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 […]

How to Install and Configure TigerVNC Server on CentOS 7.1 / RHEL 7.1 / Oracle Linux 7

The following article explain how to Install and configure TigerVNC Server on CentOS 7.1 or Red Hat Enterprise Linux (RHEL 7.1) or Oracle Linux 7. TigerVNC (Tiger Virtual Network Computing) is a remote access utility that allows you to control other computers that running graphical desktop sharing in separate sessions in parallel. It is works […]

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 uses systemd system management daemon and relies on systemctl command in order to change the runlevel. RunLevel is set with linking to /etc/systemd/system/default.target. Please make […]

How to Show Mailbox Size on Zimbra via Command Line

Setup Zimbra Collaboration Suite 8.0.1

Q. How to show user mailbox size on zimbra via command line ? A. please issue the following command to show only the mailbox size on zimbra. 1. Display all users : $ zmprov gqu `zmhostname`|awk {‘print ” “$3” “$2” “$1’} Output : 384289 0 user1@ehowstuff.local 222445 0 admin@ehowstuff.local 25568 0 user2@ehowstuff.local 0 0 galsync.vtfk6uwt@ehowstuff.local […]