How to Grep Multiples Lines and using Specific Keyword on Linux

linux

grep is a command line text search utility originally written for Unix or linux. In linux you can grep multiple lines before or after matching the keywords. This examples has been tested on linux CentOS 6.2, but it may workings on other linux version such as Redhat Enterprise Linux 5 (RHEL5) or (RHEL6). Get grep […]

How to Configure Bind Chroot DNS Server on Linux CentOS 5.7 Server

In this post, i will guide you on how to configure Bind Chroot DNS server on Linux CentOS 5.7 Server. DNS is the Domain Name System that maintains a database that can help user’s computer to translate domain names such as www.ehowstuff.com to IP addresses such as 184.173.214.97. DNS on CentOS is based on the […]

How to Fix “Port conflict detected: 80 (zimbra-store)” During Zimbra 7.1.3 Mail Server Installation on Linux CentOS 5.7

zimbra

Question : I am facing same problem during Zimbra 7.1.3 Mail Server Installation on Linux CentOS 5.7. What should ido to fix this ? Error message : Checking for port conflicts Port conflict detected: 80 (zimbra-store) Port conflicts detected! – Any key to continue Answer : What you should do is these : 1. Cancel […]

How to Install Bind Chroot DNS Server on Linux CentOS 5.7 Server

DNS is the Domain Name System that maintains a database that can help user’s computer to translate domain names such as www.ehowstuff.com to IP addresses such as 184.173.214.97. DNS on CentOS is based on the named daemon, which is built on the BIND package developed through the Internet Software Consortium. (More information is available from […]

How to Open the File in Read Only Mode on Linux

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Question : How to open a file on read only mode on linux? Answer : This command has been tested on Redhat Enterprise linux 6 (RHEL6) server. To open the file with vim in read only mode on linux, you need to run “vim -R” as below. Vim is enhanced version of vi editor that […]

How Display Logged in User Information and Terminal number on Linux Server

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In this post i will show on how to display logged in user information and terminal number on Linux server. This post provides practical examples for future references. This steps has been tested on Redhat Linux Enterprise server 6 and may working CentOS server as well. 1. “who am i” command is use to display […]

How to Install Zimbra Collaboration Suite 7.1.3 Mail Server on Linux CentOS 5.7

zimbra

In this post, i will share with you on how to install zimbra open source mail server on linux CentOS 5.7. According to wikipedia, Zimbra Collaboration Suite (ZCS) is a groupware product created by Zimbra, Inc. It was located in Palo Alto, California, USA. In September 2007, The company was purchased by Yahoo! and subsequently […]

How to Remove iptables on Linux RHEL 5/CentOS 5 server

Iptables is used to set up, maintain, and inspect the tables of IPv4 packet filter rules in the Linux kernel. It can run as a host based firewall if properly configured. Iptables places rules into predefined chains (INPUT, OUTPUT and FORWARD) that are checked against any network traffic packets. In certain case, system administrator will […]

How to Install iptables on Linux RHEL 5/CentOS 5 server

Iptables is used to set up, maintain, and inspect the tables of IPv4 packet filter rules in the Linux kernel. It can run as a host based firewall if properly configured. Iptables places rules into predefined chains (INPUT, OUTPUT and FORWARD) that are checked against any network traffic packets. In this post i will show […]

How to Disable iptables on Linux CentOS 5.7 Server

Iptables is used to set up, maintain, and inspect the tables of IPv4 packet filter rules in the Linux kernel. It can run as a host based firewall if properly configured. Iptables places rules into predefined chains (INPUT, OUTPUT and FORWARD) that are checked against any network traffic packets. In certain case, system administrator will […]

How to Install man Pages Command on CentOS 5.7

Man pages are a common way to learn the commands that are on your system. The man command will give you all the details of a given command, including switches used, and syntax. man formats and displays the on-line manual pages. This post will show the quick steps to install man command on linux CentOS […]