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Tecmint: Linux Howtos, Tutorials & Guides
  • Learn Linux
  • Linux Distros
    • Linux Distros for Beginners
    • Linux Distros for Experts
    • New Linux Distros
    • Linux Server Distros
    • Secure Linux Distros
    • CentOS Alternatives
    • RedHat Distributions
    • Debian Distributions
    • Ubuntu Distributions
    • Arch Linux Distros
    • Rolling Linux Distros
    • KDE Linux Distros
    • Linux Distros for Old PC
    • Linux Distros for Kids
    • Linux Distributions for Students
    • Linux Distros for Windows
  • Commands
    • A – Z Linux Commands
    • 100+ Linux Commands
  • Tools
  • Pro Courses
    • Bash Scripting
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    • AI for Linux
    • RHCSA Certification
    • RHCE Certification
    • LFCS Certification
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firewalld Tips

Open Port for IP Address in CentOS

How to Open Port for a Specific IP Address in Firewalld

How can I allow traffic from a specific IP address in my private network or allow traffic from a specific

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Linux Commands and Tools

How to Send a Message to Logged Users in Linux Terminal

How to Set and Unset Local, User and System Wide Environment Variables in Linux

CDIR – A Faster Way to Navigate Folders and Files on Linux

How to Count Number of Files and Subdirectories inside a Given Directory

3 Ways to List All Installed Packages in RHEL, CentOS and Fedora

Ways to Use ‘find’ Command to Search Directories More Efficiently

Linux Server Monitoring Tools

Mytop – A Useful Tool for Monitoring MySQL/MariaDB Performance in Linux

20 Best Linux Bandwidth Monitoring Tools for Network Analysis

How to Boost Linux Server Internet Speed with TCP BBR

Pyinotify – Monitor Filesystem Changes in Real-Time in Linux

How to Install Cacti with Cacti-Spine in Debian and Ubuntu

How to Install Icinga2 on RHEL, Rocky and AlmaLinux

Learn Linux Tricks & Tips

Translate rwx Permissions into Octal Format in Linux

How to Identify Working Directories Using Shell Characters and Variables

How to Convert Files to UTF-8 Encoding in Linux

How to Manage User Password Expiration and Aging in Linux

5 Command Line Tools to Find Files Quickly in Linux

How to Force User to Change Password at Next Login in Linux

Best Linux Tools

13 Most Used Microsoft Office Alternatives for Linux

Top 5 Open-Source OCR Tools for Linux in 2025

60 Must-Have Free and Open-Source Linux Tools for 2026

5 Must-Try AI Tools for Linux Users in 2024

10 Best API Gateways and Management Tools in 2024

8 Best IRC Clients for Linux in 2024

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