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

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0
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0answers
150 views

Password popup on USB unplug/replug “Authentication is required to change your own user data”

After upgrading from 14.04 to 14.10 when I unplug and re-plug a USB mouse (or switch keyboard/monitor/mouse with a KVM switch.) an authentication popup dialog appears asking for my password saying ...
0
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0answers
319 views

How to authenticate users via PAM using freeradius?

I have like 20 users in server2, and I need to configure PAM on server1 to authenticate users against /etc/passwd file using freeradius which is configured on server2 with a shared secret ...
0
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0answers
32 views

Conditional authentication

I want to use the following authentication in Linux: If during the boot flash drive is connected, the logon to the operating system is performed by the user "user1", in this case should be carried out ...
0
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0answers
41 views

Disable authentication password

I forgot my authentication password for downloads. So now want to remove it all together I haven't trying any command yet
1
vote
1answer
74 views

Authentication failure

I'm using ubuntu 3.13.0-24-generic. I know root password and login before (my friend can use su command), root password not change but when i using su command it appear " authentication failure", What ...
0
votes
0answers
147 views

Dovecot user login failed

I have a problem with my dovecot. I want to make a mail server using postfix, dovecot, thunderbrid and outlook for windows users. But when I install and configure dovecot, I can't login with my mail ...
5
votes
1answer
3k views

Could not load host key: /etc/ssh/ssh_host_ed25519_key in /var/log/auth.log

I have an Ubuntu 14.04 instance running on AWS. I was browsing the auth logs (/var/log/auth.log*), and noticed the following line appearing: Could not load host key: /etc/ssh/ssh_host_ed25519_key ...
0
votes
1answer
154 views

Can a user with ssh keys set their own password after logging in with keys without knowing their password?

I'm playing around with a script to create a user across a number of machines. I'd like to not know the users password at any time, but having the public SSH keys is quite acceptable to me. The user ...
0
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0answers
16 views

Can I disable other users authenticating while on my account?

So I have not realized this feature until recently after adding another admin to my computer and I realized when updating that either of the admins can authorize the update while logged into my ...
0
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0answers
152 views

Free Radius User Authentication

I have a question regarding Freeradius.As of right now I this is a sample of how my users are set up /etc/freeradius/users Test Cleartext-Password := "test123" Service-Type = ...
1
vote
0answers
333 views

Can someone help me escape Skype and use Ekiga?

I really want to escape from Skype because its Linux support is abysmal and its ethics questionable. The most prominent alternative seems to be Ekiga, but I just can't get it working. Could someone ...
1
vote
1answer
294 views

Can't log in from terminal

I have a server with a hosting provider (OVH). I've never had any trouble logging in via SSH, but I use RSA authentication, so I'm not sure if I could actually get in with a password. However, when ...
5
votes
1answer
3k views

how to setup two factor authentication in Ubuntu for Ubuntu users using Google authenticator?

How to setup two factor authentication in Ubuntu for Ubuntu users using Google authenticator (It can also be setup for non Google accounts)?
1
vote
1answer
210 views

Dovecot IMAP (port 143) not working with SASL while Postfix (port 25) is

I've got SASLAuthd working (via LDAP), and am also successfully able to telnet via port 25 with my LDAP credentials. Postfix is configured with Dovecot. All 3 services are running fine (Postfix, ...
1
vote
1answer
392 views

Ubuntu Phone (Aquaris 4.5) How to connect to a wifi network wich requires an account?

So I tried to login to the WiFi network at my University, which requires an account and password, but I never came that far. Whenever I select one of the networks (there are 2 usable networks) it ...
1
vote
1answer
263 views

After moving home directory, ssh configuration is not working

I moved my home directory from /home/user to /media/newDrive/home/user. Everything seems to be working at first, except my ssh configuration. I was able to log into this machine from my laptop with ...
0
votes
1answer
205 views

Using wget to download websites when logged in to a password protected session

I am having difficulty downloading websites with wget that require specific authentication. Specifically, my university has me login to my account to be able to access university related websites. I ...
1
vote
0answers
326 views

Authentication not working properly after using fingerprint authentication in Ububtu 14.04

I installed fingerprint-gui to use fingerprint scanner in my thinkpad. The commands used were sudo apt-add-repository ppa:fingerprint/fingerprint-gui && sudo apt-get update sudo ...
1
vote
3answers
686 views

Multiple Users Private / Public Keys

I am currently undergoing a project of maintaining a server with certain simple services (mail, web) for a group of thirty users. I would like to use pub/private keys but I guess unsure of their use. ...
0
votes
1answer
152 views

can't authenticate for wifi n access

Beginning about two weeks ago, perhaps owing to a software update, Network Manager has been unable to authenticate successfully on N type WiFi networks, but continues to work with other network types. ...
0
votes
2answers
230 views

All sites fail with 401 unauthorized

I have Ubuntu 14.04 LTS and until yesterday everything was fine. Today I cannot access any site (no matter which browser I use). If I start Firefox, it wants to go to: start.ubuntu.com and I get a ...
3
votes
0answers
525 views

Samba keeps warning 'Session closed for user nobody'. Why?

I've set up an Ubuntu 14.04 server, using Samba to share files to our Windows clients. Everything appears to be working correctly, but while checking my auth logs, I see the line 'session closed for ...
0
votes
1answer
1k views

Unable to use RSA keys with SSH: Server refused our key

I am trying to use RSA public/private keys generated by PuTTY to log in to two GNU/Linux computers from Windows computers, and it works for one but not for the Ubuntu computer. The keys were generated ...
0
votes
1answer
350 views

Use Google Open ID to automatically create accounts/login to Ubuntu

What I'd love to be able to do is to have the ability to use Google's Open ID system to have users automatically authenticate with Ubuntu. Yes, it would be Chromium OS-like in its login but there are ...
-1
votes
1answer
413 views

Using `System.DirectoryServices` on Ubuntu to authenticate with windows active directory

I have developed c# application using monodevelop, which basically does ldap authentication with windows active directory. And works fine in windows environment. but if i use the same code in the ...
0
votes
1answer
284 views

Wifi connection deauthenticated by router

I use ubuntu 14.04 and I have an Acer V3-571G laptop. I have an O2 Box 6431 modem which I have received from O2. My wifi connection works fine except when I restart ubuntu or laptop. Next time it does ...
1
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0answers
1k views

What is the correct way to modify /etc/pam.d/common-auth?

By default /etc/pam.d/common-auth looks like this $ cat /etc/pam.d/common-auth # # /etc/pam.d/common-auth - authentication settings common to all services # # This file is included from other ...
0
votes
1answer
140 views

Why isn't my apache authentication working?

I am trying to set up apache2 authentication for a given website which can be found locally on my webserver. When I try to open up the website it states Internal Server Error 500. Then I put the ...
0
votes
1answer
392 views

How can I use my Active Directory credentials to log in to my Linux machine?

I would like to use the same username/password to log in to my Linux machine as I do for a Windows machine that authenticates against Active Directory. In particular, what I want is: When I log in ...
2
votes
0answers
383 views

How do we implement requirements of password policy?

This question might look similar but I could not find a solution to this which covers all the below requirements of the policy, Hence please help me: - Incorrect pass lockout (after 3 incorrect ...
0
votes
1answer
7k views

Home directory permissions preventing ssh key authentication on Ubuntu Server 14.10

I have ubuntu server 14.10 with an SSH server on it, and have password authentication working fine from my System76 darter laptop running Debian Sid. I want to switch to rsa-key authentication. On ...
2
votes
1answer
659 views

Check which SSH key was used to login

So stupidly enough in our development team every individual SSH Key is used to access the root user directly. When Checking the auth.log I can find this Dec 18 09:45:04 webserver sshd[12377]: ...
0
votes
2answers
43 views

Accessing the computer [duplicate]

I have my son's laptop. He passed away this year and I am trying to access his computer. I dob't have the password or the email address he used. It is asking me for an authentication code when i ...
0
votes
3answers
227 views

how to run as administrator ubuntu 14.04 and not as guest?

today I installed ubuntu 14.04 and also a new user to the new operating sysytem. there are several problems I am facing with it they are: 1.I cant log in as administrator but as guest,can you help me ...
1
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0answers
85 views

Can login via ssh, but not system tty

Here's something weird. I can: ssh xyz@localhost provide my password, and login as xyz. However, I if hit ctrl-alt-F3 to go to the system prompt, and try to login as the same user xyz I get a ...
0
votes
1answer
2k views

ssh connection fails with and without rsa keys

I've got a machine running Ubuntu in the office.I've got a machine running Mint at home. My goal is to be able to work from home connecting to the office with ssh. I swear i tried to look for similar ...
7
votes
4answers
3k views

Stop asking for authentication to mount USB stick

My Ubuntu 14.04 is asking for my password to mount or unmount an USB stick. How can I change it, so that the mount is automatic and no password input is required ? This is about mounting arbitrary ...
2
votes
0answers
1k views

Can't authenticate against LDAP. /etc/nsswitch.conf seems to be ignored

Running ubuntu 14.0.4.1 on a BananaPi (ARM). I've had a lot of luck getting LDAP authentication to work under 14.0.4 on x86, but something about this just isn't working. If you run getent passwd | ...
4
votes
2answers
5k views

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

I'm trying to install flash via the software center and I get this error : "Software can't be installed or removed because the authentication service is not available. ...
0
votes
2answers
144 views

How to use microsoft isa proxy with authentication on ubuntu 14.04 64-bit

my apt.conf file: Acquire::http::proxy "http://user:password@server:port/"; Acquire::https::proxy "https://user:password@server:port/"; Acquire::ftp::proxy "ftp://user:password@server:port/"; ...
0
votes
2answers
758 views

Change default user for authentication

When I attempt to perform certain actions within ubuntu I am asked to authenticate with a root user, but ubuntu doesn't give me options for which root user, it just specifies it as the user that set ...
0
votes
2answers
304 views

rsync + ssh public key asking authentication

After creating the keys and use ssh-copy-id command successfully, I can connect by ssh user@host but when I'm trying to do a transfer via rsync and it asks for password... rsync command is as follows: ...
2
votes
0answers
198 views

lubuntu completely ignoring ldap setup. Followed guide, no contact with ldap server

We have LDAP authentication working on every other server and lxc container in our enterprise, but when we try and have a brand spankin new Lubuntu 14.04 installation do the same, it's completely ...
1
vote
1answer
408 views

Connecting 14.04 to Windows 8.1

I have a machine with 14.04 and a Windows 8.1. They are connected to a gigabit router. Both are connected to a VPN. The Windows machine is able to see the Linux machine and copy files to it. The ...
-1
votes
3answers
586 views

How access openssh-server with external IP address from outside the Local Area Network

How can I use my new openssh-server with the external IP address from outside the Local Area Network? The purpose is that an external computer administrator from outside the Local Area Network should ...
0
votes
1answer
398 views

pg_dump won't run through PHP

This question has been addressed in various other posts but they don't seem to help me out. My issue is that I run the following script: $strBK = '/usr/bin/pg_dump --host localhost --port 5432 ...
0
votes
1answer
706 views

How can I install Railo and Apache on Ubuntu and have it pass a basic Authentication username to Railo?

I'm trying to move from using Adobe ColdFusion to using Railo. The Application I'm trying to migrate relies on having the webserver check basic authentication, but then needs to know the authenticated ...
2
votes
0answers
54 views

Validate password against regular expression?

Is it possible to somehow set a regular expression that would validate a user's password? So that if the regexp is set to: ^qwerty|йцуке$ than both qwerty and йцуке will be valid passwords. I want ...
-1
votes
1answer
106 views

AUTHENTICATION PASSWORD UNKNOWN [duplicate]

I have ubuntu 12.04 LTS and I do not know my authentication password due to which i cannot install any software. Its urgent. Please tell me a solution and not a suggestion. In case , if I have set the ...
1
vote
0answers
94 views

Installing Google 2 step Authentication causes SSH to not connect

I am following the instructions here https://www.digitalocean.com/community/tutorials/how-to-protect-ssh-with-two-factor-authentication After making the changes listed to /etc/pam.d/sshd and ...