How to Use sed and awk to Modify Config Files in Linux
Linux configuration files are often plain text, which makes them easily editable using command-line tools. Among…
How Linux Services and Daemons Work (and How to Control Them)
When starting out with Linux, you may encounter the terms “services” and “daemons” quite frequently, which…
Master Linux in Just 7 Days – Even If You’re a Complete Beginner!
After the success of our RHCSA / RHCE and LFCS / LFCE certification books, we are…
Real-World Use Case: Healthcare Identity & Security with Azure Local, SDN, and Entra
Introduction Workflow 2: Telemedicine Visit Table of Contents Executive Overview Healthcare Security Challenges Solution Architecture Overview…
CrowdStrike Services Observes SCATTERED SPIDER Escalate Attacks Across Industries
SCATTERED SPIDER, an eCrime adversary, has recently broadened its target scope to include the aviation sector,…
Set Up Incremental Backups with rsync and cron on Linux
Backups are like insurance; you don’t need them every day, but when disaster strikes, such as…
How to Create a Simple IP Blocker Script Using iptables and Fail2Ban
Today, I’m going to show you a simple but effective way to automatically block suspicious IPs…
20 Daily Linux Commands System Administrators Use in Production
As a Linux SysAdmin working in a production environment, your daily routine is all about keeping…
How to Automate Daily Linux Health Checks with a Bash Script + Cron
Managing Linux servers daily can be fun and stressful, especially when you’re dealing with unexpected downtimes…
UFW Firewall: How to Install, Configure, and Use It on Ubuntu/Debian
Since computers are connected to each other, services are growing rapidly, with examples such as email,…
How to Install and Use Termius SSH Client on Linux
If you’re a Linux user, managing remote servers or networked devices via SSH (Secure Shell) is…
How to Secure Your Ubuntu Server with UFW, Fail2ban, and AppArmor
When setting up an Ubuntu server for production, securing the system is crucial to ensure its…
How to Create a Backup Script for Important Files in Linux
On a Linux system, having regular backups is critical to protect your data, keep it safe,…
Top 25 Network Ports You Must Know for Interviews
If you’re preparing for a networking, Linux system administration, DevOps, or cybersecurity interview, understanding network ports…
How to Force cp Command to Overwrite Without Confirmation in Linux
The cp command (short for copy) is one of the most commonly used commands in Linux…