Possible best and easiest method: you can use a live cd to burn that tar file to a CD or DVD. Since it will use the live cd's
/usr/bin it will be able to use the dvd/cd player. Just mount the disc that has the tarfile and burn it.
Alernative to try and do it from your system:
- Reboot the machine.
- Press the ESC key while GRUB is loading to enter the menu.
- If there is a ‘recovery mode’ option, select it and press ‘b’ to boot into single user mode. Otherwise, the default boot configuration should be selected. Press ‘e’ to edit it.
- Highlight the line that begins with ‘kernel’. Press ‘e’ again to edit this line.
- At the end of the line, add an additional parameter: ‘single’. Hit return to make the change and press ‘b’ to boot.
Commands to reset sudo file:
chown root:root /usr/bin/sudo
chmod u+s /usr/bin/sudo
- Reboot and try to burn the tar file (hopefully only the wrong permissions for sudo is the problem).