Centos设置开机自动启动

利用systemd服务实现开机自动启动

创建配置文件

vim /etc/systemd/system/hello.service
#### 文件内容
[Unit]
Description=Hello

[Service]
ExecStart=/usr/bin/python /root/hello.py
Restart=on-failure

[Install]
WantedBy=multi-user.target

创建 python 脚本文件

vim /root/hello.py
#### 脚本内容
import logging
import time
logging.basicConfig(format='Date-Time : %(asctime)s : Line No. : %(lineno)d - %(message)s', level = logging.DEBUG)
while True:
	logging.debug("A Debug logging Message")
	time.sleep(10)

启动服务，并设置开机自启

systemctl daemon-reload # 编写后需要重新加载新的配置文件
systemctl start hello.service #启动服务
systemctl enable hello.service #设置开机自动启动
systemctl status hello.service #查看状态

[root@www ~]# systemctl status hello.service -l
● hello.service - Hello
   Loaded: loaded (/etc/systemd/system/hello.service; enabled; vendor preset: disabled)
   Active: active (running) since Sun 2024-04-14 11:27:37 CST; 2min 17s ago
 Main PID: 8128 (python)
   CGroup: /system.slice/hello.service
           └─8128 /usr/bin/python /root/hello.py

Apr 14 11:28:17 www.a.org python[8128]: Date-Time : 2024-04-14 11:28:17,540 : Line No. : 5 - A Debug logging Message
Apr 14 11:28:27 www.a.org python[8128]: Date-Time : 2024-04-14 11:28:27,549 : Line No. : 5 - A Debug logging Message
Apr 14 11:28:37 www.a.org python[8128]: Date-Time : 2024-04-14 11:28:37,580 : Line No. : 5 - A Debug logging Message
Apr 14 11:28:47 www.a.org python[8128]: Date-Time : 2024-04-14 11:28:47,612 : Line No. : 5 - A Debug logging Message
Apr 14 11:28:57 www.a.org python[8128]: Date-Time : 2024-04-14 11:28:57,619 : Line No. : 5 - A Debug logging Message
Apr 14 11:29:07 www.a.org python[8128]: Date-Time : 2024-04-14 11:29:07,638 : Line No. : 5 - A Debug logging Message
Apr 14 11:29:17 www.a.org python[8128]: Date-Time : 2024-04-14 11:29:17,642 : Line No. : 5 - A Debug logging Message
Apr 14 11:29:27 www.a.org python[8128]: Date-Time : 2024-04-14 11:29:27,701 : Line No. : 5 - A Debug logging Message
Apr 14 11:29:37 www.a.org python[8128]: Date-Time : 2024-04-14 11:29:37,728 : Line No. : 5 - A Debug logging Message
Apr 14 11:29:47 www.a.org python[8128]: Date-Time : 2024-04-14 11:29:47,737 : Line No. : 5 - A Debug logging Message

systemctl restart hello #重启服务
ps aux | grep hello #查看进程
[root@www ~]# ps aux | grep hello
root      8347  0.0  0.2 138728  5404 ?        Ss   11:31   0:00 /usr/bin/python /root/hello.py
root      8373  0.0  0.0 112812   976 pts/0    S+   11:31   0:00 grep --color=auto hello

systemctl stop hello #停止服务

利用rc.local文件实现开机自启

添加启动命令

vim /etc/rc.d/rc.local
#添加
/bin/echo ddd > /root/ddd.txt

为rc.local添加执行权限
chmod +x /etc/rc.d/rc.local
重启计算机，相应的程序就会执行了。