I have a partition mounted from /dev/sda3 to /foo. It appears that it is not writable. I cannot change this with "chmod /foo 777", so how I can do this?
Edit: by your comment I see this hasn't got anything to do with the partition being mounted read-only. Just run the chmod with sudo, in case you weren't doing that already. Failing that try adding 'defaults' to the mount options first. Remember to edit