Linux
Linux Tutorials
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.
How to Check Memory Usage in Linux: The Complete Guide
Learn how to check memory usage in Linux using free, top, htop, and vmstat. Understand what the numbers mean, when to worry, and how to troubleshoot memory issues.
How to Check Network Interface in Linux: The Complete Guide
Master Linux network interfaces with ip, nmcli, and ethtool commands. Learn to troubleshoot connectivity issues and understand network interface names.
ls Command in Linux: The Complete Guide with Examples
Master the ls command in Linux with this complete guide. Learn essential options, advanced techniques, common mistakes, and real-world examples from 15 years of system administration.
How to Use Ping Command in Linux: Complete Guide with Examples
Master the Linux ping command for network troubleshooting. Learn ICMP basics, essential options, practical examples, and advanced techniques from a sysadmin with 10+ years experience.
How to Check CPU Usage in Linux: The Complete Guide
Master Linux CPU monitoring with top, htop, and mpstat. Learn to troubleshoot high CPU usage, understand load average, and identify performance bottlenecks.
How to Check Disk Usage in Linux: The Definitive Guide
Master Linux disk space management with df, du, and ncdu. Learn to find space hogs, troubleshoot disk full errors, and monitor usage like a pro.
How to Schedule Cron Jobs in Linux: Automate Like a Pro
Learn how to schedule cron jobs in Linux with this complete guide. Includes syntax examples, common mistakes to avoid, troubleshooting tips, and real-world automation patterns.
How to Check Open Ports in Linux: The Complete Guide
Learn how to check open ports in Linux with ss, netstat, lsof, and nmap. Complete guide with practical examples, troubleshooting tips, and security best practices for 2025.
