# Linux* OS

On Linux* operating systems, the default installation location is `/opt/intel/composer_xe_2013/tbb`. The following table describes the subdirectories.

Intel® Threading Building Blocks Subdirectories on Linux* OS
Item | Location | Environment Variable
--- | --- | ---
Include files | `include/tbb/*.h` | `CPATH`
Shared libraries |
    lib/<arch>/lib<lib><variant>.so
where
<arch> | Processor
--- | ---
`ia32` | Intel® IA-32 processors
`intel64` | Intel® 64 architecture processors
`ia64` | Intel® IA-64 architecture (Itanium®) processors
`<*version>` strings | Linux configuration
--- | ---
`<gccversion>` | gcc* version number
`<glibcversion>` | `glibc.so` version number
`<kernelversion>` | Linux kernel version number
`<lib>` | Version
--- | ---
`tbb` | General library
`tbbmalloc` | Memory allocator
`tbbmalloc_proxy` | Substitution for default memory allocator
`tbb_preview` | Community preview features library
`<variant>` | Version
--- | ---
(none) | Release version
`_debug` | Debug version
| `LIBRARY_PATH` `LD_LIBRARY_PATH`
Examples | `examples/<class>/*/.` |
GNU Makefile for example | `examples/<class>/*/Makefile` where class describes the class being demonstrated. |

Parent topic: Package Contents