Dejan Panovski

Articles by Dejan Panovski

Apr 12, 2026 • 4 min read • series

How to Run Sudo Command Without Password

Configure the sudoers file or a drop-in file in /etc/sudoers.d to let a user or group run sudo commands without a password prompt.

Apr 11, 2026 • 7 min read

tmux Command in Linux: Sessions, Windows, and Panes

The tmux command lets you run persistent terminal sessions with multiple windows and panes. This guide covers creating and managing sessions, splitting panes, copy mode, and configuration.

Using tmux to manage terminal sessions, windows, and panes in Linux

Apr 11, 2026 • 10 min read

curl Command in Linux: Usage and Examples

The curl command transfers data to and from servers using HTTP, HTTPS, FTP, and other protocols. This guide covers downloads, headers, POST requests, verbose debugging, proxies, and API usage.

Using the curl command in Linux to transfer data and query APIs

Apr 11, 2026 • 6 min read • series

passwd Command in Linux: Change User Passwords

Use the passwd command to change your own or another user's password in Linux. Covers root password changes, password expiry with chage, and account locking.

Apr 10, 2026 • 5 min read

How to Force HTTPS using .htaccess

Redirect all HTTP traffic to HTTPS using Apache .htaccess rewrite rules, with examples for www and non-www domain handling.

Apr 10, 2026 • 6 min read

Docker Run Command with Examples

Practical examples of docker run covering detached mode, port publishing, volumes, environment variables, restart policies, and interactive shells.

Apr 9, 2026 • 4 min read

file Command in Linux: Determine File Types

Identify file types from the command line using the Linux file command. Covers basic usage, MIME types, compressed files, symlinks, and the magic database.

Terminal example showing the Linux file command identifying file types

Apr 9, 2026 • 6 min read

Chattr Command in Linux (File Attributes)

How to use chattr and lsattr to set and view file attributes in Linux, including immutable files, append-only logs, and recursive protection.

Apr 9, 2026 • 4 min read

How to Check Your Ubuntu Version

Find which Ubuntu version is installed on your system using the command line. Covers lsb_release, /etc/os-release, hostnamectl, and other methods.

Terminal commands used to check the Ubuntu version

Apr 9, 2026 • 9 min read

Debian vs Ubuntu Server: Which One Should You Use?

Side-by-side comparison of Debian and Ubuntu Server covering release cycles, package freshness, security, cloud support, and ease of setup to help you pick the right one.

Apr 8, 2026 • 6 min read

How to List Docker Containers

List running and stopped Docker containers with docker container ls and docker ps. Covers filtering, formatting output, showing sizes, and grabbing container IDs.

Terminal output showing running Docker containers with docker container ls

Apr 8, 2026 • 6 min read

Apache Commands: Manage and Troubleshoot Your Web Server

Quick reference for essential Apache commands on Linux. Covers service control, configuration testing, modules, virtual hosts, version info, and log files.

Terminal window showing common Apache service and configuration commands on Linux

Apr 8, 2026 • 6 min read

tail Command in Linux: View the End of Files and Follow Logs

Practical examples of the tail command for viewing the end of files, following logs in real time, and combining tail with grep and other tools.

Terminal window showing the tail command following a Linux log file in real time

Apr 7, 2026 • 9 min read

find Command in Linux: Search Files and Directories

The find command searches for files and directories by name, type, size, date, permissions, and more. This guide covers practical examples including wildcards, exec actions, and combining find with grep.

Using the find command to search for files and directories in Linux

Apr 7, 2026 • 5 min read

How to Extract (Unzip) tar.gz Files in Linux

Extract tar.gz and tgz archives with the tar command. Covers extracting to a directory, pulling specific files, wildcards, stdin piping, and listing archive contents.

Extracting tar.gz files in Linux with the tar command

Apr 7, 2026 • 5 min read

mkdir Command in Linux: Create Directories

The mkdir command creates directories in Linux from the command line. This guide covers creating single and multiple directories, nested paths with -p, setting permissions, and brace expansion.

Creating directories in Linux with the mkdir command

Apr 7, 2026 • 7 min read

env Command in Linux: Show and Set Environment Variables

The env command prints environment variables and runs programs with a modified environment. This guide covers env syntax, running commands with custom variables, clean environments, and portable shebangs.

Using the env command to show and set environment variables in Linux

Apr 6, 2026 • 11 min read

htop Command in Linux: Monitor Processes Interactively

htop is an interactive process viewer for Linux that shows CPU, memory, and swap usage in real time. This guide covers sorting, filtering, tree view, killing processes, and customizing the display.

Using the htop command to monitor processes interactively in Linux

Apr 6, 2026 • 7 min read

nohup Command in Linux: Run Commands After Logout

The nohup command keeps a process running after you log out or close the terminal. This guide covers syntax, background execution, output redirection, and how to manage nohup processes.

Using the nohup command in Linux to run commands after logout

Apr 4, 2026 • 4 min read

503 Service Unavailable Error: Causes and How to Fix It

The 503 Service Unavailable error means the server cannot handle your request. This guide explains what causes it and how to fix it on Nginx and Apache.