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

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5
votes
1answer
270 views

MD5 hashing with salt length of 5

I'm newbie in Ubuntu and currently using it for assignment. I've checked my encrypted password at /etc/shadow folder and found that my encrypted password using MD5 encryption, but my problem is the ...
5
votes
1answer
183 views

Multiple Passwords on One Account

I'd like to join three ideas into one interesting and sometimes useful feature. There was a question about using multiple passwords earlier this year, but it didn't receive much attention. I'd like to ...
5
votes
1answer
710 views

How to let Muon update manager run without entering a password?

How to prevent Muon from asking a password when installing updates? Adding user ALL=(ALL) NOPASSWD: ALL to sudoers does not help. sudo apt-get upgrade works without a password, but Muon is still ...
5
votes
2answers
2k 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 ...
5
votes
1answer
333 views

12.04 home encrypted and I have written down encryption passphrase. How to reset login password?

I set up a friend with 12.04 and he forgot his password. I encrypted his home directory and I have written down the encryption passphrase during the first boot. If he changed his password after I ...
4
votes
3answers
12k 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?
4
votes
3answers
3k views

Is there a way to lock my browser with a password?

It would be OK if it was only with my login password, but I would like to lock both midori and Firefox so that they cannot be used without entering a password. I'm running 12.04.
4
votes
1answer
241 views

How stop Ubuntu from reading my password out loud every time I log on?

I turned on a certain feature on the login screen and now my password is read out loud when I type it on login. What did I turn on, and how do I turn this back off?
4
votes
1answer
210 views

Why does the terminal not hold my root password for sudo? [duplicate]

I stopped using Ubuntu for a while (since 12.10) and recently came back to it. From what I remember, it used to only ask for the root password once for a terminal session (for sudo commands). Now it ...
4
votes
2answers
1k views

Standards accounts are able to get root access using sudo without password request

I have installed a particular software using the installer present using the command sudo ./install.sh. After the installation now all the accounts on my ubuntu laptop can gain root access by ...
4
votes
2answers
21k views

How can I delete a mail account in Thunderbird?

I missed one letter of my user name for my mail when add an account to Thunderbird. My mail is reachable in webmail with my browser, but is unreachable in Thunderbird. How do I delete an email ...
4
votes
1answer
4k views

How to make Ubuntu remember forever the password after the first time

Is it possible to make Ubuntu remember the password for any program after the first time it asks. I get asked for the password for Synaptic, for making a usb bootable, for connecting to the wifi ...
4
votes
3answers
2k views

Why does ubuntu 13.10 keep asking for my gmail password?

After upgrading to 13.10, I am now getting a prompt for my gmail password every time I log in. There is no indication as to which service or application needs this information. If I enter the correct ...
4
votes
1answer
790 views

How do I crate a virtual ftp user with preseted password using ftpasswd and bash

Hello command line gurus, I've created an ftp user like this: ftpasswd --passwd --name webftp --uid 33 --home /var/www --shell /bin/false What I like to do is to create the same user with a ...
4
votes
1answer
33k 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 ...
4
votes
1answer
2k views

Using word list to brute force encrypted partition

I used the Disk Utility to encrypt an external HDD about a month ago. Now it seems that I have forgotten the password. I have formed it according to a set of rules, so I have generated a word list ...
4
votes
4answers
7k views

Disable locking the screen after resuming from suspend

One thing I like for MacBooks is that they are usable within a second after opening their lid when they were on stand by. Ubuntu always requires me to enter my password when I resume from suspend, ...
4
votes
1answer
1k views

Software Center doesn't prompt for password

I'm using Ubuntu 10.10. The software center was asking me for password when I wanted to install/remove any application. Since last week, it doesn't prompt for password. Also, I have the same problem ...
4
votes
4answers
312 views

How can I prevent a user from changing their password? [duplicate]

I want to prevent a user from changing their own password. Additionally, if possible, I want to prevent them from changing it via sudo.
4
votes
1answer
502 views

How can I batch decrypt a series of PDF files?

I have a bunch of PDF documents I know the password for and would like to decrypt them. How can I achieve this?
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
9k 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. ...
4
votes
3answers
146 views

New admin account asking for a password?

I've made new admin account. I did not set a password for that account and it now asks me for the password. Since I can access the account as it automatically logs on when the laptop is turned on, can ...
4
votes
1answer
2k views

Wifi only accepts passwords of 5 or 13 characters

Installed Ubuntu 13.04 and when attempting to connecting to a home wifi network, the connect button is only click-able with passwords of 5 or 13 characters. Is there a fix?
4
votes
2answers
4k views

How to disable password on Hibernate/Suspend?

I have installed Ubuntu 11.10 and on suspend/hibernate I am asked for password. I couldn't find apps > gnome-power-manager > lock in gconf-editor. What's the solution for this?
4
votes
1answer
201 views

Is there a way that I can disable change password

I have 20 computers in a high school lab and I want to set up a standard student log in. This is done, the problem is that students can change the password to anything, is there a way to block this? ...
4
votes
1answer
169 views

Any reason to have a strong user password?

I recently decided to change my (very) strong user password to something trivial. This was mostly to eliminate frustration with typing a long password each time I sudo or whatever. My question is, ...
4
votes
4answers
2k views

How can I use my GPass data?

There are two parts here: It appears that GPass is dropped in oneiric so can anyone recommend a new password manager? Is there a way to open the file created with GPass, or do I need to recover the ...
4
votes
1answer
102 views

How to specify in password input dialog the language always to be English?

In Gnome I often enter sudo password when Russian language is being selected. It's so annoying to wait for password verification fail, to switch to English and retype the password! Is there a way to ...
4
votes
1answer
280 views

How can I make ubuntu ask for my password before mounting usb-drives? [duplicate]

I did some research and found my question asked already. It is a duplicate of is it possible to make ubuntu ask for my password before mounting usb-drives? the problem is, they did not answer that ...
4
votes
2answers
606 views

“System problem detected” password fail [closed]

I have multiple Ubuntu Precise servers and workstations, all of which suffer from the same really infuriating problem: when the "System Problem Detected" dialog comes up due to something or other ...
4
votes
1answer
2k views

How can I change the password of Deja-dup (Backup)?

How can I change the encrypted password of Deja-dup (Backup)? I have set the encrypted password, it worked in the first two days, but now every time the backup starts it asks for the password I type ...
4
votes
1answer
956 views

I broke logins to my server by fiddling with /etc/passwd and /etc/shadow

I am running an Ubuntu Server (with ebox/zentyal installed). I believe it uses a combination of LDAP users and local users but I currently cannot login (through SSH) with any of them. I was trying to ...
4
votes
1answer
886 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?
4
votes
1answer
3k 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 ...
4
votes
1answer
39 views

Set password aging for a group of users

With chage command we can change password expiry information for a user. Is there anyway to enforce password aging for a group of users?
4
votes
2answers
177 views

Will my data be safe if my laptop is stolen when there is FDE and auto-login?

My SSD supports Full Disk Encryption (FDE). I have enabled FDE and set a password in BIOS. In case my laptop is stolen or lost, I want nobody to be able to get my data. Is it now secure to allow ...
4
votes
2answers
3k views

How to avoid typing ssh-add everytime

I read and followed some online documentation on how to set up a ssh-agent so that I don't need to type in password every time I ssh to a remote machine. However, with the help of ssh-agent, I still ...
4
votes
1answer
183 views

Long passphrase for login and short password for screensaver

The situation is that: For the encrypted home directory, any passphrase less than 10 characters is useless at all. If someone physically get the harddisk, the data and the other sensitive password ...
4
votes
0answers
197 views

The information could not be retrieved. Maybe your internet connection is down? [closed]

I got this error from Ubuntu One Control Panel It could be related to: - I tried (at least) tow times upload 3GB file using web interface without success - I create copy of one file from-to sahred ...
4
votes
3answers
616 views

How to allow a “standard user” (no sudo) make IP config changes without requiring admin password

Anyone know if it is possible to have a "Standard User" account make IP changes (via GUI or terminal) without requiring the admin (sudo) password? I want the user to be able to change interface from ...
3
votes
4answers
3k views

How to extract saved password from Remmina?

I don't remember my password for one of my servers. I have a working connection saved and want to get the password from it. From Remmina faq: Q: How are my passwords stored? Are they secure? ...
3
votes
3answers
2k views

How to recover a deleted /etc/passwd?

I deleted the /etc/passwd file and cannot login now. I don't know the root password and tried lots of passwords, but none of them worked. How can I fix this?
3
votes
4answers
11k views

How to change password using usermod?

I am superadmin of a server and like to change password of an existing user . How can I do that ? I tried usermod -p 'new-password' john but it didn't worked ?
3
votes
2answers
15k views

I cannot enter my password in the terminal - can't install packages [duplicate]

Possible Duplicate: Nothing shows up on the screen when I type my password I can open a terminal (Ctrl-Alt-T) I can copy or type in the following: sudo wget ...
3
votes
1answer
291 views

Set 2 passwords for one user?

I need to set 2 passwords for a user, like: One password for normal usage and another one for sudo access. How is this possible?
3
votes
1answer
186 views

Why does the ubuntu password screen take longer on a wrong password?

I noticed that a check on a good password takes ~.5 seconds. However, if you give a password that is incorrect, it takes ~3 seconds to inform the user as such. Why is this?
3
votes
3answers
4k views

Enable/Disable Passwordless Login/Autologin Via GUI/Command Line

Before I ask the question, would someone please help stipulate the Ubuntu definition for these two seemingly identical but different terms (I've given drafts.): Autologin - When you power up the ...
3
votes
2answers
1k 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 ...
3
votes
3answers
7k views

“Authentication Manipulation Error” when trying to reset my password

To reset forgotten password in 12.04 LTS. I am able to boot the computer. i choose root option and then come to password changing. they ask me to enter new UNIX password which i do type. but at last ...