How to Convert Standalone Apache to LiteSpeed

This wiki covers how to set up LSWS (either Enterprise or Standard editions) on a server that already has a working Apache installation but no control panel.

Step 1: Install LiteSpeed Speed Web Server

1.1 Download

Download LSWS tarball from the LiteSpeed Technologies website.

Run the following commands from ssh as root

cd /root

Note: Replace the values in the URL to control for your OS and which version/edition of LSWS you wish to download:

lsws-4.2.12-ent-x86_64-linux = LSWS Enterprise 4.2.12 for 64bit Linux

lsws-4.2.10-std-i386-linux = LSWS Standard 4.2.10 for 32bit Linux

lsws-4.2.12-ent-x86_64-freebsd6 = LSWS Enterprise 4.2.12 for 64bit FreeBSD 6.x

1.2 Unpack

tar zxfv  lsws-4.2.12-ent-x86_64-linux.tar.gz

1.3 Run the installation script

For Enterprise Edition, make sure to put the license file (trial.key or paid license file in the unpacked folder).

cd lsws-4.2.12

The installer will ask you a number of questions (covered in detail here). Choose the default setting when in doubt, but you have to set the same username and groupname as Apache for LiteSpeed process to run as (choosing LiteSpeed default setting nobody:nobody may create file permission problem):

  • LiteSpeed target install directory (/usr/local/lsws).
  • Assign the same username and group as Apache for LSWS to run as (You need to check with Apache configuration or Apache running process. It maybe nobody:nobody, apache:apache or www-data:www-data etc.)
  • Listen port (8088)(8088 is for sample testing site only. LSWS will automatically check Apache configuration for Listening port if “Load Apache Configure” selected as instructed below).
  • Default Web Admin Port:7080
  • Assign a username and password for LSWS web admin console.
  • Your email address as the Administrators email.

Step 2: Install PHP

Two options for setting up PHP for LiteSpeed, however the first one installation through packages from the repo is recommended.

  1. Recommended way: Enable the LiteSpeed repository and download LSPHP from our repository. See instructions here.You may have default php.ini file installed through RPMs and You just need to make some changes to match it to exiting Apache PHP. Check both phpinfo pages for difference.
  2. Not recommended way: If you are not using CentOS or you need PHP packages that are not included in our repository, you can build your own PHP from LiteSpeed Web Admin Console or from PHP source code. See more PHP compiling options and instructions here. You may need to create your own php.ini file for your compiled binary. It can be copied from your exiting Apache PHP configuration or from PHP source code package php.ini-production file. For example for Debain Apache2, you may run:
cp /etc/php5/apache2/php.ini /usr/local/lsws/lsphp5/lib/php.ini 

Of course, Apache php.ini location or LSPHP installation prefix may be different. You can easily change it accordingly.

Step 3: Load Apache Configuration in LSWS

Open LiteSpeed Web admin console, under “server”→“General” tab, change configurations in “Using Apache Configuration File” table.

Load Apache Configuration => Yes
Auto Reload On Changes => Use Apache Binary Wrapper 
Apache Configuration File => /usr/local/apache/conf/httpd.conf
Apache Port Offset => 2000 (Try LiteSpeed on port 2080 and 2443 first, change to 0 later, do NOT use 8088 or 8008)
Apache IP Offset => 0 
PHP suEXEC => Yes (Run PHP in suEXEC mode)
PHP suEXEC Max Conn => 5 (The maximum PHP processor each account can have)


  • “PHP suEXEC Max Conn” can be adjusted based how many and how big the sites has been hosted. For a server dedicated for a large Wordpress or vBulletin site, you can safely increase it to “10”, “15” or “20”, try different value and see what is the best for you.
  • Different system/platform, default Apache Configuration File is different. For example, for CentOS, it is located at /etc/httpd/conf/httpd.conf; for WHM/cPanel, it is /usr/local/apache/conf/httpd.conf; for Debian Apache2, it is /etc/apache2/apache2.conf.
  • We set Apache Port Offset ⇒ 2000 in this example but most of the time, you cannot test other ports since application backend URL with port has been set to 80 or 443, such as WordPress. In this case, you should set Apache Port Offset ⇒ 0 and make sure to stop apache before starting LSWS for testing. You can not run both Apache and LiteSpeed at the same time when Apache Port Offset ⇒ 0 .

Sometimes your Apache conf file may have environment parameters set in /etc/apache2/envvars or other locations, such as:


You have to include it in “Apache Environment” within “Using Apache Configuration File” table in the Web Admin Console.For example:


If LiteSpeed runs into some absolute path problem such as

[/etc/apache2/apache2.conf:250] Failed to get absolute path for [/usr/local/apache/ports.conf]!
2015-07-06 12:37:03.282 ERROR [/etc/apache2/apache2.conf:267] Failed to get absolute path for     [/usr/local/apache/conf.d/]!
2015-07-06 12:37:03.282 ERROR [/etc/apache2/apache2.conf:270] Failed to get absolute path for   [/usr/local/apache/sites-enabled/]!
2015-07-06 12:37:03.582 ERROR HttpListener::start(): Can't listen at address Address already in use!
2015-07-06 12:37:03.582 ERROR HttpServer::addListener( failed to create new listener
2015-07-06 12:37:03.882 ERROR HttpListener::start(): Can't listen at address Address already in use!
2015-07-06 12:37:03.883 ERROR HttpServer::addListener( failed to create new listener
2015-07-06 12:37:03.883 ERROR [:5] Listener for default is not available!
2015-07-06 12:37:16.601 ERROR [ADMIN] authentication failed!
2015-07-06 12:38:12.156 ERROR [ADMIN] authentication failed!

which simply means your apache2 configuration may have some relative path problem. You may just set server root in apache2 configuration to clear all above absolute path errors.

ServerRoot "/etc/apache2"

Most of the time, LSWS loads your Apache configuration straight away without any error.

Step 4: Test and switch to LiteSpeed

If your application doesn't allow you to run offset port for LSWS, such as WordPress, Magento,etc, you should stop Apache webserver and start LSWS for testing.

If your application allowed, you can set port offset such as 2000 then start LSWS and try websites hosted on offset port 2080 and secured sites on port 2443. This way you may run both Apache ( port 80 or 443) and LiteSpeed ( port 2080 or 2443) at the same time. Most of the time your website is running smoothly and very faster already.

If there is any problem, probably a PHP issue, you need to check LSWS error log, LSWS stderr log or PHP errors log for details. Server error log and stderr log are set to the following location by default unless you customize it.


For PHP error logs, they are normally located in the directory where PHP script runs:

You may go to your server document root and find them:

find . -name php_errors.log

You should check the php_errors.log for the corresponding location where the PHP script running into problems. Try to clear the errors, which may fix the problem. Sometimes even undefined date.timezone in php.ini may cause problems.

If all sites work properly, stop Apache, change “Apache Port Offset” to 0, restart LSWS, all hosted web sites are powered by LiteSpeed now.

Note: Remember to change rc script configuration to remove httpd from the services that get started automatically during a reboot. For example, On CentOS, try this from a root shell:

 chkconfig httpd off

You may also want to add lsws to be started automatically during a reboot:

 chkconfig lsws on

On Debian, try the following:

update-rc.d -f apache2  remove
update-rc.d lsws defaults

Step 5: Monitor

If you have a script that monitors for the web server process, remember to update it to reflect the location of LSWS.

That's it.

litespeed_wiki/installation/standalone-apache-migration.txt · Last modified: 2017/11/28 14:57 by Jackson Zhang