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 information of UUID for the filesystem will be identical for the original and cloned copy, therefore the UUID is no longer unique in /etc/fstab. The […]

How to Install and Setup Munin on CentOS 7

Munin is open source and free software for monitoring computer system, network monitoring and application infrastructure monitoring software. Munin offers monitoring and alerting for servers, switches, applications, and services. Munin can help system administrators to analyze the trend of the computer system whether it is experiencing problems or not. It can be an easier alternative […]

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 cumulative, meaning ZCS 8.6.0 Patch4 includes ZCS 8.6.0 Patch3, ZCS 8.6.0 Patch2 and ZCS 8.6.0 Patch1. These patch release notes provide information about the Zimbra […]

How to a Add and Remove User Account on RHEL 6/7, CentOS 6/7, Oracle Linux 6/7

This article will explain and share how to add and remove user account with useradd(add) and userdel (remove) from the command-line on linux RHEL 6/7, CentOS 6/7, Oracle Linux 6/7 server. 1. Adding a New User to an Linux¬†System. a) Get the useradd manual : # man useradd useradd – create a new user or […]