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

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1answer
24 views

Can't ssh without password to some machines, on a shared filesystem on a cluster, while it is successful on other machines

I am running on a cluster, where my home directory is shared to all machines. Some of the machines are RHEL and the others are Ubuntu. When I login without password from RHEL->RHEL or UBUNTU->RHEL it ...
1
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1answer
19 views

Packages cannot be authenticated

Anytime I install a new package i get the following error: WARNING: The following packages cannot be authenticated! I can still install the package despite this error, but is there a way to get rid ...
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0answers
35 views

client authentication via sssd/ldap

I'm struggling with an annoying server (14.04.03) setup. We basically want to enable users login via sssd/LDAP, so they can access the machine with ssh. I've followed various tutorials (e.g. ...
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0answers
11 views

Fingerprint reader authenticates but does not close dialog box

I have a T550 which sports the following reader: Bus 002 Device 016: ID 138a:0017 Validity Sensors, Inc. After plenty of tweaking around I managed to get it to work. I managed to register my ...
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0answers
29 views

How to update repo on proxy with lubuntu

Actually i want to update my repo in my school, but it can't connect because the proxy server. Actually there is a authentication in proxy, it require student email and password. Is there someone who ...
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0answers
97 views

Error of packages autentication while updating from Ubuntu 14.04 to 15.04 [duplicate]

I am trying to update my Ubuntu 14.04 to it's lastest version 15.04 but during the process I get the error "It was not possible to authenticate some packages. This may be due to a transient network ...
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0answers
28 views

Problems with wifi connection (after going from 12.04 to 14.04 LTS)

the last problem I cannot get rid of after looking here is the wifi failing to authentication to my fritzbox on a regular basis. in ~ 2/3rd of the attempts, regardless if freshly booted or awaked from ...
1
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1answer
71 views

Internal Server Error (HTTP 500) when issuing an authentication token for OpenStack's demo user

Trying to install OpenStack on a VM (host Win10, guest UbuntuServer14.04.3) I'm following the installation guide (http://docs.openstack.org/liberty/install-guide-ubuntu). When trying to issue the ...
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0answers
14 views

First Time Ubuntu user, problem authenticating app download

I am new to ubuntu... as in just installed it a little bit ago. I no nothing about ubuntu but thought it would be a fun thing to explore a new operating system. I got it installed ok and was ...
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0answers
46 views

org.freedesktop.accounts.change-own-user-data asks me for password

I'm on Ubuntu 15.10. with multiple users configured. Each time I switch to another user and come back to my account, I have a prompt windows asking me to enter my password. Sometimes it works, ...
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0answers
41 views

“System Program Problem Detected” at login

I keep getting the system report of system programs: the action is com.ubuntu.apport.apport-gtk-root. Why is this happening? Should I authenticate it? I haven't allowed it since I'm not sure what ...
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0answers
45 views

Why is “authentication” not working with my user login password?

I'm trying to install Steam. I've downloaded it then right click the folder and hit "Open with Software Center". When I attempt to install, it asks for a password to authenticate. So I typed in my ...
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2answers
27 views

What password do you use when your installing or delleting app? [duplicate]

When I attempt to install software, I am prompted for a password. What is this password? Software to be installed Password Prompt
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0answers
65 views

kerberos passwd: Authentication token manipulation error

(note - ignore the upgrade 15.10 bit, see "more info", below) I've just upgraded to Ubuntu 15.10 using the Live CD over an existing 14.04 version. Users that were configured before were lost from ...
0
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0answers
12 views

How to make Apache2 login using PAM and access files using file system permissions?

I've searched & Googled for hours but haven't found recent solutions (re: PAM, mod_auth_pam or something ... is obsolete). I want users to login using their ubuntu usernames and password, so I'm ...
1
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1answer
204 views

Radius Ignoring request to authentication address

Radius only works if i use localhost i can't use its ip address. Output of: radtest user password localhost 1812 testing123 Sending Access-Request of id 251 to 127.0.0.1 port 1812 User-Name = ...
0
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0answers
24 views

Authenticated OpenVPN before User Authentication

Is it possible to prompt the user for OpenVPN credentials before they are required to login? Our problem is that the ubuntu laptops we distribute use LDAP for authentication, but since our LDAP is ...
0
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0answers
21 views

Sudo: chronic authentication failure on X operations

Sudo works fine from the command-line, but I've never been able to get authentication to work right when a GUI asks for it. Starting X apps from the command-line w/sudo sort of works, but causes weird ...
1
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1answer
59 views

How to fix sudo due to pam error

The short story is that I can SSH into my device with the a username and password that should be in the superuser group (so I should be able to sudo su). The problem is that I was trying to increase ...
5
votes
2answers
174 views

putty key -> connection refused (permissions OK, /var/log/auth.log is empty)

I already checked here: Trying to do ssh authentication with key files: server refused our key and I did all these: *new: generated key(s) via ssh-gen in a Linux client. added the public key to ...
0
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0answers
26 views

How can I debug /etc/ldap.conf mapping?

I'm trying to configure an ldap client. I'm almost successfull (LDAP server is answering requests) but: In the /etc/ldap.conf, mapping configuration seems to be broken map passwd uid login map ...
1
vote
1answer
168 views

How to connect to sftp in filezilla using private key

I've downloaded filezilla on Ubuntu 14.04 using the package manager (apt-get) and I'm currently setting up a site to transfer files for on the remote server I'm using. For the login type, I need to ...
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0answers
22 views

Random Requests for Authentication

I have an unusual problem on my system which I don't seem to be able to find much information about anywhere. When I log into my account, switch to another account or the global login screen, and then ...
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0answers
27 views

How to use a proxy that requires authorization without exposing credentials (username and password)

There are knows ways to setup internet and system updates access through a proxy by setting the environment variables (http_proxy=) and/or updates' config options (like Acquire::Http::Proxy). There ...
0
votes
1answer
29 views

Clients and a server connection by SSH with authentication key usage

What is the way to share a server's SSH key to clients to allow them connect by SSH to that server? In the every manual about SSH authentication a connection between clients and server through ...
0
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1answer
39 views

set up two factor authentication with Google but only if a public key is not used

I have key setup from host1 to host2 and host2 to host1 for SSH. I want to setup two factor authentication with Google on host1 and host2 but only if the incoming connection is from another place. So, ...
0
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1answer
70 views

Can't connect to ubuntu 14.04 from android using ssh

I have a laptop, a desktop and an android phone(Moto G) connected to the same wifi network at home. I had installed openssh-server on my laptop and desktop and could connect between them using ssh. I ...
4
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0answers
22 views

Cannot install app from Software Center - Requires installation of untrusted packages [duplicate]

So, I've purchased an app from Ubuntu Software Center. The problem is that I cannot install it. Whenever I try to click Install this appears: Requires installation of untrusted packages ...
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0answers
19 views

Apache Authentication

I configured the authentication on Apache2 with .htaccess and .htpasswd files. Now my problem is that when I close the browser or the browser tab, remain logged in without me being prompted for ...
2
votes
1answer
31 views

how to check what incorrect password as attempted

In /var/logs/auth.log I can see the unsuccessful login attempts. They are like lines below: Oct 16 05:04:02 myMachine unix_chkpwd[15793]: password check failed for user (user1). Now is there a way ...
0
votes
1answer
49 views

Ubuntu keeps asking me for Gmail passworld

I'm using Ubuntu 15 and everything was fine till i decided to use evolution. Evolution failed to connect to Gmail and since then it asks me to enter my password for my Google account. according to ...
3
votes
0answers
119 views

Remove the “Authentication is required for …”

I'm terribly sorry if this has been answered somewhere else but I've read through many forum posts and still haven't found a fix to my issue. Recently installed Ubuntu 12.04 then updated to 14.04 ...
2
votes
1answer
47 views

amount of attempts Authentication password

Is there an amount of attempts when I forget the authentication password? Like Iphone or something when after 3 times the phone is locked for 30 sec, and after that for 5 minutes (and so on..)? I ...
0
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0answers
27 views

Authentification problems in Ubuntu 14.04 [duplicate]

My admin password is not accepted. All the solutions given in similar posts require to enter a password at some point, but in my case it is never accepted. Caps lock is not on, it just doesn't work. I ...
2
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0answers
65 views

In Ubuntu 14.04, password works for system login but nothing else

TOTAL noob here, having installed Ubuntu 14.04 on my laptop (with some difficulty, as I have no clue what I'm doing). I set a strong login password that continues to let me log in to my system. I can ...
0
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0answers
67 views

User cannot login using Putty

User1 can login to the Ubuntu 12.04 server using Putty fine. User2 cannot login using Putty and gets access denied. When I login as user2 from the VMware console it logs in fine so the password is ...
0
votes
1answer
38 views

How to prevent loggin in via ssh as my domestic user?

Hi i am kind of a newb in ssh but i setup a domestic server in a laptop. I have a user called e.g. USERBRUNO with a password authentication required. The problem is that if my friend does ssh ...
1
vote
1answer
91 views

Equivalent Ubuntu network configuration

I have a windows 7 machine (already configured to connect to the LAN) and a Ubuntu 15.04 machine (yet to be configured to connect to the LAN). On Windows 7, the configuration is as follows 802.1x ...
0
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2answers
87 views

Problems with su: Authentication Failure

I am currently using Ubuntu and am 100% new to Unix. I have installed Ubuntu to program in C and will be using the "Learn C the Hard Way" online textbook ...
0
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0answers
68 views

Squid Proxy Server not working using my private dns when in DMZ

I configured a squid proxy server using ntlm-active directory authentication which works fine when deployed in the LAN but when I move it to the DMZ, the authentication fails and hence clients are ...
0
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1answer
38 views

After Installing Ubuntu College LAN not working?

After installing Ubuntu college LAN is not working in Ubuntu but still working with windows 10. College LAN uses IEEE 802.1x authentication by username and password but not working on Ubuntu?
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0answers
192 views

Possible security issue? (syslog connect messages)

I was just looking through my syslog and noticed theese lines repeating over and over almost endlessly: Aug 25 16:52:56 xxx-xxx-xxx-xxx postfix/smtpd[9572]: connect from ...
0
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1answer
240 views

`sudo`, `gksu` and `gksudo` without password

In Fedora, I am surprised that if my administrator account does not have a password, sudo, gksu and gksudo won't prompt me for one! (it is not caused by /etc/sudoers). In Ubuntu, they will ask me for ...
0
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0answers
16 views

Trying to download updates can't remember password [duplicate]

I am new to Ubuntu 14.04 LTS and having problems downloading updates to the system. Every time the system prompts to the software repository setting authentication it prompts for a password. Now I ...
0
votes
1answer
47 views

Why does the Software Updater allow me to update the package list without authentication unlike in Terminal? [duplicate]

I have found recently that when running the Software Updater GUI it automatically, without asking for authentication, updates the local package list, but when running the equivalent in Terminal ...
0
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0answers
109 views

APT-GET behind a proxy with DIGEST Authentication

I've edited apt.conf, applied "system wide configuration", edited /etc/enviroment, etc... but out of luck. My company is running a Squid proxy with DIGEST authentcation, which I think APT doesn't ...
0
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0answers
72 views

About Mail `Authentication Request`?

I've installed Evolution, after that I've opened it, from that on-wards still I'm getting the mail Authentication Request as given below, I've uninstalled Evolution though,still at each time of ...
0
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0answers
58 views

KDE “Authentication Errors”

I am having trouble using package managers on KDE. I have both Muon Package Manager and Apper installed, but both fail to ask for a password and give the error that I have "not authenticated". I have ...
0
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0answers
39 views

Ubuntu Server Network Authentication

I have a dual boot system. When I boot into Windows and I open Internet Explorer, I am asked for my user name and password credentials. Once I do that, I am granted access to the internet. When I ...
0
votes
1answer
38 views

Authentication failure in Hadoop

I have already installed Hadoop and already added user as hduser to group, but I have forgotten the password of the user i.e. hduser. When running su hduser from the terminal I get the result: su: ...