Per Gabor Vincze, o script dos fóruns do Ubuntu parece fazer um código decente:
#!/bin/bash
# This script will change all entries of the form /dev/sd* in /etc/fstab to their appropriate UUID names
# You must have root privelages to run this script (use sudo)
if [ 'id -u' -ne 0 ]; then # Checks to see if script is run as root
echo "This script must be run as root" >&2 # If it isn't, exit with error
exit 1
fi
cp /etc/fstab /etc/fstab.backup
sed -n 's|^/dev/\([sh]d[a-z][0-9]\).*||p' </etc/fstab >/tmp/devices # Stores all /dev entries from fstab into a file
while read LINE; do # For each line in /tmp/devices
UUID='ls -l /dev/disk/by-uuid | grep "$LINE" | sed -n 's/^.* \([^ ]*\) -> .*$//p'' # Sets the UUID name for that device
sed -i "s|^/dev/${LINE}|UUID=${UUID}|" /etc/fstab # Changes the entry in fstab to UUID form
done </tmp/devices
cat /etc/fstab # Outputs the new fstab file
printf "\n\nWrite changes to /etc/fstab? (y/n) "
read RESPONSE;
case "$RESPONSE" in
[yY]|[yY][eE][sS]) # If answer is yes, keep the changes to /etc/fstab
echo "Writing changes to /etc/fstab..."
;;
[nN]|[nN][oO]|"") # If answer is no, or if the user just pressed Enter
echo "Aborting: Not saving changes..." # don't save the new fstab file
cp /etc/fstab.backup /etc/fstab
rm /etc/fstab.backup
;;
*) # If answer is anything else, exit and don't save changes
echo "Invalid Response" # to fstab
echo "Exiting"
cp /etc/fstab.backup /etc/fstab
rm /etc/fstab.backup
exit 1
;;
esac
rm /tmp/devices
echo "DONE!"