UNIX, first developed in 1969 by AT&T, and Linux (an open-source operating system, first released in 1991 by Linus Torvalds, are very similar in architecture, command set, shells and shell scripting languages. Whether you are looking to acquire the skills for system administration, application support, or development, or perhaps gain a Linux certification, you will find a UNIX training course or a Linux training course to suit your needs here.