Root password

I may have erased my root password now I try to install but it does not work. after mounting /dev/dsk/c0d0t0s0 /mnt I do cd /mnt. then I type the terminal and do vi. but it said that the terminal is unknown and also I can access shadow to delete the password. what do i do wrong? If somoene know the step please let me know.
Thanks

Hi there,
I do not know how you lost your root passwd but the following is are the steps to recover the root passwd if you have wrongfully
change the shell for the root. I am sure you can use the same steps for your purpose.
Question:
Some root users like to manually change the shell of account root. The most possible mistake is to simply change the default shell "/sbin/sh" to "/sbin/ksh". Thereafter, you will fail to log on the root because of the error of "No shell".
To fix the problem, the only way is to change root shell from /sbin/ksh to /usr/bin/ksh in /etc/passwd. Since the /etc/passwd is owned by root and you can not log on as root any more, so how to solve the problem ?
The problem is caused because the user does not know there are no other shells but Bourne Shell in /sbin. Therefore the system can not find /sbin/ksh and you fail to log on the root because of "No shell".
/sbin/sh is a hard copy under root (/) file system to make the system usable even before the file system /usr is mounted. It is very useful for system maintenance.
Below is the solution for Solaris Sparc/Intel platform respectively.
Caution: This solution can be also used to break into a system to alter security sensitive files, only authority persons can use it. Any damage caused is under your own responsibility.
For Solaris Intel platform:
1. Note down the root file system, e.g., /dev/dsk/c0t0d0s0
2. Insert installation CD
3. Reboot the system
4. Press ESC at the Press ESCape to interrupt autoboot in 5 seconds prompt.
5. Press the F2 key (F2_Continue) at the Solaris Device Configuration Assistant
screen.
6. Press the F2 key (F2_Continue) at the Identified Devices screen.
7. Select the CD-ROM drive as the boot device from the Boot Solaris screen,then press the F2 key (F2_Continue).
8. Type b -s at the Select the type of installation: prompt.
9. Mount the root file system to /a. E.g.,
# mount /dev/dsk/c0t0d0s0 /a
10. Modify /etc/passwd to correct the mistake by
vi /a/etc/passwd, then change /sbin/ksh to /usr/bin/ksh in root entity
11. Unmount the /a directory and reboot the system.

Similar Messages

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    Solstice DiskSuite[TM] Software: How to Delete and Reset a Lost Root Password on a System With a Mirrored Root Disk [ID 1010755.1]
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    many thanks

    Hi,
    Halt your machine.
    Boot with fail-safe mode.
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    Mount the root disk and remove the password entry in /etc/shadow
    umount it.
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    umount it.
    reboot the server.
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