bash 如果存在，则杀死进程
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Kill a process if it exists
提问by SirRupertIII
I want to kill all instruments processes that are running. I am using this:
我想杀死所有正在运行的仪器进程。我正在使用这个：
sudo killall instruments
sudo killall instruments
I am using this in a script and sometimes the process is not running and it stops my script saying there are no processes with that name that are running.
我在脚本中使用它，有时进程没有运行，它会停止我的脚本，说没有正在运行的具有该名称的进程。
How can I check if a particular process is running? Instruments in my case.
如何检查特定进程是否正在运行？仪器在我的情况下。
采纳答案by KamikazeCZ
sudo killall instruments 2>/dev/null
isn't enough?
不够？
回答by that other guy
If your script is terminating, you have most likely enabled set -e, to exit when a command fails.
如果您的脚本正在终止，您很可能已启用set -e, 以在命令失败时退出。
If you don't care about the status, you can just append || trueto the command:
如果你不关心状态，你可以附加|| true到命令：
sudo killall instruments || true
回答by giordano
You can use pgrep <proc>to search for a process named <proc>
您可以使用pgrep <proc>搜索名为的进程<proc>
if pgrep instruments &> /dev/null ; then sudo killall instruments ; fi
