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Do nothing, returning a zero (true) exit status

   `true' does nothing except return an exit status of 0, meaning
"success".  It can be used as a place holder in shell scripts where a
successful command is needed, although the shell built-in command `:'
(colon) does the same thing faster.

   `true' ignores _all_ command line arguments, even `--help' and
`--version', since to do otherwise would change expected behavior that
some programmers may be relying on.

   This version of `true' 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.

"You are never dedicated to something you have complete confidence in. No-one is fanatically shouting that the sun is going to rise tomorrow. When people are fanatically devoted to political or religious faiths or any other kind of dogmas or goals, its always because these dogmas or goals are in doubt" - Robert T Pirsig

Related commands:

false - Do nothing, unsuccessfully
yes - Print a string until interrupted