Linux Tutorials and Command Line Guides - Page 16

Learn how to check memory usage by process in Linux with tested ps, top, pmap, /proc, smaps_rollup, statm, free, and pidstat examples. Understand RSS, VSZ, PSS, USS, shared memory, and how to find the top …

Learn how Linux enforces memory limits inside containers using cgroups, how cgroup v1 and v2 differ, why tools disagree, and how Docker and Kubernetes map limits to the kernel.

Learn how to change username in Linux with usermod, rename the home directory, update the primary group, verify UID/GID ownership, and fix common username rename errors safely.

Learn how to check sudo access in Linux. Check if you or another user has sudo privileges with sudo -l, test sudo access non-interactively in a bash script with sudo -n, and list all sudo users, with real tested output.

Learn how to check disk space in Linux from the command line. Use df to check free space, du to check disk usage by folder, and find what is eating your storage, with real tested output and fixes for "No space left on …

Understand CPU, processor, socket, core, thread, hyper-threading, CPU cache, frequency scaling and Linux commands like lscpu, nproc, mpstat and cpupower with validated output.

Learn how to refresh network settings in Ubuntu after IP address, route, DNS, DHCP, Netplan, NetworkManager, or systemd-networkd changes. Includes safe remote-server workflow, tested verification commands, and practical …

Learn how to backup and restore Brave Browser profile data on Linux, including settings, bookmarks, session files, cache, profile paths, tar archives, checksums, and safe restore steps.

Learn how to install a specific package version with apt or apt-get on Ubuntu and Debian, list available versions, simulate installs safely, handle dependency conflicts, and hold or unhold package versions.

Learn how to add a Linux user to the sudo group on Ubuntu and Debian, use the wheel group on RHEL-based systems, verify sudo access, and avoid confusing group-based sudo with custom sudoers file rules.

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

Tested Linux commands to check thread count per process using proc task directories, proc status, ps NLWP/LWP, ps -T, top -H and pstree, plus system thread limits.

Tested Linux commands to show hidden files with ls, list only hidden files, find hidden files recursively, and check hidden file or directory size with du.

Step by Step instructions to install yarn on Linux and WIndows. Installation on Ubuntu (Debian based) and Rocky Linux (Red hat based) and Windows.

How to extract/unpack/uncompress the contents of the initramfs image on RHEL7 and RHEL8? How do I list initramfs image file content? How do I modify the contents of an initrd or initramfs? How do I view an initrd or …

In this article we learned how to properly perform a curl POST request with practical examples

There are two different versions of pip which you can install to solve the error i.e. pip command not found in Ubuntu 20.04 Linux. Step by Step instructions to fix pip command not found error.

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 repodata

Learn how to install XFCE on Ubuntu using multiple methods including minimal XFCE installation, full Xubuntu desktop setup, and GUI installation on Ubuntu Server. This guide also explains how to switch desktop …

When managing files and directories in Linux operating systems, there may be a need to know how many files are in a given directory. For example:

If you have not integrated Linux servers into a central user authentication such as LDAP/Active Directory, you will have to create local users many times.

Step by Step tutorial to configure samba active directory domain controller in CentOS 8 Linux. Install Windows AD alternative in Linux. Free domain controller software in Linux

How to use tar --strip-components and zip --junk-paths with examples to strip absolute path in Linux and Unix. Force unzip / zip not to create a subdirectory

Learn how to check CPU usage in Linux using top, htop, vmstat, mpstat, sar, and ps commands. Monitor CPU utilization, load, and processes in real-time with practical examples.

Learn how to grep exact match in Linux using the grep command. This tutorial explains how to match exact words, exact strings, and entire lines using options like -w and regex patterns. Includes practical grep examples …

Learn how to mount a USB drive in Linux using command line tools. This step-by-step guide explains how to identify USB devices, install required filesystem packages, mount USB drives manually, verify mount points, …

Learn how to use the Linux find -exec command with practical examples. This guide explains find exec syntax, running multiple commands, combining find exec with grep, sed, pipes, and shell scripts for powerful file …

We explore the different root cause for getting zsh: command not found: pip error in Linux and how to fix those errors.

How to create, read, modify, find and remove dashed filename and directories in Linux. Open and access files & directories starting with (dash) and double dash (--)

Step by step instructions to install phpMyAdmin on Rocky Linux 9 using 2 different methods.