The standard output of command is connected via a pipe to the standard
input of command2. This connection is performed before any redirec‐
tions specified by the command (see REDIRECTION below). If |& is used,
the standard error of command is connected to command2's standard input
through the pipe; it is shorthand for 2>&1 |. This implicit redirect‐
ion of the standard error is performed after any redirections specified
by the command.
help :
:: :
Null command.
No effect; the command does nothing.
Exit Status:
Always succeeds.
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