How do I delete this read only file?

Question

In order to enable USB mass storage mode, I placed a file in the /system/etc/init.d/ directory. My situation has changed, and now I want to remove that file. I know it is safe to remove because I put it there.

However, I can not delete it. I have a rooted phone, and I have tried using ES File Explorer and also su mode in a command line emulator, but every time I try to delete it, I get an error that says rm can't remove 'MassStorage': Read-only file system.

How do I delete this file?

Answer 1

As su, do this :

# mount -o remount,rw /system

You will now be able to delete it.

---

As said in comments, don't forget to

# mount -o remount,ro /system

or just reboot when you have finished. :)