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

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3
votes
2answers
9k views

Admin password authenticates to log in, but not to install apps or change user accounts

I just installed Ubuntu 12.04. Then I changed my own user profile to not require a password and log me in automatically. What happened is, I'm still asked for a password once the desktop diplays. Once ...
2
votes
2answers
805 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 ...
0
votes
2answers
2k views

How do I set a password for guest login? [duplicate]

I'd like to set a password for the guest account. How can I do this? (This question is not answered under the similar question in this forum, see below.) The last time this was asked on this forum ...
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 ...
6
votes
1answer
340 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?
6
votes
1answer
1k 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 ...
6
votes
2answers
776 views

Why I'm not asked to set a password for Root when Installing Ubuntu?

When I install Ubuntu, it never shows an option to set a password, yet there is a password when trying to log in to the admin account and when I try to install packages. I can't change the password in ...
5
votes
3answers
1k views

Passwords in the Password/Encryption Keys program

I noticed that I have passwords in the Password/Encryption Keys program . It appears that anybody who walked up to my computer could go look at all my passwords without needing a master password. Did ...
4
votes
1answer
739 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
3answers
5k views

why doesnt ubuntu 13.04 prompt me for a password after suspend?

I am on 13.04 and waking from suspend takes me straight to desktop without a password prompt even though it is set to ask for a password in the brightness and lock settings. Also I recently tried to ...
4
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
2answers
2k views

How to set up GRUB2 password in an easy way?

I need to setup password for GRUB2 on Ubuntu 14.04 LTS amd64. The setup I am trying to reach is to have [e]dit and [c]onsole options protected by password, but booting of operating system entries ...
3
votes
2answers
118 views

What would be the concept behind the password not being echoed on cli

I am curious to know why the password characters(special characters) are not echoed when we login to the system via a terminal. But we can see the password characters(special characters) while we ...
2
votes
1answer
962 views

Run script with arguments as sudo without being asked for password

I have two programs in Java that I'm calling from bash script: java program1 arg ... arg sudo java program2 arg ... arg I want to run program2 as sudo without being asked for password. I'm aware of ...
2
votes
2answers
300 views

How can I make it possible for all users to log in without a password?

I have a system with two accounts. The primary (and administrator) account automatically logs in at boot time and is used 95% of the time. On occasion I need to logout and switch to a secondary ...
2
votes
1answer
7k views

Why won't Ubuntu installed using Wubi accept my password?

I can boot into Ubuntu just fine as a guest but it refuses to accept my login name and password that were set during the Wubi install. I reinstalled it again with basic login and password just to make ...
2
votes
2answers
19k views

I cannot enter my password when using sudo to install Sophos AV for Linux [duplicate]

I cannot type my password as shown below. After successfully unlocking root account in Ubuntu 12.04 LTS. saintmichael@ubuntu:~$ sudo usage: sudo [-D level] -h | -K | -k | -V usage: sudo -v [-AknS] ...
2
votes
5answers
22k views

Authenticate user that has no password? [duplicate]

I've set up my user account so that no password is required to login and I need to install some updates. However when prompted for the password, it says authentication failed if I leave the box ...
2
votes
1answer
1k views

Setup auto login and now I do not have root authorization for anything

I am the sole user of my computer so I use my root user name for everything. I am tired of logging in all the time and entering a keyring so I was hoping that creating an automatic login would resolve ...
1
vote
3answers
240 views

Encrypted home dir: Cannot login after sudo password reset

I have a user, say secretuser, with an encrypted home directory. Unfortunately I forgot the password for user secretuser, because it was very secret. So I loggged on with another admin user, say ...
1
vote
3answers
94 views

Why is sudo by default asking for the password of the user that ran it?

I'm wondering why does sudo actually NEED the password, when the user has already logged in? The fact that the user has managed to run sudo means that the user has passed authentication and is ...
1
vote
3answers
24k views

sudo su fails with 'Unable to change to sudoers gid :operation not permitted.' fault [closed]

I have installed ubuntu and now I want to install flex. It asks for password but when I type my password, it asks me the password for root. When I enter the password which I had specified during ...
1
vote
2answers
19k views

What is my login username and password?

Just loaded Ubuntu Server 12.04.2 and all went well. I rebooted the system and up came Ubuntu login: I tried everything I could think of and pressed Enter. 'Password' appears, but it won't let me ...
1
vote
3answers
2k views

When trying to install Wine on 12.10, 'Sudo' command will not let me type in a password

As the title explains, I have been attempting to install Wine on my laptop which is running 12.10. When I access the command terminal and entered sudo add-apt-repository ppa:ubuntu-wine/ppa I was ...
1
vote
1answer
3k 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
546 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
169 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
2answers
388 views

How to reset mysql root password without logging into mysql?

I want to reset mysql root password but I don't want to log into mysql and then reset the password just as follows, mysql -u root FLUSH PRIVILEGES; SET PASSWORD FOR root@'localhost' = ...
0
votes
1answer
82 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
303 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
votes
0answers
122 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 ...
23
votes
5answers
2k views

How important is the sudo password?

I know that the sudo password protects my computer from being locally hacked by someone having physical access to it (edit : actually, it doesn't). My password is strong enough for that purpose, but I ...
23
votes
2answers
8k 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 ...
26
votes
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?
11
votes
2answers
4k 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 ...
28
votes
1answer
15k 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
2answers
59k 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 ...
12
votes
5answers
61k 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
2answers
391 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 ...
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
1answer
2k 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?
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
0answers
334 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 ...
4
votes
2answers
9k views

How to save VPN passwords with NetworkManger for nmcli?

There are many posts about putting VPN passwords into /etc/NetworkManager/system-connections/<connection>. I can't get any of them working on Ubuntu 12.04. The fields in the questions and ...
18
votes
3answers
965 views

How can I force sudo to always ask for a password after waking from suspend?

Say I execute a command with sudo, then if I use sudo within the next 15/5 minutes (not sure how long it remembers me for) it won't prompt me for a password. It will only prompt me again if I haven't ...
9
votes
1answer
219 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
19k 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
30k 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
2answers
17k 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.