命令KILL可以发送所有信号吗？

Question

我想知道是否可以使用 Kill 命令在进程上发送所有信号。

我看过Kill和Signal的手册（第7节），但我不知道Linux中的信号是否都可以与Kill一起使用。

谢谢

Answer 1

是的，你可以。有很多方法。最简单的方法是：

kill -signalnumber  pid1 pid2 ...

Answer 2

是的，可以。

你可以这样使用它：

kill [options] <pid> [...]

示例：

kill -USR1 6127

这将发送 USR1 信号以处理 pid 6127

否则信号编号：

kill -9 6127

所有这些都在 kill 手册上有详细说明，你可以在终端上输入 man kill 看到它，输出将是这样的：

NAME kill - send a signal to a process

SYNOPSIS kill [options] [...]

DESCRIPTION The default signal for kill is TERM. Use -l or -L to list available signals. Particularly useful signals include HUP, INT, KILL, STOP, CONT, and 0. Alternate signals may be specified in three ways: -9, -SIGKILL or -KILL. Negative PID values may be used to choose whole process groups; see the PGID column in ps command output. A PID of -1 is special; it indicates all processes except the kill process itself and init.

您可以键入 kill -l 查看信号的简短列表，或者您可以使用 man 7 signal 查看信号 (7) 手册以查看完整的信号列表和描述：

Standard signals Linux supports the standard signals listed below. Several signal numbers are architecture-dependent, as indicated in the "Value" column. (Where three values are given, the first one is usually valid for alpha and sparc, the middle one for x86, arm, and most other architectures, and the last one for mips. (Values for parisc are not shown; see the Linux kernel source for signal numbering on that architecture.) A - denotes that a signal is absent on the corresponding architecture.)

   First the signals described in the original POSIX.1-1990 standard.

   Signal     Value     Action   Comment
   ──────────────────────────────────────────────────────────────────────
   SIGHUP        1       Term    Hangup detected on controlling terminal
                                 or death of controlling process
   SIGINT        2       Term    Interrupt from keyboard
   SIGQUIT       3       Core    Quit from keyboard
   SIGILL        4       Core    Illegal Instruction
   SIGABRT       6       Core    Abort signal from abort(3)
   SIGFPE        8       Core    Floating point exception
   SIGKILL       9       Term    Kill signal
   SIGSEGV      11       Core    Invalid memory reference
   SIGPIPE      13       Term    Broken pipe: write to pipe with no
                                 readers
   SIGALRM      14       Term    Timer signal from alarm(2)
   SIGTERM      15       Term    Termination signal
   SIGUSR1   30,10,16    Term    User-defined signal 1
   SIGUSR2   31,12,17    Term    User-defined signal 2
   SIGCHLD   20,17,18    Ign     Child stopped or terminated
   SIGCONT   19,18,25    Cont    Continue if stopped
   SIGSTOP   17,19,23    Stop    Stop process
   SIGTSTP   18,20,24    Stop    Stop typed at terminal
   SIGTTIN   21,21,26    Stop    Terminal input for background process
   SIGTTOU   22,22,27    Stop    Terminal output for background process

   The signals SIGKILL and SIGSTOP cannot be caught, blocked, or ignored.

还有很多关于信号的更多信息。 ;)

Answer 3

我们可以通过with

发送信号进行处理

kill -signal pid1 [pid2 ... pidn]

杀戮-9 1379 3001

或者您可以按名称向一组进程发送信号

killall -s 信号进程名

killall -s SIGTERM firefox

但是，进程如何使用信号取决于此信号是否在同一用户中 space 以及信号是否可以被进程捕获。

我们有很多可能的信号，手动捕获或忽略等，必须有人参与。

但其他人，取决于您如何编程以响应信号。

命令KILL可以发送所有信号吗？

Command KILL can send all signals?

linux

bash

shell

command-line

command