How to Reset the Directory Manager Password on RHEL 7 / CentOS 7
It is best practice to remember passwords, but because too many passwords, sometimes we forget. We are not encouraged to write the password on any paper or share the password…
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 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…
How to Change RunLevel on CentOS 7 / RHEL 7
Old method to change the runlevel via /etc/inittab in Redhat Enterprise Linux version and CentOS server has become obsolete on RHEL 7 and CentOS 7. This latest Linux operating system…
How to Install EPEL Yum Repository on Linux CentOS 7 / RHEL 7
Epel yum repository is an open source centos yum repository or rpm repository for developers and system administrators to perform the installation of RPM packages via yum on their virtual…
How to Remove / Uninstall Nginx on CentOS 7 / RHEL 7 / Oracle Linux 7
Nginx web server is alternative web server to Apache and Lighttpd. Nginx popularity now growing because it focuses on high concurrency, high performance while maintaining low memory usage. However, due…
How to Grant a New User to Root Privileges on CentOS 6 / CentOS 7
One recommended way to manage virtual private server (VPS) or a dedicated linux server is not using the root account as the main access for SSH login. This is because…
How to Create LVM in Linux CentOS 7 / RHEL 7 / Oracle Linux 7
Storage technology plays a important role in improving the availability, performance, and ability to manage Linux servers. One of the most useful and helpful technology to linux system administrator is…
Rescan SCSI Bus to Add or Remove a SCSI Devices on Linux
When you need to add a hard disk or network interface cards on the new VMware virtual machine on the production server, but you are not allowed to shutdown the…
How to Add a New Hard Disk Without Rebooting on CentOS 7/ RHEL 7
Normally when you have added new storage to a running Virtual machine, you probably won’t see the new storage automatically. This is because the SCSI bus to which the storage…
How to Prepare for Zimbra 8 Installation Prerequisites on RHEL 7/CentOS 7
Before we install Zimbra 8, I would recommend you to meet all of these requirements. Some software prerequisites should be installed first, then setup the DNS and MX records, provides…
How to Install Zimbra 8.6.0 on RHEL 7/CentOS 7
Zimbra 8.6.0 brings new features, improvements in Mail server and better web clients experience. Some that caught my attention was local lmtp client can communicate over ssl for mail server,…