Install LiteSpeed on cPanel

Step 1: Install LiteSpeed WHM plugin Run the following commands from ssh as root
cd /usr/src
wget http://www.litespeedtech.com/packages/cpanel/lsws_whm_plugin_install.sh
sh ./lsws_whm_plugin_install.sh
rm -f lsws_whm_plugin_install.sh
Note: To uninstall WHM LiteSpeed plugin,
run command at /usr/local/cpanel/whostmgr/docroot/cgi/lsws/lsws_whm_plugin_uninstall.sh


Step 2: Install LiteSpeed Speed Web Server from within WHM
1. click “LiteSpeed Web Server Plugin for WHM” in “Plugins” section of WHM.
2. click “Install LiteSpeed Web Server”
3. Fill in the form to specify
Trial license key or serial number (http://www.litespeedtech.com/trial/license)
LiteSpeed target installation directory
Port Offset, set it to 0 ( set to 0 to replace Apache otherwise set a number like “2000” to try LiteSpeed on port 2080 )

enable PHP SuEXEC

Assign user name and password for LWSW web admin console
Your email address as the Administrators email.
4. Click “Next” to install LiteSpeed If you set Port Offset to “0”, it may stop Apache and start LiteSpeed after a successful installation,
you may want to switch back to Apache temporarily as we still need to build PHP binary for LiteSpeed.


Step 3: Enable Easy Apache integration.
Then
Build matching PHP binary There is a pre-built PHP 4 binary coming with LSWS, however, you should build your own PHP binary using matching configuration options used by Apache mod_php. If LiteSpeed is running, you should switch back to Apache temporarily by clicking “switch to Apache” link. Then, click “Build Matching PHP binary” link. It is going take a while.
Increase "Max cPanel process memory" in cPanel tweak setting if you are seeing blank page when clicking Build matching PHP binary

Step 4: Start LiteSpeed again Just click “Restart LiteSpeed” Then you can verify if everything works as expected. It should! If “Port Offset” is set to non-zero, you can now replace Apache with LiteSpeed Web Server. Just click “Switch to LiteSpeed”. That’s it.

TO TRANSFER LICENSE FROM ONE SERVER TO ANOTHER
Refer : http://www.litespeedtech.com/support/wiki/doku.php?id=litespeed_wiki:license:transfer_release_license#how_to_transfer_existing_license
http://www.litespeedtech.com/support/wiki/doku.php?id=litespeed_wiki:apache:cpanel