Questions regarding passwords and the use of them. Where and when it is needed for system security.

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1
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1answer
2k views

How to reset my password without rebooting?

I lost my password to a VM running 11.04, but have ssh access via public key authentication. Is there any way I can reset the password without a reboot? (This is to avoid downtime of services it's ...
1
vote
1answer
536 views

How can I change my password? [closed]

How can I change my password? I have looked around Ask Ubuntu but haven't found anything promising. A few answers got me close, but the advice always came from a more advanced user. I am new to the ...
0
votes
1answer
91 views

ssh keeps asking for a password

I am trying to set up an MPI cluster, following Setting Up an MPICH2 Cluster in Ubuntu tutorial. At the end of step 7, it says that I should not receive a password request, which unfortunately is not ...
0
votes
1answer
67 views

Download apps in ubuntu software centre

I am having a problem authenticating in Ubuntu 12.04. I have no password. I have bought my computer online. There is no password when I log in. It's showing me unsuccessful password. So I cannot ...
0
votes
1answer
271 views

unable to install softwares or update ubuntu12.04 LTS due to root password

I am unable to update Ubuntu 12.04 LTS due to root password. I have set a password for admin during installing ubuntu but after that I had changed my admin account to standard account. After changed ...
0
votes
1answer
2k views

How can I delete my printer from Ubuntu?

Using 12.04 my printer a canon ip2600 will not print. SystemSettings/printers shows it as installed, connected to local host, enabled, accepting jobs, shared and allowing printing for everyone. Yet ...
0
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0answers
121 views

how to back to be the administrator in ubuntu 11.10 [duplicate]

Possible Duplicate: How do I add myself back as a sudo user? I was exploring in user accounts. I only have my account but i changed from administrator to standart. and I didn't can put to ...
-1
votes
3answers
188 views

How to get Ubuntu to ask for my password at login screen again?

I used to have a password prompt but then I, from somewhere in User Accounts, unchecked "Require a password for login." Now, I want Ubuntu to prompt for a password again at login screen, mainly ...
25
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1answer
1k views

How to know if a authenticate box is real or fake?

For example, someone creates a fake Authenticate dialog to get my root password. How to know if it is real or fake?
25
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1answer
11k views

Force the user to change their password at first login

When I add a new user to my system I set a password and tell it to the new user. If the user doesn't like it, he/she can change it. However in my opinion it is better to force the user to change ...
6
votes
1answer
49k views

Samba and User Acount Passwords

Is it possible to tie your login password to your samba password? Ideally every 30 days, users need to change their passwords to login into the machine and if its possible, when they update their ...
11
votes
3answers
27k views

Find the password for the currently connected wireless network

I want to find the password for the wireless network that I am currently connected to (and I entered the password when connecting to the network). How can I do this in Ubuntu?
9
votes
5answers
47k views

How can I unlock a password locked rar file without knowing the password?

I have .rar file that is password protected, but I accidentally have forgotten the password. The file extremely important to me. How can I get my file back? In windows, there was many programs that ...
19
votes
2answers
5k views

Disable password access through SSH?

I'm setting up a server for backing up my desktop box remotely. I want to prevent remote password access to the server, permitting only users with private keys (AKA my desktop box) to access it. How ...
8
votes
2answers
3k views

How to make Firefox use the Gnome Keyring vault for password storage and retrieval?

With Chrome it is quite simple to use Gnome Keyring for password storage. But with Firefox 4 on ubuntu 11.04, I don't know how to achieve this. I remember that firefox 4 supposedly has OS integration ...
5
votes
2answers
3k views

How to change/create password keyring

when I try to remote desktop to the server from another ubuntu machine using the remote desktop viewer, it asks me to enter the password, which I do, then the viewer pane just goes black. When I come ...
4
votes
1answer
1k views

How do I change passwords that have been saved in the keyring?

I created a saved password via System ▸ Preferences ▸ Passwords and Encryption Keys ▸ File ▸ New ▸ Stored Password. How can I update it?
3
votes
0answers
153 views

Lock screen asks for password on no-password account

The Ubuntu lock screen always asks for a password even when the account does not have password. In my opinion, it should be exactly like the login screen: a button "connect >" for accounts that don't ...
9
votes
5answers
16k views

How do I unlock a user account?

I've been to system settings and to User Accounts. My account is the only one on the system and I have previously been able to UnLock the screen so that I could set my account to login without ...
6
votes
2answers
13k views

Encrypting Files and folder through terminal

I am new to part of encryption on Ubuntu . Is there any way to encrypt files and folder with password from terminal ? without using truecrypt or cryptkeeper etc.
6
votes
2answers
22k views

How to reset a password from kwallet?

How to reset a password from kwallet? I've read about a kwallet GUI that could be installed from synaptic, but I found nothing. Actually, it shows a GUI asking me the password, so is must have ...
5
votes
4answers
314 views

Cannot unlock session if user has no password

I created an account with no password for my 3 year old child. After some time of inactivity on that account, the session locks. Then I cannot unlock the session. Trying to unlock with an empty ...
3
votes
2answers
2k views

Password protect files/folders using cli

I have some important documents that I need to protect from anyone else having access to my machine. The problem being the other persons have access to my machine via root account so changing the ...
2
votes
1answer
138 views

Log in with a password

I have not enabled auto login, but I can still log in to my account without entering my password. I want to turn this option off and let Ubuntu ask me for my password before logging in. This is only ...
2
votes
1answer
1k views

password does not work for everything “anymore”!

I did set my password as I installed Ubuntu some months ago, and all is running flawless up to few days ago. Since then, although I did never change my password, the whole authentication is not ...
6
votes
1answer
1k views

Yubikey Two-factor Authentication Full-disk Encryption via LUKS

I recently acquired a Yubikey Neo - a nifty little hardware second factor authentication device. It's primarily intended for use with One Time Passwords, and the emerging U2F protocol - but since ...
6
votes
3answers
6k views

How to set user passwords using passwd without a prompt?

I am writing a script to add a large amount of users to a system. Part of this involves setting default passwords for each user. How can I set users' passwords without it prompting me for the password ...
4
votes
3answers
2k views

My PC does not ask password in Login even if I set it to ASK on login

When I first installed Ubuntu 11.04 I marked NOT to ask password in login. Then, ofcourse, it didn't ask me password on login. But now I want the OS to ask login password as I have many critical datas ...
4
votes
3answers
12k views

Where are passwords stored?

How do you figure out where are user's passwords stored, for users that can login? I know the system is using LDAP for users (username, home path, etc.), but it doesn't contain any kind of passwords. ...
2
votes
1answer
439 views

Remove startup password when default login is command line

When I boot up my computer, it goes straight to the command line. I modified /etc/default/grub file from GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to quiet splash text. Can someone please explain ...
2
votes
3answers
90 views

Could up-arrow key in terminal is a risk when encrypting using 7z?

We know that 7z can be used as an encryption method and that up-arrow key is used to see what commands and what tasks had done, so it can be use to reveal the password because in this case passwords ...
2
votes
2answers
688 views

Multiple passwords per user

Is it possible to allow multiple passwords to log on to Ubuntu for the same user? I have also possibly considered having two users share a home folder, but I am not sure if that is safe. If anybody ...
2
votes
0answers
854 views

I can log in with my password, but it's not accepted as valid for authentication

I can log in with my password just fine, but when trying to use sudo to run commands or authenticating to install software, my password does not work and my account is an administrator account. ...
1
vote
4answers
8k views

ubuntu 13.04 claims my root password wrong

while opening the bleachbit(as root) , gedbi and bootup- manager , it asks for the root password and on entering the password shows that the password is wrong , for other things like updating , ...
1
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0answers
1k views

wireless security (wpa + wpa2) passwords not accepted; wireless security = 'none' is functional [closed]

Hi I am new to Linux coming from Mac. I have several macs and formerly windows systems connecting to Netgear wpn824 router wirelessly. I just installed Ubuntu 11.10 on my daughter's Samsung NC-20 ...
1
vote
0answers
3k views

What is default username & password for a persistent pendrive? [duplicate]

Possible Duplicate: Live CD asks for a username and password I am trying out Ubuntu 11.04 on a netbook. I created a live USB to boot from using this: ...
1
vote
2answers
2k views

How to protect hard disk?

I have 320 GB hard disk on my laptop and I have installed Ubuntu 11.04 on 1 partition and another partition is reserved for storage. I want to protect that storage partition with a password. How can I ...
0
votes
1answer
3k views

remember wireless password in kde

I've got kubuntu 12.04.3 LTS installed. Don't know why - whether it's a default option or I've made this - but KDE always keeps asking me for the wireless connection password and it's annoying a ...
0
votes
3answers
5k views

Is there a way to reset Windows XP administrator password? [closed]

Can I reset a Windows XP administrator password? How would I do it?
9
votes
1answer
301 views

How can I protect my data when lending my computer to someone?

I'm going to lend an old PC with dual boot (Ubuntu and Win XP) to a friend for few days. Ubuntu contains a lot of data that I want to keep confidential. I have protected my session with a strong ...
5
votes
1answer
179 views

password on resume

I would like to not have to enter my password on resume after closing the lid on my laptop. I used to be able to do this but can't find the option anywhere anymore. all the notes I have found say go ...
4
votes
2answers
2k views

How do I approve specific computers to ssh into a machine with password authentication disabled?

The instructions in help.ubuntu.com/community/SSH/OpenSSH/Configuring recommend disabling password authentication so that "it will only be possible to connect from computers you have specifically ...
4
votes
1answer
4k views

Expect script that enters a username and password

I am trying to run an expect script, that everytime the prompt says user@blah's password, it enters the password I have the following expect script but it seem to be acting up. Can anyone tell me ...
3
votes
1answer
259 views

How to enable autologin but still require password

I am running Ubuntu GNOME 14.04, using gdm display manager and gnome-shell environment and I need to achieve the following behaviour: after boot, a selected user is automatically logged in, but a ...
3
votes
1answer
330 views

Google asks me to login every time I reboot

My online account for Google loses the password every time I reboot my machine. I have a two tier log in to my Google account as it is managed by my employer. I am aware that this has been dealt ...
3
votes
2answers
580 views

Wubi overwrites my Ubuntu username to Administrator and ignores my password

I know there are ways to get your root access back and change your password, but every time I try a new flavor of Ubuntu (installing using Wubi) my username/password is ignored. After installing and ...
3
votes
1answer
348 views

Lock screen turn off and on : Goes to a loop asking to enter password to unlock- then turns off again.

I recently updated my laptop from 12.04 to 12.10. And now, whenever I lock screen with "CTRL+ALT+L", the screen locks, and monitor turns off. But within 30 seconds, it turns on and asks for password. ...
3
votes
1answer
461 views

Use one password for administration and another for system login

How can I give a user one password for normal usage when logging in, and another password for system administration and sudo access? I want one user to have two passwords.
3
votes
2answers
4k views

Run Bash Script as Root

Is there some way I can run a Bash script as root without being prompted for a password every time? I'm attempting to automate the process of starting my LAMPP install, which requires me running a ...
3
votes
1answer
7k views

Terminal problems entering password

Every time I try to enable shell theme extension or anything in general in Terminal it asks me for a password but won't accept it.