Root Password Lost !!!


 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users Root Password Lost !!!
# 1  
Old 01-07-2003
Root Password Lost !!!

I've forgotten root password on one of Solaris machines, i searched in forumes to find a similar case but there's no proceudre here to reinintialize root password, cause most of related commands & even single user mode needs root password that i don't have.
Any solution would be helpful.
--rgrds,
nikk
# 2  
Old 01-07-2003
I'm pretty sure if you boot into single user mode from the CD then that should help you.
merlin
# 3  
Old 01-07-2003
Boot to single user mode and recover it from there.
# 4  
Old 01-07-2003
See this
minazk
# 5  
Old 01-07-2003
Step by Step

You need to use:

a) A console, or

connect a PC/notebook in the serial port using the apropiate serial cable:

1) If the Serial console use an RJ45 as Serial conector
use the cable provided with the machine, or
if you use cisco switches use the terminal DB9
(for the PC an the cisco cable to serial 1)
2) If the Serial console use an DB25 connector as
Serial conector use the cable provided with the
machine, or an HP Serial cable DB9 to DB25

Because the most common case is to use a serial connection
the rest of the post is


b) Open an Hyperterminal/SecureCRT or whatever and
open a connection via COM1 (9600-8-N-1-None) using vt100
emulation.

c) Send a shift-break to halt the system

d) at the ok prompt
OK boot cdrom -s

e) After boot
TERM=vt100
export TERM
mkdir /tmp/d0
mount /dev/dsk/c0t0d0s0 /tmp/d0
cd /tmp/d0/etc

f) Leave blank the second field of the /etc/passwd
vi /tmp/d0/etc/passwd
( delete the x an save :wq! )

g) reboot

h) when prompt for root passwd press enter

i) change root passwd
passwd.


Note: If possible that you need to run an fsck
example: fsck -F <FSTYPE> -y /dev/rdsk/c0t0d0s0
FSTYPE: usually ufs

Note 2: If you use Solstice Disksuite in order to mirror
boot disk, you need to copy the modified /etc/passwd
to the other partition. I.E.:

f.1) mkdir /tmp/d1
mount /dev/dsk/c0t1d0s0 /tmp/d1
cp -p /tmp/d0/etc/passwd /tmp/d1/etc/passwd


Last edited by hugo_perez; 01-14-2003 at 01:37 PM..
# 6  
Old 01-07-2003
depends on solaris/SunOS level

On with solaris level are you working on.

Since version 2.6 solaris ask you for enter the root password when you boot single user, so this will not help you.

the only way, as far i see is to boot from cdrom.
stop the installation fase and mount the root-file-system.
make a copy of the password file, reset the password field in the password file for user root.

reboot your system, set the password again.
# 7  
Old 01-07-2003
I have a box with Solaris 2.6 that work different

I have a box with Solaris 2.6 that work different,
never prompt for root password when I boot
from the boot prompt with boot cdrom -s.

The only password that I supply in same boxes
are the Firmware password if it's established.

Regards. Hugo
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Solaris

Lost Root Password on VXVM Encapsulated Root Disk

Hi All Hope it's okay to post on this sub-forum, couldn't find a better place I've got a 480R running solaris 8 with veritas volume manager managing all filesystems, including an encapsulated root disk (I believe the root disk is encapsulated as one of the root mirror disks has an entry under... (1 Reply)
Discussion started by: sunnyd76
1 Replies

2. SCO

unixware 7.1.4 lost root password

I dont have the cds, what can i do? (2 Replies)
Discussion started by: sopapa
2 Replies

3. UNIX for Dummies Questions & Answers

Lost root password unixware 7.1.4

Ive lost the root password , i dont have the cds , what can i do? (3 Replies)
Discussion started by: sopapa
3 Replies

4. UNIX for Advanced & Expert Users

Help with Lost Root Password

This is a common question im sure... I bought a RS/6000 Model 240. Aix 4.3.3 loaded. No root password was supplied to me, but I do have the install media (4 disks). I want to drop into maint mode. So I place the cd into the drive, restart the box ( by pressing the power button, since i do not have... (3 Replies)
Discussion started by: JoeJohnSmith
3 Replies

5. AIX

lost root password in AIX

Hi how do you reset the root password in AIX. I booted to single user mode and it asked for login and password. I have AIX 4.3. Thanks (4 Replies)
Discussion started by: Welfaric
4 Replies

6. UNIX for Dummies Questions & Answers

Root Password Lost

I'm attempting to blank out the root user password on a machine that we have forgotten the password for. I have been using the advice posted on this site to boot from CDROM in single user mode, then mounting the root slice and editing the /etc/shadow file. Each time I save the shadow file and... (1 Reply)
Discussion started by: gonzotonka
1 Replies

7. Linux

how to access root priveliges if root password is lost

wish to know how to access root password it root password is forgotten in linux (1 Reply)
Discussion started by: wojtyla
1 Replies

8. Answers to Frequently Asked Questions

Lost root password / Can't login as root

We have quite a few threads about this subject. I have collected some of them and arranged them by the OS which is primarily discussed in the thread. That is because the exact procedure depends on the OS involved. What's more, since you often need to interact with the boot process, the... (0 Replies)
Discussion started by: Perderabo
0 Replies

9. UNIX for Advanced & Expert Users

Lost Root Password

I have recently become the sys adm guy for our unix systems here for my shop. I have a pretty good understanding of the system, but there is just some stuff that I don't know. Right now one of those things is to recover the password for a unix system. I know that there is a way that you can use... (2 Replies)
Discussion started by: GlockCW
2 Replies

10. UNIX for Advanced & Expert Users

I lost my password root

Hello ... I lost my password root ! maybe someone can to help me to log in HP_UX, i started the server in " Singel - User" and i changed my password to new password and it`s not working .. what i must to do ??? (4 Replies)
Discussion started by: yanly
4 Replies
Login or Register to Ask a Question