Welcome to the Linux Foundation Forum!
Password reset for Ubuntu 10.10 RAID5 server
mtwo3
Posts: 1
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.
thanks
0
Comments
-
You need to access the hard drive whether it's placing it in another machine or booting from a LiveCD
From there, you must edit the files /etc/passwd and /etc/shadow and edit the lines for the user you want to change the password of. Write there *exactly* the same of a user that you haven't forgotten the password of (can be the same text from another computer).
Reboot the machine and you are ready to go
Regards0 -
How to do it depends upon a number of factors, such as what authentication method the server was configured with - standard (password is stored encrypted in /etc/shadow), or some sort of single sign-on such as YP or LDAP. I would boot with a Live CD/DVD, login as root, mount the server / directory somewhere, such as /mnt/server-root, then chroot to that directory. At that point, you should be able to use the normal passwd utility to update the password to something you and your colleague can remember. Alternatively, you can setup sudo on the server file system so that you can login as a normal user, and then reboot, login as yourself, "sudo su" to root, and run passwd to change the root password. Clear as mud, right? :-) Anyway, see if you can make sense out of this. If not, I'll try to do a step-by-step process map for you.0
-
woboyle wrote:How to do it depends upon a number of factors, such as what authentication method the server was configured with - standard (password is stored encrypted in /etc/shadow), or some sort of single sign-on such as YP or LDAP. I would boot with a Live CD/DVD, login as root, mount the server / directory somewhere, such as /mnt/server-root, then chroot to that directory. At that point, you should be able to use the normal passwd utility to update the password to something you and your colleague can remember. Alternatively, you can setup sudo on the server file system so that you can login as a normal user, and then reboot, login as yourself, "sudo su" to root, and run passwd to change the root password. Clear as mud, right? :-) Anyway, see if you can make sense out of this. If not, I'll try to do a step-by-step process map for you.
Your solution is way more elegant than mine0 -
As I understand it, you need the root password (root being the usual administrator user). Once you can log in as root you can change any users password. Here is a How To to recover lost root passwords:
http://www.debuntu.org/recover-root-password-single-user-mode-and-grub
Good luck0 -
raluxs wrote:As I understand it, you need the root password (root being the usual administrator user). Once you can log in as root you can change any users password. Here is a How To to recover lost root passwords:
http://www.debuntu.org/recover-root-password-single-user-mode-and-grub
Good luck
You can change any password without needing root's password although it's simpler if you get it first0
Categories
- All Categories
- 51 LFX Mentorship
- 104 LFX Mentorship: Linux Kernel
- 576 Linux Foundation IT Professional Programs
- 304 Cloud Engineer IT Professional Program
- 125 Advanced Cloud Engineer IT Professional Program
- 53 DevOps Engineer IT Professional Program
- 61 Cloud Native Developer IT Professional Program
- 5 Express Training Courses
- 5 Express Courses - Discussion Forum
- 2K Training Courses
- 19 LFC110 Class Forum
- 7 LFC131 Class Forum
- 27 LFD102 Class Forum
- 157 LFD103 Class Forum
- 20 LFD121 Class Forum
- 1 LFD137 Class Forum
- 61 LFD201 Class Forum
- 1 LFD210 Class Forum
- LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 611 LFD259 Class Forum
- 105 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 1 LFD273 Class Forum
- 2 LFS145 Class Forum
- 24 LFS200 Class Forum
- 739 LFS201 Class Forum
- 1 LFS201-JP クラス フォーラム
- 11 LFS203 Class Forum
- 75 LFS207 Class Forum
- 300 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 11 LFS244 Class Forum
- 36 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 140 LFS253 Class Forum
- LFS254 Class Forum
- 1.1K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 93 LFS260 Class Forum
- 132 LFS261 Class Forum
- 33 LFS262 Class Forum
- 80 LFS263 Class Forum
- 15 LFS264 Class Forum
- 11 LFS266 Class Forum
- 18 LFS267 Class Forum
- 17 LFS268 Class Forum
- 23 LFS269 Class Forum
- 203 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- LFS281 Class Forum
- 235 LFW211 Class Forum
- 172 LFW212 Class Forum
- 7 SKF100 Class Forum
- SKF200 Class Forum
- 902 Hardware
- 219 Drivers
- 74 I/O Devices
- 44 Monitors
- 115 Multimedia
- 209 Networking
- 101 Printers & Scanners
- 85 Storage
- 763 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 142 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 357 Ubuntu
- 479 Linux System Administration
- 41 Cloud Computing
- 70 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 78 Network Management
- 108 System Management
- 49 Web Management
- 68 Mobile Computing
- 23 Android
- 30 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 537 Off Topic
- 131 Introductions
- 217 Small Talk
- 21 Study Material
- 826 Programming and Development
- 278 Kernel Development
- 514 Software Development
- 928 Software
- 260 Applications
- 184 Command Line
- 3 Compiling/Installing
- 76 Games
- 316 Installation
- 61 All In Program
- 61 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)