How to run script in Start UP Linux

setting script in Linux start UP
Please do the Following step:

1. Write a script file(Eg: new_script).
2. make it executable (Eg:chmod +x new_script ).
3. Copy the script in to /etc/init.d/
4. ln -s /etc/init.d/new_script /etc/rc5.d/S50new_script
5. ln -s /etc/init.d/new_script /etc/rc5.d/K50new_script
6. Restart the machine.

After the restart your script will work in start up.