How to Install PHP GD-library on CentOS
The PHP GD library is a graphics library that is used to create dynamic images on the web. It is an open-source and widely used library in PHP applications. However,…
How to Fix “-bash: vim: command not found” on CentOS and Ubuntu
In the realm of web server administration, encountering errors is a common occurrence. One such error that you might come across while using CentOS or Ubuntu is the “-bash: vim:…
How to Reset the Directory Manager Password on RHEL 7 / CentOS 7
In the digital world, it’s a common practice to remember passwords. However, due to the sheer number of passwords we need to remember, it’s not uncommon to forget one or…
How to Reset Forgotten Root Password on Linux RHEL 7 / CentOS 7
This short howto will explain the steps to reset a lost root password or to reset a forgotten root password on Linux RHEL 7 or CentOS 7. Basically, we will…
How to Update CentOS or Upgrade CentOS to the Latest Version
Recently, the latest version of CentOS 7.3 was released. All users of CentOS 7.0, 7.1 and 7.2 can upgrade their system to the most recent. This quick guide will explain…
How to Change UUID of Linux Partition on CentOS 7
UUID (Universally Unique IDentifier) should be unique and it is used to identify storage devices on a linux system. If you cloned a virtual machine from vCenter, the metadata containing…
How to Install and Setup Apache Web Server in Linux
1. Introduction of Web Server (Apache Web Server) A web server generally hosts the web content, and responds to requests for this content from web browsers such as Internet explorer,…
How to Change default runlevel in CentOS 7 / RHEL 7
In CentOS 7 and RHEL 7, the systemd process replaces the init process for starting services at boot time and also for changing the runlevels. It uses “targets” instead of…
How to Disable IPv6 on Redhat / CentOS 6 / CentOS 7
This howto will show you how to disable IPv6 on RHEL 6/7, CentOS 6, and CentOS7. IPv6 is enabled by default. In this article, I summarize 3 configuration which needs…
How to Install Zimbra Patch on CentOS 7
Many have asked me, did Zimbra Collaboration (ZCS) 8.6.0 Patch4 will include Patch1 to Patch3? Actually, if you read the release notes document, the answer is there. ZCS patches are…
CentOS is a widely used open-source operating system that is widely used in web hosting, server management, and other IT fields. If you need to install CentOS 7 on your…
How to Setup a Login Banner on a Linux system
A login banner is a message displayed to users before they log into a Linux system via SSH or the console. It can be used for legal purposes, security warnings,…