A simple shell script for Linux startup jar package

background:

The device side of the project needs to run the jar package program to connect the socket with the server and send data. Every time the process is started, the command to start the jar package needs to be entered in the Linux terminal, which is rather cumbersome, and then try to write the command to start the jar package. In the shell script file, the function of operating the shell script to start the jar package program is realized.

The commands in the socdev.sh script file written are as follows:

1  #The directory where the startup command is located
 2 HOME= '/home/pi/Desktop/java'
 3  
4  #Get the mac address (unique)
 5 mac=`ifconfig | grep eth0 | awk '{print $5 }'`
 6  
7  start( ){
 8 #Enter      the directory where the command is located
 9      cd $HOME
 10      nohup sudo java -jar ufoCatcher-catcher-1.0-SNAPSHOT.jar $mac wss://ip:port /catcher PULL_DOWN &
 11  }
 12  
13  stop(){
 14      # kill all java programs
 15      ps -ef | grep java | grep -v grep |awk '{print $2}' | xargs sudo kill -9
 16  }
 17  
18 case $1 in
19    start)
20       start
21    ;;
22    stop)
23       stop
24    ;;
25    restart)
26       $0 stop
27       sleep 2
28       $0 start
29     ;;
30    *)
31       echo "Usage: {start|stop|restart}"
32    ;;
33 esac
34 
35 exit 0

Start the jar package program: ./socdev.sh start

Terminate the jar package program: ./socdev.sh stop