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

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4
votes
4answers
247 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.
1
vote
1answer
196 views

I can authenticate but can not login in using my password?

Here is my story : there were days when I had my password and everything was fine. I removed my password : Opened User accounts Unlocked it by pressing "Unlock" button Selected my username (btw, I ...
2
votes
1answer
1k 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?
0
votes
0answers
91 views

OS and application update behind proxy server

Bear me for posting this question again on this forum. I know that there are many post earlier. I have gone through all of them and tried all nothing worked for me. PROBLEM: I am behind a proxy ...
1
vote
0answers
132 views

ppolicy with pam_ldap - pwdReset has no effect when logging in from Ubuntu

We installed ppolicy overlay on our ldap server. Password policies work correctly for locking out user after X incorrect password attempts, but we can't enforce user to change his password. When we ...
0
votes
0answers
33 views

13.04 sees network and has correct password but states “Auth Req'd”?

Ubuntu sees my network. Wireless doogle and password verified. Have not been able to log on.
5
votes
1answer
891 views

13.04 Packages cannot be Authenticated

I am unable to install updates because the following Packages cannot be authenticated: libudev1 libxml2 libasound2 google-chrome-stable libgudev-1.0-0 libtiff5 linux-image-3.8.0-19-generic ...
3
votes
2answers
6k views

How to use Google Authenticator with OpenVPN server on Ubuntu 12.04

I have a working OpenVPN system on Ubuntu 12.04 and I'd like to add Google Authenticator for extra security. This is my current openvpn config: dev tun proto udp port 1096 ca ubuserv04-ca.crt cert ...
0
votes
1answer
1k views

Nginx Basic Auth and subfolders

I have a problem with subfolders in a basic auth procted folder. In the protected folder i have a folder named phpmyadmin, which contains phpmyadmin. Im not able to run phpmyadmin, when basic is ...
4
votes
2answers
2k 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 ...
1
vote
1answer
3k 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: ...
0
votes
1answer
2k 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 ...
1
vote
0answers
440 views

How to make simple system user authentication work with postfix/dovecot on 12.10?

I have been wrestling on this a LOT. I never properly understood but I presume that authentication by the system users is done with PAM and the default authentication method for both Dovecot and ...
11
votes
3answers
4k 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
87 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 ...
0
votes
0answers
149 views

Why does my browser asks for authentication at every page while connected to a public Wifi?

I have this problem: I try to connect my laptop with Ubuntu 13.04 to a public Wifi. I provided my personal user and password (I entered my user id and password in the first page after connection) but ...
1
vote
3answers
7k 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
0answers
193 views

Unknown module with PAM authentication and IPSec/OpenSwan VPN on 12.10

I have setup a VPN on my home Ubuntu 12.10 server using instructions found here using CHAP authentication: https://raymii.org/s/tutorials/IPSEC_L2TP_vpn_with_Ubuntu_12.10.html I'd like to now change ...
0
votes
0answers
187 views

Authentication needed in turpial everytime I log in

I am looking for a good linux twitter client, and of all the things I tried, I liked turpial the best. Unfortunately, when I used it in 12.10, no matter what I did, I was asked to do the entire ...
0
votes
0answers
27 views

Accessing share without defining host

I've created multiple Samba shares using "net usershare" and they work perfectly. The only question is that the user connecting to the share has to use one of the following two formats to log in ...
0
votes
0answers
49 views

Authentication window in GNOME disappears before I have a chance to type in the password

Sporting 12.10 with Gnome Shell. When I start graphical Software updater manager, and click "Install now", I got "Authentication Required" window prompt as per usual. However, after I've typed couple ...
0
votes
2answers
200 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
1answer
333 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 ...
0
votes
0answers
220 views

How can I disable/change the admin password?

I recently started using Ubuntu 12.10. I was trying to install drivers for a printer I just obtained and I wanted my laptop to look like it was suspended, so I set the When lid is closed option to Do ...
0
votes
0answers
12 views

Still can't recover/change password in Ubunti 12.04 [duplicate]

I, like others, set my password to "None" thinking that I would be able to log in without having to enter a password every time. Now I can't log in as Admin. to load apps, etc. I have tried the ...
1
vote
1answer
492 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
0answers
1k 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
688 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 ...
3
votes
1answer
534 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
814 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
2k 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
92 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
621 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
226 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 ...
1
vote
0answers
286 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
454 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
703 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
3k 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
364 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
175 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
160 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
251 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 ...
3
votes
0answers
99 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 ...
1
vote
2answers
548 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
96 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
231 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
464 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
192 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 ...