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 Fix GNOME License Not Accepted Issue on CentOS 7

This post assume that you have just finished the Gnome GUI installation on CentOS 7 by using “yum groupinstall “GNOME Desktop” “Graphical Administration Tools” -y” command. Previously you are running a minimum CentOS 7, only with command line via terminal. But after you reboot the server you get the following screen. Initial setup of CentOS […]

How to Install and Setup Apache Tomcat 8 on CentOS 7 / RHEL 7

What is Tomcat Server and What is Apache Tomcat used for ? Apache Tomcat version 8 is an open source web server and servlet container developed by the Apache Software Foundation (ASF). It provides a web server environment for Java based source code and used to deploy Java Servlets and JSPs. Basically Apache is an […]

How to Install JAVA 8 (JDK 8u45) on CentOS 6 / CentOS 7

The JDK is a development tool for building applications, applets, and components using the Java programming language . It includes a useful tool for developing and testing programs written in the Java programming language and runs on the Java platform. You can go through this document to know more about new enhancement of Java JDK […]

How to Adjust the Zimbra Maximum Message and Upload Size via CLI

This article show you how to check and adjust the maximum message size and upload size to an email via the Zimbra MTA (Postfix). The default Postfix message_size_limit was 10MB (10240000 bytes) and the message_size_limit postconf parameter is configured globally for all zimbra MTAs. Q. How to Adjust the Zimbra Maximum Message and Upload Size […]

How to Show Mailbox Size on Zimbra via Bash Script

Q. How to show mailbox Size on Zimbra via bash script ? A. There are two script available to show mailbox size of the zimbra users : Option A 1. Create the scripts directory to keep the bash file and give zimbra ownership to the folder : # mkdir -p /opt/zimbra/backup/scripts # chown -R zimbra:zimbra […]

How to Show Mailbox Size on Zimbra via Command Line

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 […]

Nginx Released Version Nginx 1.8.x

Nginx is lightweight fast web server/reverse proxy and e-mail (IMAP/POP3) proxy. On 21 Apr 2015, nginx has release the stable branch version, 1.8.x which includes many new features from the 1.7.x mainline branch – including hash load balancing method, backend SSL certificate verification, experimental thread pools support, proxy_request_buffering and more. : Changes with nginx 1.8.0 […]

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