There have been many questions here at Experts Exchange along the lines of, "How can I tell the type of file from its contents?", as well as, "What kind of file has the XXX extension?" Sometimes the situation is that a file does not even have an extension. This article addresses those issues.
Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.