如何在 bash 中列出所有后台 pid
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How to list all background pids in bash
提问by code_fodder
Either I am not able to phrase my search correctly or the answer is not easy to find!, but I am trying to figure out how to list all of my background task PIDs. For example:
要么我无法正确表达我的搜索，要么不容易找到答案！，但我正在尝试弄清楚如何列出我所有的后台任务 PID。例如：
So far I have found that to list the last PID we use:
到目前为止，我发现要列出我们使用的最后一个 PID：
$!
But now I want to list the PID of the task before that (if one exists), but I can't find how to do that. Utlimatly I want to list all my background task PIDs.
但是现在我想在此之前列出任务的PID（如果存在），但我找不到如何做到这一点。最终我想列出我所有的后台任务 PID。
I know we can also find last job ID with:
我知道我们还可以通过以下方式找到最后一个工作 ID：
%% (last job in list)
%1 (first job in list)
%2 (second job in list)
But the same does not seem to work for process id?
但是对于进程 id 似乎也不起作用？
Thanks all :)
谢谢大家:)
回答by Michael Kazarian
Use ps S. For example:
使用ps S. 例如：
$ vim &
[1] 8263
$ ipython &
[2] 8264
$ ps S
PID TTY STAT TIME COMMAND
3082 pts/0 Ss 0:00 bash
3137 pts/0 Sl+ 0:00 python /usr/bin/ipython
8207 pts/2 Ss 0:00 bash
8263 pts/2 T 0:00 vim
8264 pts/2 Tl 0:00 python /usr/bin/ipython
8284 pts/2 Tl 0:00 python /usr/bin/ipython
8355 pts/2 R+ 0:00 ps S
If you want get PIDs use below:
如果您想获取 PID，请使用以下方法：
$ ps S | awk '{print $ 1 }' | grep -E '[0-9]'
3082
3137
8207
8263
8264
8284
8357
8358
835
Also you can use jobs -lBut it show background processes only for current session.
您也可以使用jobs -l但它仅显示当前会话的后台进程。
回答by cnicutar
But the same does not seem to work for process id?
但是对于进程 id 似乎也不起作用？
You can try jobs -lor -p. The -land -pswitches cause the jobscommand to also output process IDs.
你可以试试jobs -l或-p。的-l和-p原因的切换jobs命令也输出进程ID。
回答by ghoti
In bash, as in tcsh, the command you probably want is jobs -l(for Long).
在 bash 中，就像在 tcsh 中一样，您可能想要的命令是jobs -l（对于 Long）。
[ghoti@pc ~]$ sleep 300 &
[1] 33811
[ghoti@pc ~]$ sleep 301 &
[2] 33812
[ghoti@pc ~]$ sleep 302 &
[3] 33813
[ghoti@pc ~]$ jobs -l
[1]- 33811 Running sleep 300 &
[2]- 33812 Running sleep 301 &
[3]+ 33813 Running sleep 302 &
[ghoti@pc ~]$
回答by Alfe
If you also want to see your child processes which aren't handled as a job by the shell anymore (e. g. because you disowned them deliberately or similar), then you can use this to find all processes which have youas their parent:
如果您还想查看不再被 shell 处理为作业的子进程（例如，因为您disown故意或类似地编辑它们），那么您可以使用它来查找所有将您作为其父进程的进程：
grep "PPid:.*$$" /proc/[0-9]*/status | cut -d/ -f3
Also
还
ps --ppid $$
can be of use. (Credits to @Michael Kazarian who also has an answer here.)
可以用。（感谢@Michael Kazarian，他在这里也有答案。）
