He then copylefted Linux. This version of Linux is being packaged with third-party applications, documentation, and technical support by several vendors. Other individuals have undertaken to package the Linux kernel as well, with each offering something a little different to help users get started. All of these distributions share the Linux kernel, including the core OS functions and network stack. All provide the standard UNIX system library tools, some applications, and limited technical support.
Documentation is also varied.
The main difference is the system configuration, support, documentation, and third-party applications. Installation and setup can be a trying event as there is very limited graphical tool setup support and most require command-line setup interfaces that require some expertise to complete. Technical support and decimation is limited in all of the packages. It is claimed that there are over seven million Linux users as of this time. Even with all the potential pitfalls listed above, there is great appeal for an OS like Linux.