still prevailed as the standard command. sudo update-grub and sudo update-grub2 are equivalent, so it doesn't matter which one you run. /usr/sbin/update-grub2 is just a symbolic link to /usr/sbin/update-grub . ek@Del:~$ ls -l `which update-grub update-grub2` -rwxr-xr-x 1 root root 64 May 17 03:07 /usr/sbin/update-grub lrwxrwxrwx 1 root root 11 May 17