Blog
Apt Update vs Apt Upgrade: What’s the Difference?
Learn the crucial difference between apt update and apt upgrade commands. Discover why running them in the right order matters for Linux system security.
How to Use the Watch Command in Linux: Monitor Commands in Real Time
Learn how to use the watch command in Linux to monitor commands in real time. Real-world examples, essential options, and practical tips from 10+ years of sysadmin work.
How to Use the nohup Command in Linux: Run Processes That Survive Logout
Master the nohup command in Linux. Learn syntax, real-world examples, output redirection, and how nohup compares to screen, tmux, and disown for background processes.
How to Use top Command in Linux: The Real-Time Monitor Every Sysadmin Needs
Master the top command in Linux with real-world examples for monitoring CPU, memory, and processes. Complete guide with practical troubleshooting techniques for 2025.
How to Use curl Command in Linux: The Essential Tool for Every Sysadmin
Master the curl command in Linux with real-world examples for API testing, file downloads, and troubleshooting. Complete guide with practical use cases for 2025.
How to Use awk Command in Linux: Real-World Text Processing Examples
Master the awk command in Linux with practical examples for log analysis, CSV processing, and data extraction. Learn field separators, pattern matching, and real-world use cases.
How to Use sed in Linux: The Text Processing Tool Every Sysadmin Needs
Master the sed command in Linux with practical examples. Learn text processing, find-and-replace operations, and real-world use cases that every sysadmin needs.
How to Check Load Average in Linux: A Complete Guide
Learn how to check load average in Linux with uptime, top, and htop. Understand what the numbers mean, when to worry, and how to troubleshoot high load issues.
How to Use lsof Command in Linux: The Troubleshooting Tool That Saves Careers
Master the lsof command in Linux with real-world examples. Learn to troubleshoot network connections, find deleted files eating disk space, and solve production issues fast.
How to Check Hostname in Linux: The Command Every Admin Uses Daily
Learn how to check hostname in Linux using hostname, hostnamectl, and configuration files. Master FQDN lookups and hostname management for better server administration.
How to Mount a Disk in Linux: The Complete Guide Every Admin Needs
I’ll never forget the first time I had to mount an external drive in production at 2 AM. The backup ...
How to Check Listening Ports in Linux: The Security Command You Need to Know
Learn how to check listening ports in Linux using ss, netstat, and lsof. Master port monitoring for security and troubleshooting in 2025.
How to Check Network Speed in Linux: The Essential Guide Every Admin Needs
Learn how to check network speed in Linux using ethtool, speedtest-cli, and iperf3. Master bandwidth monitoring with real-world examples for 2025.
How to Use Traceroute in Linux: The Network Diagnostic Tool Every Admin Needs
I still remember the first time a user complained that “the internet was slow.” Fresh out of college, armed with ...
How to Check Linux Version: The Command Every Sysadmin Needs
Learn how to check Linux version and distribution using hostnamectl, /etc/os-release, and uname commands. Complete guide with practical examples for 2025.
How to Use Journalctl in Linux: The Log Command That Saved My Career
Learn how to use journalctl in Linux to troubleshoot problems and monitor services. Master filtering by time, service, and priority with real-world examples.
How to Use Rsync in Linux: The File Transfer Tool Every Sysadmin Relies On
Learn how to use rsync in Linux with this complete guide. Master file synchronization, remote transfers, backups, and avoid common mistakes that cost hours.
How to Configure UFW Firewall on Linux: The Complete Guide
Learn how to configure UFW firewall on Linux with this complete guide. Secure your Ubuntu or Debian server with simple commands, avoid common mistakes, and implement best practices.
How to Generate SSH Key in Linux: The Complete Security Guide
Learn how to generate SSH key in Linux with this complete guide. Set up Ed25519 keys, understand key-based authentication, and secure your servers against brute force attacks.
How to Check Systemd Service Status in Linux: The Complete Guide
Learn how to check systemd service status in Linux using systemctl commands. Master troubleshooting failed services, monitoring, and managing system services effectively.
