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Questions tagged [passwd]

Questions related to Linux 'passwd' command.

124 questions
13
votes
1 answer

Alternative to passwd --stdin in Ubuntu

I'm attempting to migrate an OpenVPN server from a CentOS box to an Ubuntu 18.04 one. There is a script which creates new VPN users. Part of this is that it generates a new password for the user and then passes this in as the Linux password for the…
shaneoh
  • 347
3
votes
3 answers

Special characters in password

I am looking for a list of the valid characters which can be used in a user account password on Ubuntu. man passwd just tells me: As a general guideline, passwords should consist of 6 to 8 characters including one or more characters from each of…
wim
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2
votes
1 answer

Importing users that will be installed by programs

I am migrating from an old Ubuntu 10.04 server to a different machine, upgrading to 14.04 at the same time. One of my tasks is to migrate the users, so I have exported a list of users with UID > 1000 on the old machine and then appended that list to…
Thomas Weller
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2
votes
1 answer

How to reset an user password without knowing his current password?

A colleague has just resigned. And his account is being used as a build account on our Ubuntu 16.04.6 LTS. Is there any way to reset his password without knowing his current password? I have tried sudo passwd $HIS_USER but it asks for current his…
Tuan
  • 121
1
vote
2 answers

When changing the password for a user on my system, why does the size of /etc/shadow never get bigger or smaller?

When changing the password for a user on my Ubuntu system, I've noticed that no matter the length of the password that I choose the /etc/shadow file will always stay the same size and never increase/decrease. How is this possible?
elliott94
  • 135
1
vote
2 answers

I changed the username by changing /etc/passwd

I did something REALLY silly - I did ... sudo vi /etc/passwd Then I changed the username to the user I wanted, I exited the file. Now - the user password no longer matches, I can't change the password as I can't enter the current password. I can't…
Sam Lamanite
  • 11
1
vote
1 answer

how to unlock passwd from the command "sudo passwd -l [user]"?

I locked the passwd for a user by using the command, sudo passwd -l [user] Then, how do I unlock the passwd for this user?
Smile
  • 1,099
0
votes
1 answer

Cannot bypass the password?

I forgot my Ubuntu password. I followed the steps given on your sites and I almost reached the end, but then my computer said: passwd: authentication token manipulation error I tried to do it again many times but it comes to the same result. I…
Shayan Tanweer
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0
votes
1 answer

Need advice on /etc/passwd

I am very new to Ubuntu but im picking up the coding relatively quickly --- I have Matlab/arduino experience... While attempting to set up a VPN, my brother decided to type ctrl-z while I was editing the /etc/passwd file and now I cant seem to find…
Zack
  • 1
0
votes
1 answer

What can I do when on a used computer I can not enter the administrator account?

I recently purchased a used computer, and the owner could not remember the administrater password. It has 13.04 on it.
user211110
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0
votes
1 answer

How to change password of user to very simple like 'w'?

It says at least 6 characters. I want to change to easy input. How to change password of user to very simple like one character 'w' ? Thanks
waterloo2005
  • 2,037
0
votes
1 answer

How to change to log in with password in 17-10.1?

I installed Ubuntu 17.10.1 to log in automatically without password. I would now want to set a password for logging in . I tried to do this but after change could not log in . How to do this properly? here is photo of my screen. screen photo
Kirby-1989
  • 163
-1
votes
1 answer

/etc/passwd file is corrupt and i cannot change it i also cannot login as root

I have attempted to change the file /etc/passwd in ubuntu server 12.04 and I tried to change the root username. I only changed one part of the root username this is what i have:…
user269398
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-1
votes
1 answer

Forgot Password But have SSH key access

I have SSH key access to my homelab ubuntu machine from my main computer and I didnt have to use the password for months. Now I am trying to access the machine from my laptop but I have forgotten the password. Is there a way to reset the password…
Gary Tanz
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-2
votes
1 answer

administrative passwd how to change it in the root

each time i go to the root and try to change my passwd an error occurs and it says authencation manipulation error or some thing like that.and btw the passwd s match. whoever knows whats happening please help.HOw DO I CHANGE MY PASSWD .
cjc
  • 1