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

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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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18 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 ...
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1answer
48 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 ...
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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 ...
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1answer
33 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 ...
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20 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 ...
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23 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 ...
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12 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 ...
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17 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 ...
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19 views

Require Install untrusted packages

My brother has put a password on installing untrusted packages and i cant install adobe flash player on my linux. Is there any other way than putting the password for installing untrusted packages.
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1answer
17 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: ...
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16 views

Change password on Ubuntu client using LDAP Authentication

I've setup a computer lab running Ubuntu 14 clients and an Ubuntu 14 server. The clients are successfully logging in using credentials provided by Open LDAP. I used this guide to configure the ...
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26 views

Prevent multiple login in squid authentication

I am using a php script that read a sql database to authenticate squid3 proxy users on a ubuntu server 14.04. However it allows multiple simultaneous logins with the same username and password from ...
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0answers
21 views

14.04 samba-winbind pam_mkhomedir.so home directory ownership

After joining ubuntu 14.04 to our Active-Directory Domain using samba-winbind pam_mkhomedir creates home, but ~/.config and other directories are owned by root, preventing graphical login. Please ...
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16 views

unable to install ubuntu software due to proxy authentication error in 14.04

Unable to install vlc via command sudo apt_get install vlc it shows error 407 proxy authentication required
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74 views

Something wrong in 14.04 LTS with ssh when no password is authorized by remote server

After loosing days for a solution (including here), I will ask more expert people about a way to connect a new desktop ubuntu 14.04.LTS to some ubuntu 14.04 LTS servers accessible only by using a ...
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22 views

How to check if a switch is configured in 'ssh' or in 'telnet' using perl script provided the switch IP is available…?

In a perl script, when a switch IP is available, it is required to know if the switch is configured for 'ssh' or 'telnet' for continuing execution. How can this be done..? Please help it...
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55 views

FreeIPA equivalent for Ubuntu Server 14.04

For my small business I have a primary work server (Dell T320) running Ubuntu 14.04. This is my host OS for the KVM Visualization platform - which in turn runs a virtual Firewall, an MS Server 2012R2 ...
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54 views

after modifying the olcDatabase={1}hdb getting error “this base cannot be created by PLA”

This is the actual configuration file for the olcDatabase={1}hdb. # AUTO-GENERATED FILE - DO NOT EDIT!! Use ldapmodify. # CRC32 be185314 dn: olcDatabase={1}hdb objectClass: olcDatabaseConfig ...
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25 views

ssh not authenticating to kerberos

I am using my single PC as a ssh-client,ssh-server,kdc,admin-server. I am not using any of the virtual machines for this kerberos lab. I am connected to wife get the ip of 192.168.1.224 but i am using ...
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12 views

google authentication error

I have added google authenticator plugin on gerrit server, but when i am trying to login using google oauth provider plugin it is showing "redirect_uri_mismatch" error, i have registered my ...
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33 views

Cannot run install.sh file in Ubuntu 12.04 terminal

I have inherited a Dell Inspiron with Ubuntu 12.04 installed. There is no working wifi so I have purchased a wifi adaptor and extracted the driver and install .sh file on to my pc. I used properties ...
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1answer
39 views

SSH-Login with key does not work correctly

I got a system where I want to get access via ssh-keys to. I created an user called monitor and created a file called authorized_keys in /home/monitor/.ssh/ and inserted 2 public keys: Publickey #1 ...
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1answer
36 views

Cant authenticate via GUI

I can not authenticate anything that requires GUI authentication...like approve software updates. After each try it says something like authentication was unsuccessful, and closes the dialog after 3 ...
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41 views

Can't SSH with Key Authentication

I created an RSA keypair using ssh-keygen on Ubuntu Desktop 14.04.2 LTS ssh-keygen -b 2048 -t rsa -f ~/.ssh/<keyname> -o Than I added the public key to the remote Ubuntu Server 14.04.2 LTS ...
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69 views

Two factor authentication with password and USB Device for PostgreSQL server

I'm going to setup 2 factor authentication for my database server. I'm using PostgreSQL 9.4 DBMS on Ubuntu 14.10. I need to force two authentication methods for my database server. The authentication ...
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0answers
48 views

Why do I have to set usePAM to 'no' to manage a ssh connection?

I have a system user named user1 (the main one). I've tried to set a ssh connection between a user named foreignuser and the main one (user1). For that, I've generated a couple of keys with ...
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39 views

“Authentication is required to check power state for…” after login from encrypted user

One of the users on my system (Ubuntu 14.04) has an encrypted home directory... after I log out of the encrypted user and log into another unencrypted user, I am getting a series of window asking me ...
2
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1answer
54 views

Add SSH key when only public key authentication is available?

This question is more of a general Linux or OpenSSH question than it is specific to Ubuntu but because I'm setting up an Ubuntu server, I'm asking it here. The organization I work for is built on an ...
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1answer
21 views

Running Ubuntu 14.04 and recently can't download from software center

Download from software center not possible and got this message " authentication error" I have tried all suggestions but still not fixed yet, I was wonder if anybody can help me out.
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1answer
260 views

proxy authentication error in using app-ppa-repository after exporting proxy settings in ubuntu 15.04

i am trying to add repositories through the terminal after exporting proxy settings. export http_proxy="http://username:password@proxy":"port" export ...
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60 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 ...
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79 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 ...
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22 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 ...
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22 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
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1answer
33 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 ...
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40 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 ...
3
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1answer
376 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 ...
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1answer
49 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 ...
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12 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 ...
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81 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 = ...
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100 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
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1answer
86 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 ...
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1answer
381 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)?
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220 views

Blocking Specific User to specific website using Squid Web Proxy Webmin

I'm using Squid Web Proxy via Webmin and currently it works. I have set the proxy authentication too. source : ...
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1answer
118 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
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1answer
239 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 ...
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10 views

**PLEASE** Help with Password Recovery / “Authentication token manipulation error” / keyboard won't type [duplicate]

I am really hoping that someone can help me with Password Recovery. A couple weeks ago my doctor found a 6 cm tumor in my head and had a surgeon remove it asap. Good news, it's benign so I get to ...
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62 views

Ubuntu LDAP authentication

Need to know if i'm on right path. Trying to use LDAP authentication for Web user access of network resource. I have configured LDAP server and client_auth (ldap-auth-client) demon on Ubuntu ...
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85 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 ...