shell
termops cultureprogramming
The program that reads commands and runs them, and the interface through which most infrastructure work is still done.
Its durability is a design consequence rather than nostalgia. Because Unix tools read text and write text, the shell can compose programs that were never written with each other in mind, and a pipeline assembled in one line does work that would otherwise need a project. That same property is a security surface: a shell interprets what it is given, so anything that builds a command from untrusted input is one quoting mistake away from executing it. Command injection is the shell doing exactly its job on the wrong text.
Also known as: bash, command line