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

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12
votes
1answer
2k views

How to disable all password prompts?

Anything I want to download or to perform the easiest tasks, I am prompted for my password. All though this is an excellent security feature, it is a real inconvenience. I tried sudo visudo and ...
12
votes
5answers
57k 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 ...
11
votes
1answer
1k views

Why is there an inconsistency in base64 output?

I am using the java based neo4j graph database on lubuntu 15.04. The neo4j HTTP authentication header uses base64 encoding of 'username:password' (not including quotes). Using wireshark I can see ...
11
votes
5answers
7k 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? ...
11
votes
3answers
7k views

ssh never ask for a password

Somehow my SSH never wants to ask me for a password. So I setup a VPS on some random server somewhere in the world and I want to connect to it with ssh. I can setup a key, but when I do this: ssh ...
11
votes
6answers
4k views

Why can't non-admin users install software?

This is probably something I don't understand since I am used to Windows and am only starting out with Ubuntu. I know that software in linux comes in packages what I don't understand is why can't ...
11
votes
7answers
45k views

after 12.04 upgrade: can't log in although password is correct

I upgraded from 10.10 to 12.04, and now can't log in any more. The password is correct- when I type in a wrong one, I am told it's incorrect, while the correct one is seemingly accepted, but then just ...
11
votes
2answers
5k views

How do I get passwords from the keyring in the terminal for usage in scripts?

When you have a LUKS encrypted drive in your computer, Nautilus or Nemo will show it under Devices as a drive with a little lock on it. When you click it, you need to enter a password. If you choose ...
11
votes
8answers
3k views

Unlock keyring prompts three times instead of one time

When I have "automatic login" activated, the "Unlock the Gnome Keyring" box asks for my password. But this happens three times. There are three boxes asking me for my password. In 10.04 the box ...
11
votes
1answer
2k views

Where is the per-user salt kept?

Where does Ubuntu keep the password salt for each user?
10
votes
5answers
1k views

Security risk in everyday use of an admin account (not root)?

The only thing that distinguishes my admin account from normal accounts is that my admin account is a member of the sudo group and can run sudo. Is it any less secure to use my admin account for ...
10
votes
3answers
17k views

No password asked at login screen just start session button with LightDM

When I first installed Ubuntu I choose NOT to ask me for a password at login. That was ok for that moment cause it didn't ask me any password at login. But now I want to be asked for a login password. ...
10
votes
2answers
3k views

What is the least insecure way to store a password that is used by a script?

I have a Bash script that automatically authenticates with a service using my username and password. The credentials are currently stored as plain text within the script. What precautions should I ...
10
votes
4answers
40k 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 ...
10
votes
2answers
359 views

How to make it so that a file can only be executed by root, but not as root?

There are certain applications that I don't want people to be able to open unless they have root privileges, however I do not want to give the programs root privileges. So how can I make it so that ...
10
votes
4answers
35k views

How do I turn off all the password prompts?

I've been using Ubuntu 12.04 LTS since release and am trying to figure out a couple things about all of these passwords and key-ring prompts that I've just been living with for a while. Ever since ...
10
votes
3answers
9k views

How do I get Ubuntu to ask me for a password at login again?

I just installed Ubuntu 12.10 and afterwards, I accidentally set the administrator account password to empty/null. This gave me problems when trying to do administrative tasks in the GUI, so after ...
10
votes
3answers
7k views

How to discard saved password for samba share in unity?

I access samba shares from unity on Ubuntu 11.10 and saved username/pass for it. Now, I want to use a different username. Each time I go to the share and open it, it just opens without asking for ...
10
votes
2answers
3k views

How secure is KeePassX?

I have hundreds of passwords, since I use a different random one for each website/service. They are all generated & stored with KeePassX, which can be synced to different computers and my android ...
9
votes
5answers
5k views

Why does Ubuntu force users to create a password upon installation?

There's been one problem I've had since I installed Ubuntu to run alongside Windows, I assume this would also be the same if it was installed to replace the other operating system as well, the ...
9
votes
1answer
8k views

Xubuntu: No password request after suspension

If I suspend my Xubuntu 12.10, and then take my computer off the suspension, it doesn't request any password. I have tried adding the gnome-screensaver on autostart settings, which I read somewhere ...
9
votes
2answers
6k views

How can I clear my cached gpg password?

I've tried: the SIGHUP method --> no succes the cache timeout in gpg-agent.conf --> it seems that this file is not read, althougt I have the 'use-agent' line in gpg.conf What should I do ?
9
votes
4answers
9k views

How to move wifi passwords to a new installation

I have an Acer Aspire ZG5 netbook which is currently running Jolicloud, but I've decided it isn't for me and plan to switch to Lubuntu or Xubuntu. However, I do lot of travelling and have many saved ...
9
votes
3answers
2k views

Is Gnome keyring safe?

I've always read keyring like Gnome-keyring is safe way to save credentials. I don't understand it. If I open my Gnome-keyring in my Ubuntu Desktop, I can right click any entry and click show password ...
9
votes
1answer
3k 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 ...
9
votes
1answer
315 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 ...
9
votes
1answer
185 views

Set a different passwords for unlock and sudo [duplicate]

I am running a single-user Ubuntu install. When I enter the password to unlock my screen after suspend/timeout, it is the same password I use for sudo - my user password. Is there any way for me to ...
9
votes
5answers
18k 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 ...
8
votes
3answers
20k views

How do I make Ubuntu not ask me for my password?

I'm confident that I do not need a password for my computer. How do I remove passwords for things like when the screensaver activates and installing software?
8
votes
3answers
23k views

Adding NOPASSWD in /etc/sudoers doesn't work

On 14.04 here. I SSHed into my machine, added the following line to /etc/sudoers: myuser ALL=NOPASSWD: ALL And then tried running: sudo mkdir /etc/blah ...and I'm being asked for my password. ...
8
votes
1answer
571 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.
8
votes
1answer
5k views

Storing passwords with python keyring

I'm using keyring library to store passwords in my python app. import keyring keyring.set_password('My namespace', username, password) keyring.get_password('My namespace', username) And this works ...
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 ...
8
votes
5answers
15k views

Unlock all private keys on Ubuntu, entering password only once at login

I login to Ubuntu 12.04 using a password. Later on, when I use my browser(Chrome), I'm asked for a password to unlock the keychain so that the browser can access my saved credentials for various ...
7
votes
1answer
42k views

Can't SSH in as root

I'm using the default installation of openssh-server for my Ubuntu 14.04 server. I can connect through the console as root like normal, with my username and password. When I try to SSH with the same ...
7
votes
3answers
436 views

How do I change my password?

How do I change my password for Ubuntu?
7
votes
2answers
5k views

How to make Chrome/Chromium remember passwords in the gnome seahorse keyring?

Is it possible to make chrome or chromium (as that comes default in the repos) to use the Gnome seahorse as password vault? I have not found a way to do this for Firefox either, but maybe a solution ...
7
votes
2answers
28k 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 ...
7
votes
1answer
3k views

What hash algorithm is used for passwords stored in shadow in 11.10?

I'm a little bit confused if it's MD5 or SHA.
7
votes
3answers
4k 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 ...
7
votes
4answers
10k views

Administrator account with no password is unusable

I tried removing my administrator account's password. Now that there is no password set for it, I cannot put a new one nor do any actions which needs administrator privileges. I tried different fixes ...
7
votes
3answers
8k 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 ...
7
votes
2answers
195 views

What are the reasons to have strong password at home?

For a typical home PC the security situation is following: No servers running, not even the SSH. Firewall is ufw running in simple mode: all outgoing allowed, all incoming denied. Torrents and DC++ ...
7
votes
2answers
12k 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 ...
7
votes
1answer
8k views

How to remove/change saved SVN passwords?

I'm using SVN from Eclipse and it has a feature that allows you to save the SVN user and password. It think it uses something called gnome-keyring to do so. The problem is that now I need to use ...
7
votes
0answers
10k views

Can I run sudo without entering a password? [duplicate]

Possible Duplicate: How to run an application using sudo without a password? I like Ubuntu, but I hate entering a password every time when I run a command with sudo. Can I avoid it?
7
votes
0answers
931 views

How do I reset my password? [duplicate]

Possible Duplicate: How do I reset a lost Administrative(root) password? I inherited a machine with Ubuntu desktop installed. It has a password in place and I have no idea what the ...
6
votes
2answers
6k views

Password not working in Graphical Applications (gksu)? Works with sudo

I am having a problem where when I try to run say GParted, when I am prompted for a password, it says "Incorrect Password" But when I enter the same password using terminal sudo gparted for example, ...
6
votes
6answers
283 views

What strategies (especially available software) do you use to keep passwords safe?

Inspired by the recent issue with the Gawker network sites, I've been re-evaluating my password management. What strategies do you use to keep passwords safe? I'm particularly interested in ...
6
votes
6answers
4k views

mysql-workbench and Gnome keyring daemon problem

when launching mysql-workbench I have the following warning: [12:13:49] coil@coil:~$ sudo mysql-workbench & [12:14:03] coil@coil:~$ ** Message: Gnome keyring daemon seems to not be available. ...