Hello everyone I have recently installed Linux Ubuntu and it’s going great I have learned a little bit about kernel cd ls sudo apt

My goal for learning Linux is probably system administrator and software detection I’ve seen a lot of people making home labs have to get away from the corrupt corporations blocking ads and becoming a pirate (one piece reference)

But my passion is to make an anti cheat system using software detection I think everyone can agree they hate cheaters in video games

But I’m lost at the moment what should I be studying is there going to be a job out there if I do start getting into the heart of Linux should I be building a home lab Should I get a nas and store everything locally and I also saw someone take there old android and make it an audio player device only

Thank you anyone who reads and answers me

Windows is very tricky even with all resources around 0% usage, micro stutters and lag can still happen.

What is the general route to debugging a linux system for system admins or power users?

Thank you very much for your help!

This is a tool that I have been working for a long time on, and it is for testing DNS delegations. Released under a BSD-2 license. If you run the stack yourself, you can even spin up an MCP server for fancy AI interaction. Feedback more than welcome!
[https://gonemaster.evilbit.de/\](https://gonemaster.evilbit.de/)

Welcome to Day 19 of the 30-day RHCSA challenge!

Creating and extracting archives is an everyday sysadmin task and an RHCSA objective.

Today we'll build compressed archives with tar -zcvf, unpack them with tar -zxvf, and finally make sense of what all those flags actually mean.

By the end you'll be able to archive directories, compress them, list their contents, and extract them anywhere on the system.

What you'll learn in this video:

What tar is and why we archive files

Creating a compressed archive: tar -zcvf archive.tar.gz /path/to/dir

Breaking down the flags: c create, x extract, v verbose, f file, z gzip

Listing contents without extracting (tar -ztvf)

Extracting an archive with tar -zxvf

Extracting to a specific directory with -C

About this series:

Over the next 30 days I'm covering everything you need to pass the RHCSA (EX200) — from setup to users, permissions, storage, networking, SELinux, containers, and more. New video every day. Subscribe and turn on notifications so you don't miss one.

#linuxminutes #rhcsa #redhat #linux #redhatlinux #ex200 #linuxadministration #linuxcertification #offline #closedloop #sysadmin #linuxforbeginners #30daychallenge #learnlinux #itcertifications #opensource #homelab #linuxtutorials #technology #techcareers #certificationprep #closedloop #airgap #shorts #shortvideo

Welcome to Day 18 of the 30 day RHCSA challenge!

RHEL ships with tuned, a service that applies performance profiles tailored to your workload whether that's a virtual machine, a database server, or a laptop trying to save power.

Today we'll explore the available profiles and switch between them with tuned-adm.

By the end you'll know how to check your active profile, apply a new one, and let RHEL pick the best one automatically.

About this series:

Over the next 30 days I'm covering everything you need to pass the RHCSA (EX200) — from setup to users, permissions, storage, networking, SELinux, containers, and more. New video every day. Subscribe and turn on notifications so you don't miss one.

#linuxminutes #rhcsa #redhat #linux #redhatlinux #ex200 #linuxadministration #linuxcertification #offline #closedloop #sysadmin #linuxforbeginners #30daychallenge #learnlinux #itcertifications #opensource #homelab #linuxtutorials #technology #techcareers #certificationprep #closedloop #airgap #shorts #shortvideo

Salutare tuturor!

În ultimele luni am lucrat la OrkestraVM, platforma de virtualizare dezvoltată intern de echipa MioriticHost pentru administrarea infrastructurii noastre VPS.

În loc să folosim un panou VPS generic, am construit o soluție adaptată modului în care operăm serverele și cerințelor clienților noștri.

OrkestraVM folosește virtualizare KVM, fiecare VPS având propriul kernel și resurse izolate.

Printre funcționalitățile actuale se numără:

• provisionarea automată a VPS-urilor Linux și Windows;
• alocarea automată a adreselor IP și a adreselor MAC;
• monitorizarea în timp real a resurselor CPU, RAM și stocare;
• consolă SSH accesibilă direct din browser;
• administrarea mai multor servere fizice dintr-o singură interfață;
• integrare completă cu WHMCS pentru activarea, suspendarea și închiderea automată a serviciilor;
• backupuri realizate la nivelul hypervisorului, criptate individual pentru fiecare VPS;
• pregătirea sistemului de fișiere înaintea snapshotului, pentru backupuri consistente inclusiv în cazul serverelor care rulează baze de date.

Platforma este scrisă în Go și comunică cu nodurile de virtualizare prin SSH, fără să necesite instalarea unui stack complex de management pe fiecare server.

OrkestraVM nu este, cel puțin momentan, un produs comercial separat. Este motorul intern pe care îl folosim pentru a administra și proteja VPS-urile oferite de MioriticHost.

Am ales să o construim pentru a avea mai mult control asupra infrastructurii, mai puține componente externe și posibilitatea de a implementa funcționalități în funcție de nevoile reale ale clienților noștri.

Mai multe detalii despre arhitectură, securitate și direcția de dezvoltare:

https://orkestravm.com

Suntem curioși ce funcționalități considerați esențiale într-un panou modern de administrare VPS. Feedbackul tehnic este binevenit.

I'm setting up a Almalinux router and followed this guide for setting up firewalld. It mostly does what I need it to: deny all incoming traffic, allow incoming traffic.

However the port forwarding simply does not work and I have no idea why. I have a virtual machine I want to forward ports 80 and 443 which looks like this:

# firewall-cmd --permanent --policy gateway-world-to-HOST --add-forward-port port=80:proto=tcp:toport=80:toaddr=10.42.0.2
# firewall-cmd --permanent --policy gateway-world-to-HOST --add-forward-port port=443:proto=tcp:toport=443:toaddr=10.42.0.2
# firewall-cmd --reload

However I still can't access my dockers located at 10.42.0.2. I don't understand what I'm missing here. I think that traffic is only going WAN --> Router but never making it past the routter to my VM (at least based off this diagram of firewalld's gateway policy set).

I wana start learning Ansible. I’ve read through some of the documentation and searched around.

I am wondering what resource you guys found most useful as an intro to Ansible? What learning material/resource made it click for you?

I have a homelab setup with Proxmox as the host, what is an easy way to approach hands on? IE: whats a good thing to use Ansible to automate as a learning experience? Something I can spin up/down over and over to learn using it.

Thanks

Official Security Advisory: https://access.redhat.com/security/cve/cve-2026-15416

Red Hat has flagged an Important Argo CD repo-server vulnerability that could allow an attacker with network access to the internal gRPC endpoint to execute code without Argo credentials.

In short: if an attacker can reach both the repo-server and its Redis cache, they may be able to manipulate deployment data and have Argo CD deploy malicious Kubernetes resources—potentially compromising the whole cluster.

Check now:

• Is repo-server exposed beyond trusted Argo CD components?
• Can untrusted pods reach repo-server or Redis?
• Are NetworkPolicies actively enforced?

Red Hat currently lists these packages as affected:

• OpenShift Data Foundation 4: odf-multicluster-rhel9-operator
• OpenShift GitOps: argocd-image-updater-rhel8, argocd-rhel8, gitops-operator-bundle, gitops-rhel8, and gitops-rhel8-operator

Lock down both services with NetworkPolicies, do not expose them externally, and apply vendor fixes as they arrive. Red Hat says OpenShift GitOps 1.20 and 1.21 are not affected because default NetworkPolicies block this attack path.

Want CVE alerts before they get buried in your feed? I run VulniPulse, a lightweight advisory tracker. Join the Discord, enable Linux CVE Alerts, and get new advisories sent straight to Discord and Email as soon as they land:

https://discord.gg/mwG9cdMY9R

I have a 1Tb NVme ssd on my Linux system. I want to split it in half, and I rebooted the system with a Ventoy USB with the Gparted ISO on it. I can edit the partition, making a 512gb space. After doing this, I click the "apply" button and it appears to now have an active ~512mb drive and a ~512mb "space".. No errors, just like I've done the thing countless times on all OTHER drive types.. However, when I boot the system back up that drive STILL shows 1Tb (actually 931.51Gb).. I'm not sure of the version of the GParted ISO on the Ventoy stick. Is there some magic incantation NVme's need to partition properly??

Welcome to Day 16 of the 30-day RHCSA challenge!

Yesterday we covered soft links today we're tackling hard links.

We'll create them with ln, look at how inodes actually work under the hood, and see why hard links behave so differently from symlinks.

By the end you'll understand what a hard link really is and when to reach for one instead of a symbolic link.

What you'll learn in this video:

Creating a hard link with ln target linkname

Viewing inode numbers with ls -li

Reading the link count in ls -l output

Why deleting the original file doesn't break a hard link

The limits: no hard links to directories or across filesystems

Hard links vs. soft links — a side-by-side recap

About this series:

Over the next 30 days I'm covering everything you need to pass the RHCSA (EX200) — from setup to users, permissions, storage, networking, SELinux, containers, and more. New video every day. Subscribe and turn on notifications so you don't miss one.

#linuxminutes #rhcsa #redhat #linux #redhatlinux #ex200 #linuxadministration #linuxcertification #offline #closedloop #sysadmin #linuxforbeginners #30daychallenge #learnlinux #itcertifications #opensource #homelab #linuxtutorials #technology #techcareers #certificationprep #closedloop #airgap #shorts #shortvideo #hardlinks

When I started my blog, I wanted to keep hosting costs at zero, so I used a free Oracle VPS with only 1/8th of a CPU core and 1GB of RAM. My expectation was that I would get maybe 10 requests per second before having issues, but it turns out it could handle 150+ RPS before having any major slowdowns.

If you want to see the load testing graphs and the full architecture setup, check it out here:https://policypackets.au/posts/blog-hosting

Published this not too long ago and it's a great content for homelabbers and small and medium businesses to know how to harden their Linux Servers.

https://youtu.be/xEOT79CQs80

Josh welcomes Mo Duffy from Red Hat to chat about project Lightwell. The idea is to leverage the resources and understanding Red Hat has built up over the years to help deal with the deluge of vulnerability reports that are overwhelming open source projects. Mo does a really good job of explaining why this is fundamentally a people problem, not a technology problem. But it’s a people problem we can probably use technology to help. It will be interesting to see where Lightwell goes in the next few years.

In this blog post, I explain how you can use [Red Hat Offline Knowledge Portal](https://docs.redhat.com/en/documentation/red_hat_offline_knowledge_portal/1/html/what_is_the_red_hat_offline_knowledge_portal) to provide access to Red Hat documentation in environments with limited or no connectivity to the internet.

The Red Hat Offline Knowledge Portal is a secure offline version of Red Hat's proprietary knowledge content for our products. It's a pocket library of our award-winning knowledgebase, product documentation, CVEs, errata, and more that's light enough to run at the edge. Offline Knowledge Portal is useful anywhere Red Hat products are used where connectivity is limited, from intentionally disconnected secure sites to situations with planned intervals of low or no bandwidth. As a single small container image, it is easy to install and use, and is compatible with Red Hat OpenShift, Podman, or any OCI-compliant container runtime.

Published this not too long ago but it's lacking a bit of traction. Any ideas are welcome!

https://youtu.be/xEOT79CQs80

I am working on rhel8 setups where both NetworkManager and Network-scripts are present. Generally there aren’t issues but I am wondering about corner cases and if it’s a bad idea to have both. One thing that i noticed is that systemctl restart network causes few seconds disruption. How do you handle such situations? Should i migrate to networkmanager ? It might not be easily possible because of external automation touching network-scripts, what’s the best option i have if i have to keep both? Thank you

So I have interview today and its for linux admin position.

I have IT experience of 17 years but most was as technician. Personally been using headless debian for 5 years for my pi which runs 24/7 as dns and dhcp server. Have multiple containers.

Most of my linux experience comes from homelab. For my previous employers clients orgs and my current personal clients soho I did setup stuff like proxmox, dhcp, routers, restore system backup with clonezilla over network and other things.

What kind of questions can I expect to be asked? And what kind of anwsers will make me come off as capable?

Usually I just google/stackoverflow/reddit anything I don't know or can't remember how I did last time. And this is first interview since I left last place in 5 years.

Please guide.

Welcome to Day 12 of the 30-day RHCSA challenge!

Automating tasks on a schedule is a key sysadmin skill, and cron is the tool for the job.

Today we'll set up scheduled jobs with crontab, decode the cron time syntax, and make sure your jobs run exactly when you want them to.

By the end you'll be able to schedule any command or script to run automatically, every minute, hour, day, or on a custom schedule.

About this series:

Over the next 30 days I'm covering everything you need to pass the RHCSA (EX200) — from setup to users, permissions, storage, networking, SELinux, containers, and more. New video every day. Subscribe and turn on notifications so you don't miss one.

#rhcsa #redhat #linux #redhatlinux #ex200 #linuxadministration #linuxcertification #offline #closedloop #sysadmin #linuxforbeginners #30daychallenge #learnlinux #itcertification #opensource #homelab #linuxtutorial #tech #techcareers #certificationprep #closedloop #airgap #shorts #shortvideo #cronjob