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Does `kill -p` really work?

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linux-howto

http://unix.stackexchange.com – In the man page of kill it is written as following SYNOPSIS kill [ -s signal | -p ] [ -a ] [ -- ] pid ... kill -l [ signal ] -p Specify that kill should only print the process id (pid) of the named processes, and not send any signals. But as I tried many times in both RH and RHEL, command like kill -s SIGHUP |-p 123 never worked and an error is always reported bash: -p: command not found Did I make any mistakes? (HowTos)