false - phpMan

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.