File: coreutils.info, Node: false invocation, Next: true invocation, Up: Conditions 16.1 `false': Do nothing, unsuccessfully ======================================== `false' does nothing except return an exit status of 1, meaning "failure". It can be used as a place holder in shell scripts where an unsuccessful command is needed. In most modern shells, `false' is a built-in command, so when you use `false' in a script, you're probably using the built-in command, not the one documented here. `false' honors the `--help' and `--version' options. This version of `false' is implemented as a C program, and is thus more secure and faster than a shell script implementation, and may safely be used as a dummy shell for the purpose of disabling accounts. Note that `false' (unlike all other programs documented herein) exits unsuccessfully, even when invoked with `--help' or `--version'. Portable programs should not assume that the exit status of `false' is 1, as it is greater than 1 on some non-GNU hosts.