all-in-one/ubuntu/systemctl.md

Quick Guide for auto start service

• Reference

• Reference 2

• DZone

• create service script in /etc/systemd/system/myserver.service

  [Unit]
  Description=ROT13 demo service
  After=network.target
  StartLimitIntervalSec=0
  [Service]
  Type=simple
  Restart=always
  RestartSec=1
  User=centos
  ExecStart=/usr/bin/env php /path/to/server.php
  
  [Install]
  WantedBy=multi-user.target
  

• sample java application

  [Unit]
  Description=My Webapp Java REST Service
  [Service]
  User=ubuntu
  # The configuration file application.properties should be here:
  
  #change this to your workspace
  WorkingDirectory=/home/ubuntu/workspace
  
  #path to executable. 
  #executable is a bash script which calls jar file
  ExecStart=/home/ubuntu/workspace/my-webapp
  
  SuccessExitStatus=143
  TimeoutStopSec=10
  Restart=on-failure
  RestartSec=5
  
  [Install]
  WantedBy=multi-user.target
  

• script /home/ubuntu/workspace/my-webapp. Change to executable sudo chmod u+x my-webapp

  #!/bin/sh
  sudo /usr/bin/java -jar my-webapp-1.0-SNAPSHOT.jar server config.yml
  

• start service

  
  $ sudo systemctl start myserver.service
  
  // or 
  $ sudo systemctl start myserver
  

• to restart

  $ sudo systemctl restart myserver.service
  

• automatically start on boot

$ sudo systemctl enable myserver.service

• check active

  $ systemctl is-active myserver.service
  

• All services status

  $ service  --status-all