Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Linux root Password Reset
Top Forums UNIX for Beginners Questions & Answers Linux root Password Reset Post 303008513 by hicksd8 on Saturday 2nd of December 2017 05:42:14 AM
Old 12-02-2017
You cannot change a root password using just grub. The system boots from a hard drive and the password is stored in encrypted form there.

IF you have access to the system console and IF you know what you're doing, you can boot from DVD IF you have the media and IF booting from DVD is not denied, and remove the root password.

Without solid knowledge of the Operating System (how to mount/dismount filesystems, what file(s) to change and exactly how to do that, it's far from easy. Even many system managers don't even know how to start the process without searching for it and, typically, asking a question on this forum. You need access to the console terminal to even start and servers are often locked away in a computer room.

Don't be too concerned. If it was that easy everybody would be doing it. Keep your security policy tight though.
 

10 More Discussions You Might Find Interesting

1. Cybersecurity

How to reset root password of old Unix System V

Hi all, This is first time I met unix in my life. I purchased old Scanning Elecron Microscope which came with 486/33MHz PC running Unix System V, ver. 3.6. The one simple user name/passw is known so I can boot and login. But can not shutdown! It asks root or su passw. I'm very sensitive not to... (6 Replies)
Discussion started by: 82026
6 Replies

2. UNIX for Advanced & Expert Users

Not able to reset mysql root password

Hi, My root password for mysql has some problem as it dosent allow me to login.... all commands to reset it failed. so I removed mysql yum remove mysql and installed it by yum install mysql mysql-devel mysql-server and it installed fine I gave chkconfig --levels 235 mysqld on... (1 Reply)
Discussion started by: viji19812001
1 Replies

3. Solaris

Reset lost superuser/root password in x86

I've come across this question during interview as Sys Adm. "How you reset lost root/superuser password on x86 system running solaris (8/9/10) which remotely located. (Not locally in front of you)" As much as I know, you must be physically in front of the server to reset the lost... (4 Replies)
Discussion started by: shahru
4 Replies

4. UNIX for Dummies Questions & Answers

Permission denied when changing root password after reset

I have a Solaris 10 machine that I didn't know the root password to so I went into single user mode and removed the password from the shadow file and rebooted and I am able to login with no password now. But my problem is that when I try to change the root password from no password to something... (0 Replies)
Discussion started by: darkone_d1_2000
0 Replies

5. UNIX for Advanced & Expert Users

How to reset the ldap root password?

How to change the ldap root password. I have generated the password by using "slappasswd " command, but In my root machine "/etc/ldap/sldap.d" file is not there. instead of the file sldap.d directory only is there. please help me...? (0 Replies)
Discussion started by: ungalnanban
0 Replies

6. Red Hat

Fedora reset root password

I need some help with Fedora. I am trying to reset the root password. When I tried to login I was not able to. I kept getting the authentication failure message. I got the password reset success message. passwd: all authentication tokens updated successfully. I then thought maybe the root... (6 Replies)
Discussion started by: cokedude
6 Replies

7. Emergency UNIX and Linux Support

Reset AIX root password without shutting down the system

Hi All, I'm stuck in a severe problem here , Someone have changed the root password and he cannot remember it and there is no other user privileged user on the system , But I do have access to a non privileged user. On the top of the system an application which requires a theoretical ... (5 Replies)
Discussion started by: h@foorsa.biz
5 Replies

8. Solaris

solaris 8 reset root password from OSX

Hello, I have two old Solaris machines $ uname -a SunOS unknown 5.8 Generic_117350-39 sun4u sparc SUNW,UltraAX-e2 unfortunately, it has been so long ago that i have used these that the root password has left my head... i can log into one of the machine as a normal user, but am unable to... (4 Replies)
Discussion started by: Norman Khine
4 Replies

9. Solaris

How to reset forgotten mysql root password?

Hi All, I just found one thread on this forum on this subject here: Forgot MYSQL password root | Unix Linux Forums | Web Development but unfortunately the issue was not resolved. I have the same problem with the same error message. The background is that I built a Solaris 11 x86 server... (11 Replies)
Discussion started by: hicksd8
11 Replies

10. UNIX for Beginners Questions & Answers

Giving password reset access to non-root user, in LDAP

Hi, We have two LDAP servers. Whenever we get a ticket to reset the password, we login to LDAP primary server and reset the password. For below example, I logged into primary LDAP server and resetting password to john to Welcome123# We are giving this work to tier-1 team, so that they can reset... (1 Reply)
Discussion started by: ron323232
1 Replies

LEARN ABOUT OPENSOLARIS

systemd-ask-password-console.service

SYSTEMD-ASK-PASSWORD-CONSOLE.SERVICE(8) 	       systemd-ask-password-console.service		   SYSTEMD-ASK-PASSWORD-CONSOLE.SERVICE(8)

NAME

       systemd-ask-password-console.service, systemd-ask-password-console.path, systemd-ask-password-wall.service, systemd-ask-password-wall.path
       - Query the user for system passwords on the console and via wall

SYNOPSIS

       systemd-ask-password-console.service

       systemd-ask-password-console.path

       systemd-ask-password-wall.service

       systemd-ask-password-wall.path

DESCRIPTION

       systemd-ask-password-console.service is a system service that queries the user for system passwords (such as hard disk encryption keys and
       SSL certificate passphrases) on the console. It is intended to be used during boot to ensure proper handling of passwords necessary for
       boot.  systemd-ask-password-wall.service is a system service that informs all logged in users for system passwords via wall(1). It is
       intended to be used after boot to ensure that users are properly notified.

       See the developer documentation[1] for more information about the system password logic.

       Note that these services invoke systemd-tty-ask-password-agent(1) with either the --watch --console or --watch --wall command line
       parameters.

SEE ALSO

       systemd(1), systemd-tty-ask-password-agent(1), wall(1)

NOTES

	1. developer documentation
	   https://www.freedesktop.org/wiki/Software/systemd/PasswordAgents

systemd 237												   SYSTEMD-ASK-PASSWORD-CONSOLE.SERVICE(8)
All times are GMT -4. The time now is 10:26 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy