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How to Install cPanel/WHM in RHEL/CentOS 6/5
Posted by Helpdesk System on 28 March 2016 04:50 PM

cPanel is one of the most popular Commercial control panel for Linux web hosting,  It comes with cPanel and Web Host Manager, which makes web hosting easier for you. WHM provides you root level access to your server whereas cPanel provides user level access interface to manage their own web hosting account on the server.

Install Cpanel in Linux


Features of cPanel

cPanel control panel is very versatile control panel for managing your hosting servers, It has lots of features which make Web hosting easier for you. Some of them are listed below:

  1. Powerful GUI controls on your server with WHM.
  2. Can perform tedious tasks like Backups, Migrations and restorations in a very easy and smooth manner.
  3. Excellent DNS and mail server management for main server and as well as client account.
  4. Can easily switch/enable/disable services for server.
  5. Can configure SSL/TLS for all server services and client domains.
  6. Easy integration with Phpmyadmin to provide a web based interface to manage your MySQL databases.
  7. Feel free to Rebrand it.
  8. Can be easily integrated with WHMCS to automate billing management.

Here In this article, We’ll be covering cPanel & WHM installation on RHEL/CentOS 6.5 and share some more useful information which will help you to manage cPanel & WHM.

Installation Prerequisites

  1. A fresh and running VPS or dedicated CentOS 6.5 server.
  2. A minimum of 384MB RAM.
  3. A Minimum 20GB of free disk space required for cPanel installation.
  4. A cPanel license.

Installation of cPanel in RHEL/CentOS 5/6

First insure that OS version on which your Linux box is running, To do so, please use following command.


[root@vps ~]# cat /etc/redhat-release

CentOS release 6.6 (Final)

If you don’t have the latest version, please update your OS to its latest version, In CentOS and RHEL, we can simply do it with yum package installer.


[root@vps home]# yum update

Once you’ve ensured the OS version, you don’t have to install any other dependency package cPanel auto installer script does all for you. We can download cPanel installer file with wget command under/home directory.

[root@vps home]# cd /home

[root@vps home]#  wget -N

Sample Output:

--2016-02-24 11:35:18--

Resolving,,, ...

Connecting to||:80... connected.

HTTP request sent, awaiting response... 301 Moved Permanently

Location: [following]

--2016-02-24 11:35:19--


Connecting to||:443... connected.

HTTP request sent, awaiting response... 200 OK

Length: 25320 (25K)

Saving to: “latest”


100%[===================================================================================================================>] 25,320       127K/s   in 0.2s


2016-02-24 11:35:20 (127 KB/s) - “latest” saved [25320/25320]


[root@vps home]# ll

total 28

-rw-r--r--. 1 root root 25320 Dec 31 00:54 latest


To  make the screening continuously do following steps:

[root@vps home]# yum install screen

Loaded plugins: fastestmirror, security

Setting up Install Process

Loading mirror speeds from cached hostfile

 * base:

 * epel:

 * extras:

 * updates:

Resolving Dependencies

--> Running transaction check

---> Package screen.x86_64 0:4.0.3-18.el6 will be installed

--> Finished Dependency Resolution


Dependencies Resolved



 Package                             Arch                                Version                                     Repository                         Size



 screen                              x86_64                              4.0.3-18.el6                                base                              494 k


Transaction Summary


Install       1 Package(s)


Total download size: 494 k

Installed size: 795 k

Is this ok [y/N]: y

Downloading Packages:

screen-4.0.3-18.el6.x86_64.rpm                                                                                                        | 494 kB     00:02

Running rpm_check_debug

Running Transaction Test

Transaction Test Succeeded

Running Transaction

  Installing : screen-4.0.3-18.el6.x86_64                                                                                                                1/1

  Verifying  : screen-4.0.3-18.el6.x86_64                                                                                                                1/1



  screen.x86_64 0:4.0.3-18.el6



[root@vps home]#

In above output you can see that we have downloaded a file “latest” in our home directory.

Next, execute the auto installer script, but we strongly recommended to run cPanel auto installer script in screen mode if you are doing it with SSH because it takes 3-4+ hours to complete the installation depending on your server resources.


[root@vps home]#  screen

[root@vps home]# sh latest


Sample Output:

Verifying archive integrity... All good.
Uncompressing cPanel & WHM Installer..............
        ____                  _
    ___|  _ \ __ _ _ __   ___| |
   / __| |_) / _` | '_ \ / _ \ |
  | (__|  __/ (_| | | | |  __/ |
   \___|_|   \__,_|_| |_|\___|_|
Installer Version v00029 r6849459174e3809f72de2bef81427a8a45399d66
Beginning main installation.

You can detach the screen from auto-installation using Ctrl+A then press D.

Sample output:

2016-02-24 12:44:22  225 ( INFO): cPanel install finished in 47 minutes and 20 seconds!

2016-02-24 12:44:22  958 ( INFO): Congratulations! Your installation of cPanel & WHM 11.54 is now complete. The next step is to configure your server.

2016-02-24 12:44:22  958 ( INFO):

2016-02-24 12:44:22  958 ( INFO): Before you configure your server, ensure that your firewall allows access on port 2087.

2016-02-24 12:44:22  958 ( INFO): On RHEL, CentOS, and CloudLinux systems, execute /scripts/configure_firewall_for_cpanel to accomplish this.

2016-02-24 12:44:22  958 ( INFO):

2016-02-24 12:44:22  958 ( INFO): After ensuring that your firewall allows access on port 2087, you can configure your server.

2016-02-24 12:44:22  958 ( INFO):

2016-02-24 12:44:22  958 ( INFO): 1. Open your preferred browser

2016-02-24 12:44:22  958 ( INFO):

2016-02-24 12:44:22  958 ( INFO): 2. Type in the address bar

2016-02-24 12:44:22  958 ( INFO):

2016-02-24 12:44:22  958 ( INFO): 3. Enter the word root in the Username text box

2016-02-24 12:44:22  958 ( INFO):

2016-02-24 12:44:22  958 ( INFO): 4. Enter your root password in the Password text box

2016-02-24 12:44:22  958 ( INFO):

2016-02-24 12:44:22  958 ( INFO): 5. Click the Login button

2016-02-24 12:44:22  958 ( INFO):

2016-02-24 12:44:22  958 ( INFO): Visit for more information about first-time configuration of your server.

2016-02-24 12:44:22  958 ( INFO):

2016-02-24 12:44:22  958 ( INFO): Visit or for additional support

2016-02-24 12:44:22  958 ( INFO):

2016-02-24 12:44:22  958 ( INFO): Thank you for installing cPanel & WHM 11.54!

2016-02-24 12:44:22  829 ( WARN): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

2016-02-24 12:44:22  830 ( WARN): Your system kernel may have been updated.

2016-02-24 12:44:22  831 ( WARN): Current kernel (2.6.32-504.el6.x86_64) has been changed to: 2.6.32-573.18.1.el6.x86_64

2016-02-24 12:44:22  832 ( WARN): Before rebooting the system, please ensure that the installed kernel version is compatible with your deployment.

2016-02-24 12:44:22  842 ( WARN): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!



What Auto Installer Script Does for You

cPanel heavily modifies your operating system and that is the reason that no cPanel Uninstalleravailable on the web so far, you need to reformat your server to remove cPanel completely from your server.

  1. It checks for various packages to ensure that there will be no conflicts and it finds any package conflict, it uninstalls previous packages with yum and that’s why its recommended to install cPanel on a Fresh OS.
  2. Downloads language and base files for installation.
  3. Installs various Perl modules through CPAN and other required packages with yum.
  4. Downloads and compiles PHP and Apache with various associated modules.

Once that script completes its installation, it will shows up that cPanel installation is complete. You may be asked to reboot the server after installation.

After that you need to complete the installation wizard from its web based interface and you can access WHM with the following URL.

URL: https://Your-Server-IP-Address:2087/

Please login with user “root” and your password. There are some more clicks remaining to complete the cPanel installation. Agree End User License Agreement by clicking “I Agree?/Go to Step 2” button:

cPanel Login


Please login with user “root” and your password. There are some more clicks remaining to complete the cPanel installation.


Step 1: Agree End User License Agreement by clicking “I Agree?/Go to Step 2” button:

Accept cPanel Agreement

Step 2: Please do provide the working email address and contact SMS address in the column of “Server Contact Email Address” and                       “Server contact SMS address” respectively because your cPanel sends all important alerts, notification to this EMail-id                               (Recommended). You can fill the rest details as well, if you have one.


Step 3: Please provide a valid FQDN hostname and Resolver entries for your server in this Networking section, you can use Google resolvers in this section if you don’t have your ISP’s resolvers. Please see the image below.


Step 4: If you have more than one IP attached with your NIC card and you want to set up a specific IP for your Server’s main IP, you can do that from here, to do so please choose the IP from the drop down and click on “Go to Setup 4”.


Step 5: In the 4th setup wizard, you can select DNS server which you want to use. You can choose one of them according to their Advantages, disadvantages and your server resources. Please read the comparison carefully and select the DNS server. Please see the image below.

Setup Name Servers


Step 6: In the same step, please write down Name Servers you want to use in format of ns1/ Also, Add an A entry for your hostname and nameserver by selecting the check box, please see the image below.

Add Name Server


Step 7: You can select and set up different services like FTPMail and Cphulk in the Step 5 of this web based wizard, please see the snapshots and description below.

 You can select FTP server of your choice from this wizard, which you want to use for your server depending on their advantages, disadvantages and depending upon your ease and requirements.

FTP Configurationq

Step 8: In the same wizard, you can select your Mail server to be used for all your mailing activities in future. You can add MTAs like Exim with your cPanel in future.

Mail Configuration


Step 9: Cphulk brute force protection detects and block false password attacks activities and block their IP for your server. You can enable/disable and configure it from this installation wizard. Please see the snapshot below.

Setup Cphulk Brute Force Protection

Last Step 6, allows you to enable quotas which helps you to track down the disk space usages.

Setup User Quotas


Please select “Use file system quotas” and click on “Finish setup wizard” to complete the Installation process. Once you are done with Installation, WHM’s home page will Appear like below..

cPanel Server Configuration


Sometimes, cPanel installer script is not able to update the license because of firewall or resolvers entries and you’ll see trial warning in the page. You can do it manually with following command.

root@server1 [~]# /usr/local/cpanel/cpkeyclt


Other Useful thing to know before you start working with Cpanel and WHM.

CPanel Backend Files

  1. Cpanel directory : /usr/local/cpanel
  2. Third Party tools : /usr/local/cpanel/3rdparty/
  3. Cpanel addons directory : /usr/local/cpanel/addons/
  4. Base files like Phpmyadmin, skins : /usr/local/cpanel/base/
  5. cPanel binaries : /usr/local/cpanel/bin/
  6. CGI files : /usr/local/cpanel/cgi-sys/
  7. Cpanel access & error log files : /usr/local/cpanel/logs/
  8. Whm related files : /usr/local/cpanel/whostmgr/

Important conf files

  1. Apache configuration file: /etc/httpd/conf/httpd.conf
  2. Exim mail server conf file:/etc/exim.conf
  3. Named conf file : /etc/named.conf
  4. ProFTP and Pureftpd conf file :/etc/proftpd.conf and /etc/pure-ftpd.conf
  5. Cpanel user file: /var/cpanel/users/username
  6. Cpanel configuration file (Tweak settings) : /var/cpanel/cpanel.config
  7. Networking configuration file: /etc/sysconfig/network
  8. Addons, parked and subdomain information: /etc/userdomains
  9. Cpanel update config file: /etc/cpupdate.conf
  10. Clamav conf file: /etc/clamav.conf
  11. Mysql configuration file: /etc/my.cnf
  12. PHP ini conf file : /usr/local/lib/php.ini



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