There are many ways to set custom programs to start automatically on boot in Linux systems. The method described in this article is to set the program as a service for automatic startup.Create a new hello.service file in the /lib/systemd/system directory.
touch /lib/systemd/system/hello.service
vim /lib/systemd/system/hello.service
[Unit]
Description=Hello Service
[Service]
Type=simple
ExecStart=/usr/bin/hello.sh
SuccessExitStatus=2
[Install]
WantedBy=multi-user.target
Note that when the system service process is completed in the program specified in ExecStart, the Type=simple configuration should be used.
If the program in ExecStart has child processes running in the background, the Type=forking configuration should be used, allowing the child processes to continue running in the background when the parent process exits.Create a startup script file hello.sh and grant executable permissions.
touch /usr/bin/hello.sh
vi /usr/bin/hello.sh
#!/bin/bash
echo "Hello World!" > /home/root/hello
chmod +x /usr/bin/hello.sh
systemctl daemon-reload
systemctl enable hello.service
Note that in addition to using the systemctl command to set the service, you can also use the soft link ln command to set it up.
cd /etc/systemd/system/multi-user.target.wants
ln -s /lib/systemd/system/hello.service hello.service
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