la commande : chroot

Comment changer le mot de passe de root quand on est booter sur le
cdrom ou le net ..... (exemple pour Solaris ).
Idem sur Linux est autres unix ayant cette commande.

1. Aller sur OBP ( STOP A ou init 0 )
2. boot net (si jumpstart ) ou boot cdrom (software 1/2 )
3. fsck -F ufs /dev/rdsk/c#t#d#s# (disque système
   )
4. mount -F /dev/dsk/c#t#d#s# /a
5. /usr/sbin/chroot /a /sbinb/sh
6. passwd root
7. cd /
8. umount /a
9. reboot

Voila .... plus facile que de modifier les fichiers avec vi ... non ....


Pour en savoir plus : man chroot ....


exemple de man via Solaris :

System Administration Commands			       chroot(1M)
NAME

     chroot - change root directory for	a command
SYNOPSIS

     /usr/sbin/chroot newroot command
DESCRIPTION

     The chroot	utility	causes	command	to be  executed	 relative

     to	  newroot.  The	meaning	of any initial slashes (|) in the

     path names	is changed to  newroot for  command  and  any  of

     its  child	 processes.  Upon  execution, the initial working

     directory is newroot.
     Notice that redirecting the output	of  command to a file,
     chroot newroot command >x
     will create the file x relative  to  the  original	 root  of

     command, not the new one.
     The new root path name is always  relative	 to  the  current

     root.  Even  if a chroot is currently in effect, the newroot

     argument is relative to the current root of the running pro-

     cess.
     This command can be run only by the super-user.
RETURN VALUES

     The exit status of	chroot is the return value of command.
EXAMPLES

     Example 1 :	Using the chroot utility.
     The chroot	utility	provides an easy way to	extract	tar files

     (see  tar(1)) written with	absolute filenames to a	different

     location :
     example# cp /usr/sbin/static/tar /tmp

     example# dd if=/dev/nrst0 | chroot	/tmp tar xvf -
     Note that tar is statically linked, so it is  not	necessary

     to	copy any shared	libraries to the  newroot filesystem.
ATTRIBUTES

     See attributes(5) for descriptions	of the	following  attri-

     butes :
SEE ALSO

     cd(1), tar(1), chroot(2), ttyname(3C), attributes(5)
NOTES

     Exercise extreme caution when referencing	device	files  in

     the new root file system.
     References	by routines such as ttyname(3C)	to stdin, stdout,

     and  stderr  will	find  that the device associated with the

     file descriptor is	unknown	after chroot is	run.