Functionality between versions of CustomBuild varies, so if you need to know which version of CustomBuild you’re running, current scripts (1.1, 1.2 and 2.0) can use:

Issues relating to compiling apache, php etc..Which version of CustomBuild will am I running?

cd /usr/local/directadmin/custombuild
./build version

eg:

[root@server custombuild]# ./build version
2.0.0-RC7 (rev: 798)

The value is also specifying in the options.conf, however you cannot just change custombuild=1.2 to be custombuild=2.0 because version 2.0 has many different settings which are not the same.
See the forum thread, if you want to upgrade to 2.0.

Older scripts might not have “./build version” functionality, so use this instead:

cd /usr/local/directadmin/custombuild
grep BUILDSCRIPT_VER build

How to install OpenLiteSpeed

OpenLiteSpeed is the Open Source edition of LiteSpeed Web Server Enterprise. OpenLiteSpeed containing all of the essential features that found in LiteSpeed Enterprise, including LSCache (plugin needed for WordPress).

To install OpenLiteSpeed (DA 1.57 or higher is needed, it will run fine with pre-release binaries too):

1) You must have CustomBuild 2.0. If you do not, upgrade to CustomBuild 2.0
If there you unsure of which version of CustomBuild you’re using,

2) You can either run this in step 2 of the CB2 install guide, or do it after. Run the following to set the options.conf to use OpenLiteSpeed and lsphp:

If you have more than 1 php version, set php2_mode lsphp for all other php#_modes.