Much of Linux's higher-level functionality is accoutered by disassociated projects which interface with the kernel. The GNU userland is an important allotment of most Linux systems, providing the skin and Unix tools which carry out many indispensable operating system tasks. On lead these tools appearance a Linux red tape with a graphical user interface that can Linux Support be used, usually running in the X Window System.

• Although there is a lack of Linux ports for some Mac OS X and Microsoft Windows programs in domains such as desktop publishing and professional audio, applications roughly equivalent to those prepared for Mac and Windows are feasible for Linux.