# Building eXtremeDB Integrity OS Libraries on Linux

> ## INTERGITY OS (Multi IDE, Linux host)

> Your root installation directory contains the ready-to use `default.gpj` file for MULTI. Make sure that your MULTI environment is configured and load the file into the IDE. The `default.gpj` includes all projects (samples, and the runtime) that are available to you according to your eXtremeDB license. For example, source code licensees can rebuild the database runtime, while object code licensees can’t. It is possible to change the build targets via the “Edit/Set build target” menu item. You can also change the default location for your MULTI / INTEGRITY installation.

> The command-line build is also available. For example:

>         # cd eXtremeDB
>         # /usr/ghs/multi/linux86/gbuild