Linux Inside: The Ideal Blog for Sysadmins & Geeks

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[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

🚀 Pro TecMint now has 16 Linux courses live!

🟢 Beginner:

Learn Linux in 7 Days → https://t.co/deTl6ZidAB
100+ Essential Linux Commands → https://t.co/A2ILSmh5Ko
11 Best Linux Distributions → https://t.co/dAMZrpv7zZ
Linux Interview Handbook → https://t.co/lxVR6UvGNp
SSH Complete Course → https://t.co/M6zgrQxQqN

🔵 Advanced:

AI for Linux → https://t.co/sfpxrrY3nx
Bash Scripting → https://t.co/jA18Cs0cAY
Ubuntu Handbook → https://t.co/Edtkv2l06c
Linux Performance Monitoring → https://t.co/ZyZx8yHZke
Golang for DevOps → https://t.co/ncUWjJjjZe
Claude for Linux → https://t.co/U3vHa3qzcB

🏆 Certifications:

RHCSA → https://t.co/OO5hFroNAn
RHCE → https://t.co/IxFnlDdJ20
LFCS → https://t.co/C0yuQjD6vM
LFCA → https://t.co/zRblgdSwDY

All courses included in the Root plan at $8/month or $59/year. Lifetime access at $199 one-time.

👉 https://t.co/uCl3wUIdop

#Linux #SysAdmin #DevOps

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

Most sysadmins reload Nginx without reviewing the configuration first, then discover problems only after the site goes down.

In Chapter 13 of our #ClaudeCode for #Linux #Sysadmins course, you'll learn how to use Claude Code to identify syntax errors and security misconfigurations in your Nginx and Apache configurations, and build a repeatable pre-reload review process for both.

Read it here → https://t.co/GwU2tz3LkA

Follow @tecmint for a new chapter every week. 🚀

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

In Chapter 37 of our SSH course, you'll learn how SSH connection multiplexing works, how ControlMaster, ControlPath, and ControlPersist reuse a single connection

You'll also learn when multiplexing is safe to use, when to disable it, and how to selectively enable it only for the hosts where it makes sense.

Read it here → https://t.co/UQJbC8NhMi

Follow @tecmint for new #SSH chapters every week.

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

The at command lets you queue a one-off task to run once at a specific time, so you don’t have to write and then remember to delete a cron entry for something you only need to run once.

👉 https://t.co/EAcNE8ILXm

Follow @tecmint for more #Linux tips.

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

Most Linux users know how to search for files.

Very few know how to track recent file activity, investigate unexpected changes, or quickly identify what was modified before a problem appeared.

If you want to understand file management, troubleshooting, permissions, and practical Linux administration beyond the basics:

100+ Essential Linux Commands
https://t.co/A2ILSmh5Ko

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

💡Quick Linux Tip #22

You accidentally deleted something and want to know what was removed recently.

Run:

find ~/ -type f -mtime -1

This shows files that were modified in the last day.

While it won't recover deleted files, it can help you identify recent changes and missing files.

It's often useful when troubleshooting user mistakes.

Follow @tecmint for more #Linux tips

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

The term web server refers to both hardware and software, but for this guide, we focus entirely on the software side: how to host a website on your Linux system using #Apache, #MariaDB, #WordPress, and #DuckDNS for free.

👉 https://t.co/5h5SDmx38b

Follow @tecmint for more #Linux tips.

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

Your Linux server’s network is maxed out, and you have no idea what’s eating it, so here’s how to find the exact program behind it in under 2 minutes using nethogs, iftop, ss, and the /proc filesystem.

👉 https://t.co/8PyTeIcNOG

Follow @tecmint for more #Linux tips.

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

Most Linux users run commands and wait for them to finish.

Very few know how to measure exactly how long a command takes or identify slow operations during real production work.

If you want to understand Linux performance, command timing, system monitoring, and troubleshooting techniques:

100+ Essential Linux Commands
https://t.co/A2ILSmh5Ko

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

💡 Quick Linux Tip #21

A command is taking forever to finish, and you're not sure if it's still working.

Run it with:

time command

For example:

time cp largefile.iso /backup

When the command finishes, Linux shows how long it took to complete.

It's a simple way to measure performance.

Follow @tecmint for more #Linux tips

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

Your #RHEL 10 servers don’t need more patching.

They need images.

Build once with bootc, run it in a VM, ship it to physical machines, and roll back in seconds when updates break things.

Full guide 👇
https://t.co/ykrZ8yUQjM

Follow @tecmint for weekly #Linux content.

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

Most Linux users know how to edit configuration files.

Very few know how to quickly find which config files were recently modified during troubleshooting, deployments, or system changes.

If you want to understand how Linux tracks file changes and efficiently investigate configuration issues:

100+ Essential Linux Commands
https://t.co/A2ILSmh5Ko

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

💡 Quick Linux Tip #20

You edited a config file yesterday, but now you can't remember which one.

Try this:

find /etc -type f -mtime -1

This shows files inside /etc that were changed in the last 24 hours.

Instead of checking every configuration file, Linux helps you find the recently modified ones.

The -mtime -1 part means "changed within the last day."

Follow @tecmint for more #Linux tips

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

Follow @tecmint to improve your Linux skills with articles, courses, ebooks, and CLI tips.

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

Most Linux users know how to use Linux.

Very few know how to troubleshoot a server when disk space suddenly disappears at 2 AM.

If you want to learn the commands used during real production incidents:

100+ Essential Linux Commands
https://t.co/Oab62WWFvJ

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

💡 Quick Linux Tip #19

Your disk is almost full, but you can't figure out which folder is taking up all the space.
Here's a quick command:

du -sh * | sort -hr

This shows the size of each folder in your current directory.

Instead of opening folders one by one, Linux sorts them from largest to smallest.

The biggest folders appear at the top, making it easy to spot what's using your storage.

Follow @tecmint for more #Linux tips

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

Learn professional Linux disk I/O monitoring with over 20 essential and advanced tools to diagnose, optimize, and troubleshoot storage performance in production environments.

Read the full guide (Pro members only):

👉 https://t.co/0IG9Ft2cfu

Follow @tecmint for more #Linux #Ubuntu #DiskIO #Monitoring tutorials!

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

If you’ve ever tried setting up Ollama, Stable Diffusion, or PyTorch on an AMD graphics card, you probably remember how painful the process used to be.

Installing ROCm often meant adding third-party repositories, dealing with driver compatibility issues, and spending hours troubleshooting errors before anything actually worked.

👉 https://t.co/VGIVFyl17d

Follow @tecmint for more #Linux tips.

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

Most Linux users know how to check free disk space with df -h.

Very few know how to quickly identify the exact files and directories consuming that space during real production incidents.

If you want to understand where storage goes instead of guessing why a server is running out of disk space:

100+ Essential Linux Commands
https://t.co/A2ILSmgxUQ

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

💡Quick Linux Tips #18

Your disk is almost full, but you have no idea what's consuming the space.

Here's a quick way to find the biggest files and folders:

du -ah /var | sort -rh | head -20

This shows the 20 largest files and directories inside /var.

Instead of manually checking every folder, Linux sorts everything from largest to smallest so you can spot storage hogs immediately.

The -a option includes both files and directories, while sort -rh sorts sizes in human-readable format.

Follow @tecmint for more #Linux tips

[Linux Inside: The Ideal Blog for Sysadmins & Geeks @tecmint]

Most sysadmins have a folder of Bash scripts they didn't write and are afraid to touch.

In Chapter 12 of our #ClaudeCode for #Linux #Sysadmins course, you'll write a real backup script from scratch, have Claude review it for edge case bugs, and refactor an inherited log cleanup script with 10 real issues hiding in 12 lines.

Read it here → https://t.co/UFrOdkHq2Y

Follow @tecmint for a new chapter every week.