UNIX
- is a simple operating system, but it takes a genius to understand the simplicity
- originally Uniplexed Information and Computing Service (UNICS)
- was developed in AT&T’s Bell Labs back in the mid-to-late 1960’s
- had a single file system that programs use to communicate with each other. This is why “everything is a file” on Linux – including hardware devices and special files that provide system information or other data. It’s also why only Windows has drive letters, which it inherited from DOS — on other operating systems, every file on the system is part of a single directory hierarchy.
Versions
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General
- Executable and Linkable Format (ELF)
- Ricing
- Service／Daemon Manager - (SystemV - Upstart - Systemd - Launchd)
- UNIX - Boot Process
- UNIX - File Stuff
- UNIX - Package Managers (All)
- UNIX - Portable Operating System Interface (POSIX)
- UNIX - Process
- UNIX - Terminal & Shell
- Unix Pluggable Authentication Modules (PAM)