tricky root password reset, selinux
location: linuxquestions.com - date: August 24, 2005
I've run into a problem - my machine had to reboot and now there's always some fsck during bootup and it want's the root password, unfortunately I forgot that one... [no more comments on that :-(]
So I started first by booting knoppix and resetting the password in /etc/shadow, but the hd with /etc on it was not mountable?! (selinux problem?)
So I tried booting into single user mode with the following addition to the kernel line in grub:
Then I got a bash, but the filesystem was mounted read-only so passwd and changing the shadow file was not possible.
What's going on? Could anyone help my resetting my password?
location: ubuntuforums.com - date: February 11, 2013
Hello All, Looking for a method to DISABLE the ability to reset a password by using the following method.
I'm not going to forget my password, that's a noob thing to do. I'm seeking the most secure accounts out there. Any other tips would be appreciated.
(would setting a root password prevent this? just looking for a password to be necessary at least)
Debian root password reset
location: linuxquestions.com - date: February 8, 2008
I have a debian machine that I am in charge of administering. I inherited it from someone else, and did not know the usernames or passwords that I was supposed to use.
I booted the machine using a knoppix cd, and succeeded in changing a regular user's password by using the passwd command. I copied it from the system HD to /etc/passwd, ran the passwd command to change the password, and then copied the file back. After this process I was able to log in as the user whose password I changed.
I was unable to log in as root after following the same process. I tried multiple times to make sure I didn't skip a step. I can still log in as my normal user, but can't log in as root or su to root. I did a diff on the original shadow file and the new shadow file, and the root line had changed.
How do I reset the root password. Does debian handle the root password differently than normal password?
Debian GUI Logon Password Reset
location: linuxquestions.com - date: June 17, 2010
Our Security Admin left the company and did not supply the Debian GUI passwords, so I cannot logon to the server using the GUI. However, I can log in using something like putty.
How can I reset the gui passwords.
forgotten superuser password reset
location: linuxquestions.com - date: March 2, 2010
We use a linux (centOS I believe) cluster for our research. My professor somehow forgot the new password he set for root, and now can't login as 'su'. What is the way (or best way) to reset the root password without damaging something. I don't know whether it's even setup for 'sudo'. What will the procedure with and without 'sudo'?
LDAP password reset on ssh connection attempt
location: ubuntuforums.com - date: November 5, 2008
I have a Ubuntu 8.04 LTS server running on LDAP account management. I further have sshd running, but a
statement in my /etc/ssh/sshd_config, because there are a lot of users, and I don't want people to access the server via ssh.
The problem now is, that if anybody still tries to log in via ssh, their password is automatically changed! This is very anoying, because if some script-kiddy tries to hack the system, they try a lot of users, and will certainly hit one of the existing accounts. This results in a changed password for the corresponding user..
Does this problem sound as a miss-configuration to you, or is it rather a root-kit, or something similar?
Thanks a lot in advance..
Root password reset problem
location: ubuntuforums.com - date: April 14, 2013
For first time ever I installed Ubuntu yesterday. Version 12.10. Installed it via LiveUSB and overwrited the Windows Vista I had in the installation.
The computer I'm using is an old DELL Inspiron 1525.
Everything worked great until today when I got tired of always have to write the long password I made when installing. So I choosed to not have any password on my usernames (administrator account). I also made another administrator account, but deleted it instantly as I thought it would be no idea to use it anyway (we're often two people using this laptop so that's why I had it in mind first but changed my mind).
Now, the authoriazing (or whatever it may be called in English) is not working, or as somebody said the root password.
I googled and found out how I can change it in the recovery mode that I access by holding down SHIFT button on boot up. I tried doing this like 4 times now but got nothing to pop up. Tested hold it in all way, tried press it several times and all kind of way
Samba Password Reset?
location: ubuntuforums.com - date: February 13, 2011
I somehow changed a setting or 2 and now anytime I try to access my ubuntu machine via my Windows Machine (Samba Server on Ubuntu Machine). Anytime I try to access the machine it asks me for my password...I enter it but it says it is invalid....is there anyway to reset it?
I have already tried to remove and purge everything Samba related and then tried reinstalling, but that still didn't do anything
Password reset for Ubuntu 10.10 RAID5 server
location: linux.com - date: May 22, 2011
My most sincere apologies if this is the wrong place to put this question but i'm a little desperate.
A friend was supposed to help me setup a Linux Server and after some time of not using the server because it was missing a drive i got tired of waiting and decided to rescue my data. Now i'm stuck at the login prompt and he has forgotten the user ID.
how can i recover the password for this server? I've done some looking up and there seems to be several methods, but i'm a total noob at Linux and I need step by step help. pleeeeeease.
location: linuxquestions.com - date: May 23, 2013
Anyone up for a challenge? I have very little Linux experience and have a backup controller running Linux. I am trying to get to grub menu, just 1 step towards resetting the root password, instructions from other site.
After it runs post the screen ends up at a login which I do not have the account.There is no documentation for this unit and I have tried to use the left shift and or the ESC key to enter grub w/o luck.
I get a “grub loading stage 1.5" message. Then “Grub loading please wait”, but it just goes striaght to the login screen.
I do not know what flavor of Linux this controller is running, hence the challenge.
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