killall命令详解

NAME
       killall - kill processes by name 使用名字杀死进程
 
SYNOPSIS
       killall [-Z,--context pattern] [-e,--exact] [-g,--process-group]
       [-i,--interactive] [-q,--quiet] [-r,--regexp] [-s,--signal sig-
       nal] [-u,--user user] [-v,--verbose] [-w,--wait] [-I,--ignore-
       case] [-V,--version] [--] name ...
       killall -l
       killall -V,--version
 
DESCRIPTION
       killall sends a signal to all processes running any of the spec-
       ified commands. If no signal name is specified, SIGTERM is sent.
      
       killall发送一个信号给所有特殊指令的运行程序。如果没有指定信号名字，将发送SIGTERM信号。
       Signals can be specified either by name (e.g. -HUP) or by number
       (e.g. -1) or by option -s.

指定信号可以用名字或者是数字
 
       If  the  command  name is not regular expression (option -r) and
       contains a slash (/), processes executing that  particular  file
       will be selected for killing, independent of their name.

如果命令名字不是规范的表达式或者包含一个/，进程执行特定的文件将被选择并被杀死。不依赖于名字。
 
       killall  returns  a zero return code if at least one process has
       been killed for each listed command, or no commands were  listed
       and  at least one process matched the -u and -Z search criteria.
       killall returns non-zero otherwise.
 如果每个被罗列的命令至少有一个进程被杀死了，killall将返回一个零值，如果没有命令被罗列，至少一个进程混合使用了-u 和-z搜索条件，killall将返回一个非零值。
       A killall process never kills itself (but may kill other killall
       processes).killall永远不能杀死他自己。但是可能杀死其他的killall进程。

killall的意义主要是对进程的名称发送一个signal信号的。