如何检查 JBoss 是否在 Unix 服务器上运行? [英] How to check if JBoss is running on Unix server?

问题描述

我下面有一个脚本，我想根据它是否可以在进程列表中找到 jboss 进程来回显jboss not running"或jboss is running".但是，当我关闭 Jboss 时，它仍会执行 Else 条件并显示jboss 正在运行".如果我手动执行pgrep -f jboss"，它不会返回任何内容，那么为什么它仍会进入 Else 状态?困惑

I have a script below that I'd like to echo out "jboss not running" or "jboss is running" depending on whether it can find the jboss process in the process list. However, when I shut down Jboss it still executes the Else condition and says "jboss is running". If I manually do "pgrep -f jboss" it doesn't return anything, so why is it still going into the Else condition? puzzled

#!/bin/bash
if [ -z "$(pgrep -f jboss)" ]
  then
  echo "jboss is not running"
else
  echo "jboss is running"
fi 

感谢您的帮助！

推荐答案

不要检查输出，只需使用命令:

Instead of checking the output, just use the command:

if pgrep -f jboss >/dev/null
  then
  echo "jboss is running"
else
  echo "jboss is not running"
fi 

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