Last updated on July 7, 2020 by Dan Nanni
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:
# mount -o rw,remount /
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