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This article will explain in detail how to monitor the process under linux and the shell script that restarts automatically after crashing. The editor finds it very practical, so I share it with you as a reference. I hope you can get something after reading this article.

How to ensure that the service is running all the time? How to ensure that the service can be automatically restarted even if the service is down? This kind of problem is often encountered when writing service programs. In the Linux system, the powerful shell can handle such transactions flexibly.

The following shell passes through a while-do loop, using ps-ef | grep to check whether the loader process is running, and if not, start it, thus ensuring that the crashed and hung process is restarted in a timely manner.

Two points must be noted:

1. Ps | grep a process must add its drive, otherwise it is easy to grep to the wrong result

2. The grep command itself must be removed from the result with-v, otherwise the result is not empty.

The code is as follows:

#! / bin/sh

# =

# YuanHui.HE

# khler@163.com

# =

While:

Do

Echo "Current DIR is" $PWD

StillRunning=$ (ps-ef | grep "$PWD/loader" | grep-v "grep")

If ["$stillRunning"]; then

Echo "TWS service was already started by another way"

Echo "Kill it and then startup by this shell, other wise this shell will loop out this message annoyingly"

Kill-9$ pidof $PWD/loader

Else

Echo "TWS service was not started"

Echo "Starting service..."

$PWD/loader

Echo "TWS service was exited!"

Fi

Sleep 10

Done

If you start this shell and find that the process already exists, indicating that the process has been started in a different way than the shell, it will keep reminding you to find the process, and the solution is to either start the service with this shell only, or the kill will drop as soon as it is found that the service started in another way, as the above statement does:

Kill-9$ pidof $PWD/loader

This is the end of the article on "how to monitor the process under linux and the shell script that restarts automatically after crashing". I hope the above content can be helpful to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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