Linux设置开机自动执行脚本 rc-local

使用/etc/rc.local

1、启动rc-local服务

首先授予执行权限

chmod +x /etc/rc.d/rc.local

设置开启自启并启动

sudo systemctl enable rc-local
sudo systemctl start rc-local

查看状态

sudo systemctl status rc-local

2、编写要执行的脚本

vim /home/start.sh

#!/bin/bashecho "--------开始--------"
sleep 20
echo "===================="# 定义目标主机和端口
HOST1="199.10.100.81"
PORT1="8848"HOST2="199.10.100.81"
PORT2="3306"export JAVA_HOME=/usr/local/jdk-17.0.11
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH# 尝试通过Telnet连接第一个目标，直到连接成功
echo "Trying to connect to $HOST1:$PORT1..."
while true; doif timeout 5 telnet $HOST1 $PORT1 < /dev/null | grep -q "Connected to"; thenecho "Telnet connection to $HOST1:$PORT1 successful."breakelseecho "Telnet connection to $HOST1:$PORT1 failed, retrying in 5 seconds..."sleep 5fi
done# 尝试通过Telnet连接第二个目标，直到连接成功
echo "Trying to connect to $HOST2:$PORT2..."
while true; doif timeout 5 telnet $HOST2 $PORT2 < /dev/null | grep -q "Connected to"; thenecho "Telnet connection to $HOST2:$PORT2 successful."breakelseecho "Telnet connection to $HOST2:$PORT2 failed, retrying in 5 seconds..."sleep 6fi
done# 执行启动服务命令
nohup java -jar test.jar > /nohup.out &
# 检查命令执行是否成功
if [ $? -eq 0 ]; thenecho "服务启动成功"
elseecho "服务启动失败"
fi

编辑启动文件

编辑启动文件

vim /etc/rc.local

重启linux服务器会自动执行脚本