> man -S 2 kill NAME kill - send signal to a process SYNOPSIS #include <sys/types.h> #include <signal.h> int kill(pid_t pid, int sig); ... DESCRIPTION The kill() system call can be used to send any signal to any process group or process. ... If sig is 0, then no signal is sent, but error checking is still per- formed; this can be used to check for the existence of a process ID or ^^^^^ ^^^^^^^^^^ process group ID. ... SEE ALSO _exit(2), killpg(2), signal(2), sigqueue(2), tkill(2), exit(3), capa- bilities(7), credentials(7), signal(7) ... Linux 2008-08-29 KILL(2)