You booted to a cd and are trying to change root's password? You can't just use passwd since it's trying to write to the CD and it's not writeable. If you're trying to modify root's password on the system disk (/dev/dsk/c0t0d0s0 for example), you'll need to mount slice 0 and edit the shadow file.
Code:
# mount /dev/dsk/c0t0d0s0 /a
# cd /a/etc
# vi shadow
Delete the bit of garbage in field 2 and save the file. Then umount /a and reboot the system. Your password will be blank. Log in as root and set the password again.
I knew it would happen sooner or later....
We have a requirement that specific individuals need "sudo root" authority. I knew it only a matter of time before someone decided to change the root password (at least they owned up to it).
Now the question is how can I grant all rights except... (4 Replies)
Hello chiefs :)
I have a SUN Enterprise 250, running Solaris 8.5 - I have managed to be able to connect a dumb terminal to the box via a standard straight-through rj45 cable, to my ibm laptop. OK so Putty can connect to the box via ssh - nice! But I dont have the password for root - or any... (1 Reply)
I forget the Root Passwd of my Sun Netra 20 server and break the same by editing /etc/shadow.Now there is no passwd for Root.
And How to set new root passwd?Pls help.... (2 Replies)
Hi All,
Today I faced a problem trying to log in as root. The output error is
cannot execute sh: No such file....
I doubted there is something wrong with shell interpreter which resides in /etc/passwd file for every user who logs in.
I checked and the line for root account was... (4 Replies)
hi
i have a RHEL 4 and have forgot root passwd
tried to boot in by singel user and then changing the passwd but it's not letting me do that ......throwing some weird error as .......manipulation
i also tried to make a new user from CLI but even though it's not letting me in from that user as... (12 Replies)
I accidentally changed root shell from /bin/bash to bash in /etc/password, then logged out from root. Now I can't login as root and got "No shell" error, although I have root password. "su -f -s /bin/bash" command does NOT work. There is no GUI interface for this system.
My question: Do I have... (7 Replies)
Hi All
I had installed sudo in HP UX 11.3 and it is working fine but not able to make entry required to set permission similar to ROOT without using password (PASSWD) change option for define user in /etc/sudoers file
Please help if some know the syntex? :confused::wall: (2 Replies)
i do not have root on a solairs 10 server , however i do have the root role, i was wondering if I can change the root password as a a role with the passwd command? I have not tried yet.
and do i have to use the # chgkey -p afterwards?
i need to patch is why i am asking.
thanks (1 Reply)
Discussion started by: goya
1 Replies
LEARN ABOUT DEBIAN
sulogin
SULOGIN(8) Linux System Administrator's Manual SULOGIN(8)NAME
sulogin - Single-user login
SYNOPSIS
sulogin [ -e ] [ -p ] [ -t SECONDS ] [ TTY ]
DESCRIPTION
sulogin is invoked by init(8) when the system goes into single user mode. (This is done through an entry in inittab(5).) Init also tries
to execute sulogin when the boot loader (e.g., grub(8)) passes it the -b option.
The user is prompted
Give root password for system maintenance
(or type Control-D for normal startup):
If the root account is locked, no password prompt is displayed and sulogin behaves as if the correct password were entered.
sulogin will be connected to the current terminal, or to the optional device that can be specified on the command line (typically /dev/con-
sole).
If the -t option is used then the program only waits the given number of seconds for user input.
If the -p option is used then the single-user shell is invoked with a dash as the first character in argv[0]. This causes the shell
process to behave as a login shell. The default is not to do this, so that the shell will not read /etc/profile or $HOME/.profile at
startup.
After the user exits the single-user shell, or presses control-D at the prompt, the system will (continue to) boot to the default runlevel.
ENVIRONMENT VARIABLES
sulogin looks for the environment variable SUSHELL or sushell to determine what shell to start. If the environment variable is not set, it
will try to execute root's shell from /etc/passwd. If that fails it will fall back to /bin/sh.
This is very valuable together with the -b option to init. To boot the system into single user mode, with the root file system mounted
read/write, using a special "fail safe" shell that is statically linked (this example is valid for the LILO bootprompt)
boot: linux -b rw sushell=/sbin/sash
FALLBACK METHODS
sulogin checks the root password using the standard method (getpwnam) first. Then, if the -e option was specified, sulogin examines these
files directly to find the root password:
/etc/passwd,
/etc/shadow (if present)
If they are damaged or nonexistent, sulogin will start a root shell without asking for a password. Only use the -e option if you are sure
the console is physically protected against unauthorized access.
AUTHOR
Miquel van Smoorenburg <miquels@cistron.nl>
SEE ALSO init(8), inittab(5).
17 Jan 2006 SULOGIN(8)