pidof 的用法

PIDOF(8)              Linux System Administrator’s Manual             PIDOF(8)

NAME
       pidof -- find the process ID of a running program.

SYNOPSIS
       pidof [-s] [-c] [-x] [-o omitpid] [-o omitpid..]  program [program..]

DESCRIPTION
       Pidof  finds  the process id’s (pids) of the named programs. It prints those id’s on the standard out-
       put. This program is on some systems used in run-level change scripts, especially when the system  has
       a  System-V  like  rc  structure. In that case these scripts are located in /etc/rc?.d, where ? is the
       runlevel. If the system has a start-stop-daemon (8) program that should be used instead.

OPTIONS
       -s     Single shot - this instructs the program to only return one pid.

       只返回一个PID

       -c     Only return process ids that are running with the same root directory.  This  option  does  not
              make  sense  for  non-root users, as they will be unable to check the current root directory of
              processes they do not own.

       -x     Scripts too - this causes the program to also return process id’s of shells running  the  named
              scripts.

        得到运行脚本的PID

       -o     Tells  pidof  to omit processes with that process id. The special pid %PPID can be used to name
              the parent process of the pidof program, in other words the calling shell or shell script.