Category

Linux Tutorials and Command Line Guides

Learn Linux with step-by-step tutorials, command line examples, and system administration guides for Ubuntu, RHEL, CentOS, and more.

Welcome to the Linux tutorials section, your complete resource for mastering Linux commands and system administration.

This category covers everything from basic commands to advanced system-level operations across multiple distributions such as Ubuntu, RHEL, and CentOS.

Linux is the backbone of modern infrastructure, and understanding it is essential for DevOps, cloud computing, and system administration. You may also explore System Administration and Security for advanced topics.

What you will learn

  • Essential Linux commands and tools
  • File system and process management
  • User and permission management
  • Real-world troubleshooting techniques

Ideal for

  • Beginners learning Linux
  • System administrators
  • DevOps engineers

332 articles

Hand-picked, most-cited tutorials — start here if you're new.

How do I install the Linux library libc.so.6

How do I install the Linux library libc.so.6

In this tutorial we learn how do I install the linux library libc.so.6. There are 3 possible scenarios: …

By Omer Cakmak · 5 min read
How to check the lock status of any user account in Linux

How to check the lock status of any user account in Linux

In this article I will share different methods to check the lock status of a user in Linux or Unix …

By Deepak Prasad · 4 min read
How to install Anydesk on AlmaLinux 8 [Step-by-Step]

How to install Anydesk on AlmaLinux 8 [Step-by-Step]

Step by step instructions to install anydesk on almalinux 8 with screenshot and examples

By Deepak Prasad · 3 min read
Downgrade Ubuntu to previous version?

Downgrade Ubuntu to previous version?

Step by Step instructions to download Ubuntu to previous release

By Omer Cakmak · 5 min read

5 effective ways to unlock user account in Linux

How to unlock the password for user account in Linux. If an account is locked due to login failure then use pam_tally2 or pam_fallock to unlock user account.

By Deepak Prasad · 9 min read · linux

9 easy steps to create custom ISO RHEL/CentOS 8

To create custom ISO in RHEL/CentOS 8, create a kickstart file and modify the isolinux.cfg for boot menu. You can also minimze the package list and update …

By Deepak Prasad · 15 min read · linux

6 Tools making Automation Testing easy in Linux

The QA automation testing tools mentioned in this article enable the deployment of tests integrated with the DevOps workflow. They support continuous testing …

By Deepak Prasad · 5 min read · linux

SSH port forwarding | SSH Tunnel (Forward & Reverse)

Configure SSH Port forwarding tunneling between local and remote host in Linux. Example SSH session to forward port 8080 with ssh connection RHEL/CentOS

By Deepak Prasad · 19 min read · linux

How to Check Linux Kernel Version from Command Line

Learn how to check Linux kernel version with tested uname, hostnamectl, procfs, journalctl, dmesg, boot image, dpkg, and apt commands, and understand the …

By Deepak Prasad · 8 min read · linux

How to properly remove old kernels RHEL/CentOS 8

You can now use dnf command to remove old kernels from RHEL/CentOS 8 Linux. package-cleanup doesn't work any more. Use oldinstallonly with installonly_limit

By Deepak Prasad · 5 min read · linux