How to add startup script to read-only /root system

[nammunayak]

Hi Everyone,

I have created read-only /root system in my Xubuntu system. Now root is read-only. Now If I want to add startup script to this system how I can add. Now /root path is /mnt/root-ro, not the default "/" path.

Can some one please help me how to do this?

Thanks,
Namratha.

[TheFu]

Which area did you make read-only?
* /
* /root - home directory for the "root" account.

I've never tried to run Linux with a read-only / partition. There are so many temporary files written to /var and /tmp and other places that I'd have to wonder how that would work on a normal HDD install? If the file system is read-only and you need to make a change, then you need to make the file system NOT read-only, make the change, then make it read-only again. The options to the mount command allow this. man mount will explain everything. Look for -o remount,ro and -o remount,rw as options.

I'm all for being secure and for having read-only file systems ... especially for web files.

To fix the path issue ... well, if the system is booting from the HDD and not a temporary drive, then it is in the correct place. Check the correct /etc/fstab to be certain.

[nammunayak]

https://help.ubuntu.com/community/aufsRootFileSystemOnUsbFlash

Using the above link I created my read-only /root file system. I am installing the Ubuntu in 16GB USB drive.

Hope this will help you to how to create a read-only /root file system and get an Idea

[TheFu]

Having a read-only /root isn't hard at all. It is having a read-only / that is difficult (/ is the "root" directory, not the /root directory). /root is the normal HOME directory for the root user; uid of 0 (zero). This is because /home might not be mounted when something goes wrong, so having a /root that is located in the same partition as /, so mounted by default, is why.

In other threads, the use of /root has confused people.