When you enter a recovery mode in Ubuntu, the root filesystem gets mounted as "ready-only" by default, not allowing you to update or recover any file in the root file system.
You can actually remount a filesystem as read-write on-the-fly by using mount command.
To remount the root filesystem as read-write:
Subscribe to Ask Xmodulo
Do you want to receive Linux related questions & answers published at Ask Xmodulo? Enter your email address below, and we will deliver our Linux Q&A straight to your email box, for free. Delivery powered by Google Feedburner.
Did you find this tutorial helpful? Then please be generous and support Xmodulo!