bash script to auto run on boot, make screen, execute a command and detach

I am using Centos 7 and on boot I would like to:

• Make a screen
• Execute a command: osrm-routed –algorithm=MLD ~/osrm-backend/profiles/australia-latest.osrm
• Detatch from screen (possibly not needed, just as long as I can access it myself after its running in future)

Here is something I have thought about, although not correct and wont work

filename: mapstart.sh Contents of file:

#!/bin/bash
/usr/bin/screen -dmS mapapi osrm-routed --algorithm=MLD ~/osrm-backend/profiles/australia-latest.osrm

With your help with the script. I am not sure the best way to run that on boot with centos 7.

Appreciate your help and input.

Answer

For those who would like to know. The issue was with OSRM and centos. I was able to get it running using the full paths of everything and the following in crontab -e

To get the full path of osrm-backend i ran the command of:

which osrm-routed

It returned the result of:

/usr/local/bin/osrm-routed

That then enabled me to add the full path of the command I was trying to run from crontab -e which is required. From there it worked running the below in crontab -e

@reboot /usr/bin/screen -dm -S pistartup /usr/local/bin/osrm-routed --algorithm=MLD ~/osrm-backend/profiles/australia-latest.osrm

break down of all the above:

runs command at reboot only:

@reboot

full path to screen command:

/usr/bin/screen

create screen with name of pistartup and detach:

-dm -S pistartup 

my particular command i wanted to run inside the screen:

/usr/local/bin/osrm-routed --algorithm=MLD ~/osrm-backend/profiles/australia-latest.osrm

Now when ever the machine is rebooted. it has created a screen and run my command. To resume the screen manually If i ever wanted to, i could issue the command of:

screen -r pistartup