IT & Systems

Discover IT tutorials on computer systems, networking, servers, hosting, and system management.

  • Username is not in the sudoers file this incident will be reported

    Username is not in the sudoers file this incident will be reported

    Username is not in the sudoers file this incident will be reported, it is a common error message when a non sudo user tried to make some sudo command. To fix this you need to…

  • Best Linux laptops for Linux-friendly users

    Best Linux laptops for Linux-friendly users

    For many people, patent computer operating systems like Windows and Mac OS are not quite liberal with their operations and functions. While the Mac OS is restricted to Apple computers, Windows operating systems, to fuel…

  • 10 Best Laptops with Linux Pre-Installed That You Can Buy Right Now

    10 Best Laptops with Linux Pre-Installed That You Can Buy Right Now

    There are a few places to buy purpose-built Linux laptops but they can cost you more than the Windows notebooks. Three companies offer Linux preinstalled laptops, and other companies offer you repackaged systems from HP, Lenovo,…

  • Optimize MySQL Databases to Improve Query Performance

    Optimize MySQL Databases to Improve Query Performance

    A slow MySQL database can make even a powerful server feel weak. Pages load slowly, APIs take longer to respond, admin panels freeze during heavy operations, and CPU usage suddenly spikes without any obvious reason.…

  • Install cPanel WHM on CentOS 7 RHEL and CloudLinux

    Install cPanel WHM on CentOS 7 RHEL and CloudLinux

    In this tutorial we will install cPanel and WHM on CentOS 7 or on RHEL and CloudLinux Platforms. In tutorial I have used DigitalOcean as web server. You can choose any of managed or unmanaged…

  • How to hide PHP version?

    How to hide PHP version?

    PHP is an open-source web scripting language that is widely used to build dynamic web pages. But its default installation leaves a hack and unneeded information called PHP version as X-Powered-By: PHP/X.x.x which help hackers to target…

  • How to reset MySQL root password?

    How to reset MySQL root password?

    If you are using Linux and ever lose your MySQL root password or never set a root password and are now unable to access it, so don’t worry, there is an easy way to reset…

  • Apache vs. Nginx: Selection of a Perfect Web Server

    Apache vs. Nginx: Selection of a Perfect Web Server

    About Apache and Nginx Both Apache and Nginx is web-server software, that enables us to host website on a public internet. Introduction of Apache Apache is said to be the leading HTTP server software available…

  • Nginx Performance Tuning

    Nginx Performance Tuning

    In this tutorial, we’ll see Nginx Performance Tuning tips for all major Linux distributions like Debian, CentOS, Ubuntu, and many more. Nginx is the best alternative to overbearing Apache in terms of serving more numbers…