Questions about authenticating wireless connections, SSH keys, or passwords in Ubuntu.

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5
votes
2answers
3k views

OpenSSH Two Factor Authentication

I'm using Ubuntu Server 13.04 and want to use OpenSSH for sftp. I have everything set up and the only thing not working is the Two Factor Authentication. Currently it asks for a password or the public ...
2
votes
2answers
5k views

Authentication in wireless network

I am authenticating a network using WPA2, but not working (authenticates then off) OS: Ubuntu 13.04 Wireless network card : Intel Corporation Ultimate N WiFi Link 5300 $dmesg: [ 1248.966666] wlan0: ...
1
vote
1answer
4k views

NIS client authentication

How to configure the nis client on Ubuntu? And how to configure system authentication? There is no option for system authentication like system setting system info in my system etc. When ever I go to ...
11
votes
3answers
5k views

Security warning from Facebook in Chromium

I am terrified. Every ten minutes Chromium pops up with a tab stating: Success SECURITY WARNING: Please treat the URL above as you would your password and do not share it with anyone. Very ...
1
vote
1answer
94 views

Difficult Problem - I'll Try To Explain [duplicate]

OK, so my husband and I have had Ubuntu 13.04 I believe for about a week now, or whenever they released it. Yesterday, turn on the computer and his "user" and everything with it, was gone. Mine, still ...
1
vote
3answers
14k 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 ...
0
votes
2answers
276 views

Authentication required for every 1 hour for Internet but NO proxy. How do I get out from this problem?

OS: Ubuntu 12.04 and/or above My system connected to University campus Internet which has no proxy. But needs authentication (username and password) for every 1 hour. If the web-browser is running ...
1
vote
2answers
673 views

apt authentication failure on self-signed package

I did create a gpg key using "gpg --gen-key", here is the listing: > gpg --list-keys /home/<user>/.gnupg/pubring.gpg -------------------------------- pub 2048R/99EDE0B7 2013-02-05 uid ...
1
vote
1answer
881 views

Authentication required to install plug-ins and application [duplicate]

I cannot install new plug in to my linux computer. It keeps asking authentication required that needs a password. I do not know what the password is. Pls help me identify the problem or remove the ...
1
vote
1answer
2k views

Apt behind proxy

I've been trying to get a package manager to work behind our company proxy for a whole day now but without any luck. The proxy requires authentication which is my personal email address and password. ...
2
votes
1answer
1k views

ubuntu 11.10 /var/log/auth.log

I use Ubuntu 11.10. And I want it to write logging messages about failed ssh log in attempts to /var/log/auth.log. In my understanding /var/log/auth.log is supposed to hold all failed ssh connection ...
5
votes
1answer
1k views

Login on local terminal without password

I have a virtual guest of Ubuntu on a KVM Machine, I've setup the machine so I can type virsh console and be dropped into a console. I realise the security considerations here, but is it possible to ...
1
vote
1answer
2k views

Authentication issue after Wubi installation

I am unable to log-in to Ubuntu with the username/password combination I gave on Wubi at the time of installation (incorrect username/password error). This happened twice; the first time I really ...
3
votes
2answers
4k views

Authentication failed with the correct password and now I cannot use sudo anymore

Recently I installed Ubuntu 12.04 (first time on Ubuntu). I have my normal "administrator", and another Guest account. I was experimenting today with the user accounts, and set my "administrator" ...
0
votes
0answers
14 views

How do I authenticate over a domain while doing apt-get update? [duplicate]

I am getting various 401 auth errors when trying to sudo apt-get update. I am connected to my corp vpn and have an SSH into my Ubuntu machine. How can I authenticate using my network login/pw to ...
4
votes
1answer
103 views

How can clients authenticate to a proxy without user intervention?

I would like to set up a number of computers that need to go through a proxy server to get to the outside world. The OS is Ubuntu 12.04 but the issue seems common to all versions (are far as I can ...
5
votes
2answers
1k views

Is there a way to save username and password for print authentication?

I saw this this question and followed its answer, but the problem persists for me. Once I send a document to print, this dialog box (in figure) opens up and shows "Held for authentication". Then I ...
1
vote
1answer
425 views

Directory path for home to an external NTFS hard drive

OK, I have run into a problem with authentication and I think I have figured out the problem but i cant seem to find the solution anywhere I look. I am using Ubuntu 12.04 running Lamp (individually ...
2
votes
0answers
330 views

Atheros ar9285 can't connect to specific AP

My laptop (asus UL80J) has Atheros AR9285. the ubuntu is 12.10 -64 bit the problem is my wirless adopter work good with all AP that I have except one I tried: dmesg |grep wlan And it gave me ...
2
votes
2answers
728 views

gksu not working in menu mode but works in cli mode

I'm running 12.04, latest updates. when I use gksu in the menu to start a application the prompt for password doesn't appear and the application starts with user priviledges. If I use gksu from ...
0
votes
1answer
2k views

i cant remember my password [duplicate]

my computer goes on standby every 5mins and will then request for an authentication password; i cant remember setting any password. so i will have to restart the computer again before i can use it. ...
0
votes
2answers
5k views

Why do I get “Authentication Failure”? [duplicate]

I recently installed Ubuntu 12.10. As i started the terminal and ran the command su which we usually use to perform root operations and to get the # symbol. After running the command it asks me to ...
2
votes
1answer
462 views

Suddenly, I Can't login with correct password (greeter & tty)

This might be a duplicate of other password related questions but it's somehow eccentric. I have three accounts in my Ubuntu 12.10 system (one standard and two administrators). One of the ...
1
vote
1answer
378 views

“Permission denied (publickey).” error when trying to ssh into server

I am trying to connect to a server via SSH. I am getting the following log from using the command: ssh -vvvT ubuntu@ec2-176-34-121-133.eu-west-1.compute.amazonaws.com. Please could someone help me ...
0
votes
1answer
307 views

Log file size or age

I'd like to change various log files (particularly auth.log) to retain info for anywhere from the last 30-90 days. Right now it only has about 4 days worth of info. How do I modify these settings ...
2
votes
2answers
1k views

'The Authentication failed' error in Ubuntu One using 12.04

I had a computer with 12.04 that Ubuntu One was working seamlessly. But I had to reinstall it in another computer (a brand new computer I've received at work). Since then Ubuntu One is not ...
0
votes
1answer
255 views

Can't install Ubuntu 12.10 from USB

I can't install Ubuntu 12.10 from USB drive. I tried LiLi, UNetBootin, Universal usb installer and others for create USB. It boots and I can select "Try Ubuntu without installing" and "Install Ubuntu ...
4
votes
0answers
106 views

Ubuntu One oAuth token - time of life

I try to develop some Java application that works with Ubuntu One account. Everything is ok, I have access to my U1 space but I'm not sure of one thing. How long may I use my oAuth token? Has it some ...
2
votes
2answers
3k views

Graphical authentication works; why does sudo say my password is wrong?

I'm trying to install a theme, and when I enter the command sudo cp -r $HOME/Desktop/Overglossed /usr/share/themes the terminal asked for my sudo password which I entered, however I'm told my password ...
1
vote
2answers
148 views

I get this message when I try to install software in the Software Center Ubuntu 12.10. No fixes I saw here helped

Software can't be installed or removed because the authentication service is not available. (org.freedesktop.PolicyKit.Error.Failed: ('system-bus-name', {'name': ':1.168'}): ...
0
votes
1answer
367 views

Can not authenticate in Gnome to install packages

I can not install anything through 'Ubuntu Software Center'. The system refuse to accept the su password that it accepts in terminal. It might be relevant that I've had change the user's password a ...
1
vote
0answers
467 views

Incomplete system-wide proxy settings on Ubuntu 12.10 [duplicate]

Possible Duplicate: Where are the system-wide proxy server settings? The new: System Settings>Network>Network proxy does not allow me to configure the user and password for my proxy, and ...
3
votes
0answers
213 views

Authentication problem-I can't enable my wireless driver

I have just installed Ubuntu 12.10 after trying it on a usb stick which worked fairly well. But currently I am not able to install anything because every time I want to do something I'm prompted to ...
0
votes
1answer
3k views

Finger print driver for Dell Vostro 3460

Where do i get the driver for finger print recognition for Dell Vostro 3460 and how can I use my fingerprint reader for login? Fingerprint Reader: Validity Sensors, Inc. VFS5011 Fingerprint Reader ...
0
votes
1answer
1k views

No password set - how do I authenticate? [duplicate]

Possible Duplicate: How do I reset a lost administrative password? I am running Ubuntu 12.10 and have removed the password on my account. When I need to Authenticate, the system doesn't ...
3
votes
2answers
5k views

Retrieve Windows 8 Product Key from mainboard

My new laptop came preinstalled with Windows 8. Naively, as I am, I just formatted the harddrive and installed fine old Ubuntu. Now I want to install Windows 8 for dual boot again, but I have no DVD ...
1
vote
2answers
2k views

Update manager will not update due to authentication error

I press 'Install Updates' and then it will say Requires installation of untrusted packages The action would require the installation of packages from not authenticated sources. then it will ...
4
votes
1answer
117 views

How can I get the authentification dialog programatically?

Instead of using gksudo in a bash script, I want to invoke the authenticate dialog ( as in screenshot) instead. Is it possible? If yes, how? Thanks.
1
vote
1answer
1k views

How to authenticate Squid against a custom backend?

I want to setup a proxy service using squid and want it to authenticate against a database or another service. There is an example config at ...
3
votes
1answer
2k views

What causes “pam_unix … conversation failed” in auth.log

There are thousands of entries in my auth.log like this: sudo: pam_unix(sudo:auth): conversation failed What causes these to occur? I'd like to fix whatever it is but I'm a bit mystified as to ...
3
votes
2answers
1k views

Immediately after login, my 12.04 LTS desktop asks for my password for “Authentication is required to change user data”

I have two Ubuntu 12.04 systems, one a desktop, and the other running as a NIS/NFS server (a desktop with lightdm disabled). When I login, I get the dialog (not error) "Authentication is required to ...
1
vote
1answer
144 views

Can not authenticate form system tools

Whenever I try to run a program from gnome, I get messages like Authenticated is required to run the Gparted Partition Editor The same goes for all programs that need root permission and I try to ...
1
vote
1answer
278 views

I cant login in Ubuntu Server after passwd command [duplicate]

Possible Duplicate: Authentication token manipulation error I installed Ubuntu Server using Oracle VM on my Windows 7 for practicing GNU commands. I used the passwd tool but after using ...
1
vote
2answers
263 views

“Ubuntu One” authentication Failure in Windows 7

I just updated the Ubuntu One client on my Windows 7 machine today. When I try to sign in, I receive the "authentication failed" error message, even though the same credentials work on the Ubuntu One ...
3
votes
4answers
1k views

Can't connect to a remote server with Nautilus and a private key

The remote server requires a private key and passphrase for authentication. I'm trying to connect to the server as root (on that server) from Nautilus running on behalf of my non-root account on my ...
0
votes
1answer
373 views

Use a proxy which connects to the school proxy

How to get my computer use a proxy ON my computer, which connects to the school proxy ? The reason I ask this, is because I need all programs on my computer, absolutely the whole system to go through ...
-2
votes
2answers
2k views

authentication is required to change user data

I set administrator password to blank. Now, I can't install new programs (message see in title), or change the admin password ("change" button grayed out). I tried a suggested fix from inside the ...
2
votes
1answer
3k views

vsftpd any password work for local users

My setup of vsftpd allows for local users to login using their usual passwords and another set of users to login through a passwd file. The problem I have now is that when using a local user's login, ...
1
vote
1answer
51 views

Ubuntu One Installer Win 7 Cannot find My Ubuntu One Account

When I run Ubuntu One installer on Win 7 Home Premium it gets as far as the screen that asks to log in with and existing Ubuntu One account or to create a new Ubuntu One account. When I enter my email ...
16
votes
4answers
21k views

“Software can't be installed or removed because the authentication service is not available. ”

I have 12.10 ubuntu and when I try to remove / install programs I get notification : Software can't be installed or removed because the authentication service is not available. ...