vsanna/dd_systemd

init.d

1. put hello.sh as /usr/lib/hello/hello.sh and $ chmod a+x hello
2. put init.d/hello as /etc/init.d/hello
3. $ runlevel to see current runlevel
4. $ chkconfig --add {servicename}
5. $ sudo chkconfig --level {current runlevel} hello on
   • rc script has chkconfig magic comment and it defines runlevel, so actually this step is not necessary
6. $ chkconfig
7. $ service hello status

servicectl

1. put hello.sh as /usr/lib/hello/hello.sh and $ chmod a+x hello
2. put systemd/hello.service as /etc/systemd/system/hello.service
3. $ systemctl get-default to see current target
4. $ cat /etc/systemd/system/hello.service and see value of WantedBy which is same as what we see in step 3
5. $ systemctl list-unit-files --type=service | grep hello to see the service is recognized by systemctl or not
6. $ systemctl enable hello to enable it (= create symlink)
7. $ systemctl status hello