Run commands at startup

Question

My problem is as follows: I want to to modify my Ubuntu LiveCD to run several commands at startup, but I'm new to Ubuntu development and don't know how to do this. What is the proper way to run these commands every time I boot Ubuntu?

Here are ex. commands:

sudo rm /home/ubuntu/Desktop/examples.desktop
sudo perl -e 'print("[DesktopEntry]\nVersion=1.0\nType=Application\nTerminal=false\nIcon=xinput_calibrator\nName=Calibraion\nExec=env /usr/bin/xinput_calibrator\n");' > /home/ubuntu/Desktop/Calibrate.desktop
sudo /home/ubuntu/Desktop/Calibrate.desktop

EDIT!!!

I've actually tried modifying rc.local file and it looks like this now:

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

sudo rm /home/ubuntu/Desktop/examples.desktop
sudo perl -e 'print("[DesktopEntry]\nVersion=1.0\nType=Application\nTerminal=false\nIcon=xinput_calibrator\nName=Calibraion\nExec=env /usr/bin/xinput_calibrator\n");' > /home/ubuntu/Desktop/Calibrate.desktop
sudo /home/ubuntu/Desktop/Calibrate.desktop

exit 0

But still I don't know if it is going to work. I want to be sure before I'll build iso.

EDIT 2!!!

I've build iso file using this tutorial: https://help.ubuntu.com/community/LiveCDCustomization I've done steps:

1. Extract the CD .iso contents
2. Extract the Desktop system
3. then I've edited the rc.local file and saved
4. Assembling the file system ( I've ommited "Regenerate manifest" point)

and now I get error

No init found. Try passing init= bootarg

while booting my LiveCD.

passing init= bootarg results in:

/bin/sh: bootarg: not found

What am I doing wrong?

Thanks

Solution

To execute a script at startup of Ubuntu

Edit /etc/rc.local and add your commands
The script must always end with exit 0 

To execute a script upon rebooting Ubuntu

Put your script in /etc/rc0.d
Make it executable (sudo chmod +x myscript)
Note: The scripts in this directory are executed in alphabetical order 

The name of your script must begin with K99 to run at the right time.

I'm not sure if this will help you in your situation but I will look some more and see what I can come up with.

To execute a script at shutdown

Put your script in /etc/rc6.d
Make it executable (sudo chmod +x myscript)
Note: The scripts in this directory are executed in alphabetical order 

The name of your script must begin with K99 to run at the right time.

This question has been asked before here is the link. How to run commands at login on ubuntu 12.04?

Comments

[Web-E]

you don't need sudo in rc.local. remove them other wise it won't work

[Sayid]

I've edited the question again

[Admin]

Would it be easier to create a live usb with persistence, so you can store your settings, and then boot off of that?

[Sayid]

I'm sorry but it is not possible. The build must be read only.

[Sayid]

I've edited the question

[Doug]

Bingothat is the right way to do it. Build your ISO and it should function. Let me know how it turns out.

[Sayid]

EDITED QUESTION AGAIN