Run a shell command automatically and directly after restarting and keep it running

Question

I have this shell command asebamedulla "ser:device=/dev/ttyACM0", I want it to be run directly after restarting Linux. I read some solutions ( shell_command & , or run in in background as a daemon process...) but I didn't know how to use them. My question is :
how to run a shell command automatically and directly after startup?

Answer 1

Solution 1:

>>sudo crontab -e

#In the first line of this file enter this:

@reboot <your command whatever>

#Save and Exit

Solution 2:

Make a script name it "whatever.sh".

Put the file in your /etc/init.d/ directory.

Change the permission of your file by.

chmod +x /etc/init.d/whatever.sh