Fedora safe/recovery mode

[Chuck Anderson]

On Sun, Mar 04, 2007 at 09:45:22AM -0500, Chuck Anderson wrote:
> On Sun, Mar 04, 2007 at 03:00:05PM +0100, Enrico Scholz wrote:
> > > tested this in fedora for some months, but last I checked, runlevel 1
> > > dropped the user directly in a root shell.
> > >
> > > Runlevel 3 is at least as safe as runlevel 5 and could be used with no
> > > security implications.
> > 
> > As long as Grub and the BIOS are not protected with a password by
> > default, we do not need to discuss this....
> 
> Does grub have a "secure" flag you can put in a stanza to require grub 
> to prompt for a password?  That would solve the security concern.

Answering myself:

 -- Command: lock
     Prevent normal users from executing arbitrary menu entries. You
     must use the command `password' if you really want this command to
     be useful (*note password::).

     This command is used in a menu, as shown in this example:

          title This entry is too dangerous to be executed by normal users
          lock
          root (hd0,a)
          kernel /no-security-os

     See also *Note Security::.


under *Note Security*:

   Also, you can specify an optional argument to `password'. See this 
example:

     password PASSWORD /boot/grub/menu-admin.lst

   In this case, GRUB will load `/boot/grub/menu-admin.lst' as a
configuration file when you enter the valid password.