Set the method and instance of Shell script startup

Updated: Feb 23, 2024 at 10:40:14 Author: Seven-Dimensional Brain

This article mainly introduces the method and example of setting the Shell script to boot itself, the article gives you a very detailed introduction through the code example, which is helpful to your study or work, and the friends who need it can refer to it

catalogue

1. Prepare a Shell script

1.1 Attention

2. Copy the script to the init.d directory

3. Set script permissions

4. Add services

5. Check whether the configuration is successfully added

6. Set the method and instance of Shell script startup

6.1 Principles of Shell script Auto-startup

6.2 Specific implementation methods of different Linux systems

1. Prepare a Shell script

#! /bin/sh #chkconfig: 2345 22 80 #description: Filebeat Service echo "start test ..." ; touch /data/aaa.txt sleep 3 echo "test over ..."

1.1 Attention

#! /bin/sh #chkconfig: 2345 22 80 #description: Filebeat Service

These three lines must be placed three lines before the script. Otherwise, it may appear that service xxx.sh does not support chkconfig or service xxx.sh does not support chkconfig

2. Copy the script to the init.d directory

If scripts are not managed in a unified manner, you can create scripts in the init.d directory.

Note that the script path is changed to its own path. If the script is directly created in the init.d directory, ignore the cp /data/test.sh /etc/init.d/test.sh command

3. Set script permissions

chmod +x /etc/init.d/test.sh

4. Add services

chkconfig --add test.sh

If the command does not work, switch to the /etc/init.d/ directory.

5. Check whether the configuration is successfully added

Replace # test.sh with your own script name chkconfig --list test.sh

2345 If enabled, the startup succeeds.

The following is supplementary science popularization, but do not look

6. Set the method and instance of Shell script startup

In Linux system, self-starting script is one of the important means to manage and configure the system. This chapter describes how to set up Shell scripts to run automatically when the system starts, and will focus on how to do this under different Linux systems.

6.1 Principles of Shell script Auto-startup

The self-launching of Shell scripts can be done by adding scripts to the directory to be executed at system startup or through the system service manager. The principles of the two methods are described below.

6.1.1 Adding a Directory to a Boot Directory

Linux systems automatically execute script files in specific directories at startup. By adding Shell scripts to these directories, you can start on your own.

/etc/rc.d/rc.local directory: In some traditional Linux distributions, scripts can be added to/etc/rc.d/rc.localIn the file. This file is executed last at system startup and can be used to customize startup scripts.

# Add the script path to the rc.local file echo "/path/to/your/script.sh" >> /etc/rc.d/rc.local chmod +x /etc/rc.d/rc.local

6.1.2 Using System Service Manager

Modern Linux systems often use systemd or other service managers to control system services. By creating a systemd service unit, you can easily manage the self-starting of Shell scripts.

Create systemd service unit file:

# /etc/systemd/system/your-service.service
[Unit]
Description=Your Service Description
After=network.target

[Service]
ExecStart=/path/to/your/script.sh
Restart=always
User=your_username

[Install]
WantedBy=multi-user.target

Enable and start the service:

# enable service sudo systemctl enable your-service # enable service sudo systemctl start your-service

6.2 Specific implementation methods of different Linux systems

6.2.1 Ubuntu/Debian

In Ubuntu and Debian systems, Shell scripts can be self-started through the systemd service manager.

# Create the systemd service unit file sudo nano /etc/systemd/system/your-service.service

Add the service unit content mentioned above to the file, save it, and exit. Then enable and start the service.

sudo systemctl enable your-service
sudo systemctl start your-service

6.2.2 CentOS/RHEL

On CentOS and RHEL systems, you can use systemd or add scripts to the /etc/rc.d/rc.local file.

systemd

# Create the systemd service unit file sudo nano /etc/systemd/system/your-service.service

Add the service unit content, save and exit, and then enable and start the service.

sudo systemctl enable your-service
sudo systemctl start your-service

Added to rc.local

# Add the script path to the rc.local file echo "/path/to/your/script.sh" >> /etc/rc.d/rc.local chmod +x /etc/rc.d/rc.local

6.2.3 Arch Linux

Arch Linux also uses systemd as a service manager. Similarly, self-boot can be achieved by creating a systemd service unit file.

# Create the systemd service unit file sudo nano /etc/systemd/system/your-service.service

Add the service unit content, save and exit, and then enable and start the service.

sudo systemctl enable your-service
sudo systemctl start your-service

The above is to set the Shell script boot self-start method and instance details, more about Shell script boot self-start information please pay attention to script home other related articles!

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