...
I’ve been a system administrator since 1993 and made running Linux servers my business. If you’d like to get better at system administration, get support in my membership community!
➜ 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
November 18, 2025 at 8:12 AM
I’ve been a system administrator since 1993 and made running Linux servers my business. If you’d like to get better at system administration, get support in my membership community!
➜ monospacementor.com/devops-learn...
➜ monospacementor.com/devops-learn...
Check `ss -tuln` for open ports. Add `| grep :80`, for example, to filter specific services. You'll get clearer output and better performance than with the outdated `netstat`.
🔗 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
November 17, 2025 at 3:57 PM
Check `ss -tuln` for open ports. Add `| grep :80`, for example, to filter specific services. You'll get clearer output and better performance than with the outdated `netstat`.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration #SysAdmin
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SystemAdministration #SysAdmin
"Writing tests first forces a modicum of reusability to be built into an object from its inception; it would otherwise be impossible to write tests at all. Therefore, novice designers are best served by writing test-first code." (Sandi Metz, "Practical Object-Oriented Design")
November 17, 2025 at 11:05 AM
"Writing tests first forces a modicum of reusability to be built into an object from its inception; it would otherwise be impossible to write tests at all. Therefore, novice designers are best served by writing test-first code." (Sandi Metz, "Practical Object-Oriented Design")
A habit of taking notes is tremendously useful. (I wish I had started it decades earlier. 😥) Sharing your notes makes them even more useful. That’s why you can find all my DevOps and SRE notes published on my website.
Take a look: mspc.sh/wiki
Do you have your own wiki? Post a link!
Take a look: mspc.sh/wiki
Do you have your own wiki? Post a link!
Wiki - Monospace Mentor Wiki
Welcome to the Monospace Mentor wiki! 👋 I'm Jochen Lillich, the Monospace Mentor, and this is my wiki. It's a collection of notes I'm curating during my daily work as a leader, practitioner and educ…
mspc.sh
November 17, 2025 at 8:12 AM
A habit of taking notes is tremendously useful. (I wish I had started it decades earlier. 😥) Sharing your notes makes them even more useful. That’s why you can find all my DevOps and SRE notes published on my website.
Take a look: mspc.sh/wiki
Do you have your own wiki? Post a link!
Take a look: mspc.sh/wiki
Do you have your own wiki? Post a link!
⭐️ Interesting project: github.com/zirconium-de...
Opinionated Niri bootc image
Opinionated Niri bootc image
November 16, 2025 at 8:12 AM
⭐️ Interesting project: github.com/zirconium-de...
Opinionated Niri bootc image
Opinionated Niri bootc image
⭐️ Interesting project: github.com/vitor-marian...
A simple TUI to visualize regular expressions right in your terminal.
A simple TUI to visualize regular expressions right in your terminal.
November 14, 2025 at 8:12 AM
⭐️ Interesting project: github.com/vitor-marian...
A simple TUI to visualize regular expressions right in your terminal.
A simple TUI to visualize regular expressions right in your terminal.
Looking for a safe and friendly #DevOps #community? Join "The Server Room" – where knowledge meets collaboration. Gain insights, ask questions, and advance your career in the supportive environment I've created for you.
➜ 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
November 11, 2025 at 11:05 AM
Looking for a safe and friendly #DevOps #community? Join "The Server Room" – where knowledge meets collaboration. Gain insights, ask questions, and advance your career in the supportive environment I've created for you.
➜ monospacementor.com/devops-learn...
➜ monospacementor.com/devops-learn...
Is growing your Dev/Ops skills important to you? My no-fluff newsletter has my “Mentor Monologue” column, news from my #DevOps membership community, and a bunch of useful reading recommendations.
monospacementor.com/devops-know-...
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
November 11, 2025 at 8:12 AM
Is growing your Dev/Ops skills important to you? My no-fluff newsletter has my “Mentor Monologue” column, news from my #DevOps membership community, and a bunch of useful reading recommendations.
monospacementor.com/devops-know-...
monospacementor.com/devops-know-...
My usual recommendation for a new workstation or laptop was “something like a Tuxedo or Framework” until I bought a used T480 for my son. Now, I recommend buying a refurbished computer. Reusing is superior to even the most sustainable and repairable new machine.
November 10, 2025 at 3:57 PM
My usual recommendation for a new workstation or laptop was “something like a Tuxedo or Framework” until I bought a used T480 for my son. Now, I recommend buying a refurbished computer. Reusing is superior to even the most sustainable and repairable new machine.
Use `sed -n '100,200p' largefile.txt` to extract specific line ranges without loading the entire file into memory. Much faster than `head -200 | tail -100` for large files or when targeting middle sections.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SysAdmin
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #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
November 10, 2025 at 11:05 AM
Use `sed -n '100,200p' largefile.txt` to extract specific line ranges without loading the entire file into memory. Much faster than `head -200 | tail -100` for large files or when targeting middle sections.
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SysAdmin
🔗 Learn more in my course: monospacementor.com/courses/lins...
#Linux #SysAdmin
"Here, then, are the guidelines for what to test: Incoming messages should be tested for the state they return. Outgoing command messages should be tested to ensure they get sent. Outgoing query messages should not be tested." (Sandi Metz, Practical Object-Oriented Design)
November 10, 2025 at 8:12 AM
"Here, then, are the guidelines for what to test: Incoming messages should be tested for the state they return. Outgoing command messages should be tested to ensure they get sent. Outgoing query messages should not be tested." (Sandi Metz, Practical Object-Oriented Design)
⭐️ Interesting project: github.com/Termix-SSH/T...
Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities.
Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities.
November 9, 2025 at 8:12 AM
⭐️ Interesting project: github.com/Termix-SSH/T...
Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities.
Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities.
New General post in The Server Room: "Web App Multi Tenancy" community.monospacementor.com/t/292
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...
November 8, 2025 at 8:12 AM
New General post in The Server Room: "Web App Multi Tenancy" community.monospacementor.com/t/292
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...
New Virtualization post in The Server Room: "Looks like we have an interesting Proxmox contender!" community.monospacementor.com/t/291
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...
November 7, 2025 at 11:05 AM
New Virtualization post in The Server Room: "Looks like we have an interesting Proxmox contender!" community.monospacementor.com/t/291
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...
New Deployment post in The Server Room: "Docker Container Secrets" community.monospacementor.com/t/289
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...
November 5, 2025 at 3:57 PM
New Deployment post in The Server Room: "Docker Container Secrets" community.monospacementor.com/t/289
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...
New THRIVE Membership post in The Server Room: "The Ultimate Show and Tell?" community.monospacementor.com/t/288
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...
November 5, 2025 at 11:05 AM
New THRIVE Membership post in The Server Room: "The Ultimate Show and Tell?" community.monospacementor.com/t/288
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...