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

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1answer
16 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?
0
votes
0answers
92 views

How to use pamusb to ONLY autologin

Is it possible to configure pamusb to only handle the login authentication? Right now all my authentication can be done with an usb stick, which means sudo and other stuff can be run by any random ...
0
votes
0answers
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 ...
0
votes
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 ...
0
votes
0answers
24 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
votes
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
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 ...
0
votes
0answers
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 ...
17
votes
12answers
69k views

Trying to do ssh authentication with key files: server refused our key

I'm trying to setup ssh authentication with key files in stead of username/password. The client is a Windows box running PuTTY and the server is a Ubuntu 12.04 LTS server. I downloaded puttygen.exe ...
3
votes
2answers
6k 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" ...
5
votes
4answers
8k 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 ...
0
votes
0answers
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 ...
0
votes
0answers
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 ...
1
vote
1answer
182 views

Google authenticator for Galaxy Nexus with Ubuntu Touch

I'm en route to try and install ubuntu touch on my galaxy nexus (GSM-i9250). Since I'm using the google authenticator app in order to access my google account, I'm afraid that I'll be locked out of my ...
-1
votes
0answers
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.
4
votes
4answers
7k views

Wireless Network Found, can't connect, repeated requests for authentication

After trawling through the internet, on forums, support websites, and through dozens upon dozens of answered questions on this site, I've not found a solution to what seems like a fairly regular ...
0
votes
0answers
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 ...
0
votes
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: ...
0
votes
0answers
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 ...
0
votes
2answers
97 views

Installing apps programs etc

Im new to Ubuntu. I'm trying to install apps etc, but it keeps asking for authentication. I don't where or how to create a password. I've had a look in system settings but no joy
2
votes
0answers
22 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 ...
3
votes
2answers
1k 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 ...
0
votes
0answers
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
2
votes
1answer
4k views

authentication required by wifi network ubuntu 14.04

Whenever I connect to my wifi network, this annoying 'authentication required by wifi nework' window pops up, with my wifi password in it. All I have to do is to press the Connect button. Still I ...
0
votes
0answers
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 ...
0
votes
1answer
281 views

maas-cli login always returns 403 Forbidden

I have a test setup running with a MaaS Server, a JuJu Server and a number of Nodes in the MaaS Cluster. After I reinstalled my MaaS Server (and subsequently the JuJu-Core Server) with Saucy instead ...
0
votes
1answer
3k views

How to configure system wide proxy with user authentication

I would like to use my LAN's proxy server in Ubuntu Desktop 12.04, but all my attempts have failed. Here is what I did: 1) I went to System Settings Menu > Network, selected Network Proxy, Manual ...
0
votes
0answers
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...
4
votes
2answers
8k views

Save print server authentication credentials

At my work, I print through a print server. My /etc/cups.d/client.conf file is: ServerName the.appropriate.server.location With this configuration I have to log in with a username and a password ...
3
votes
1answer
377 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
0answers
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 ...
21
votes
6answers
30k 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. ...
0
votes
0answers
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 ...
0
votes
0answers
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 ...
0
votes
0answers
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 ...
0
votes
0answers
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 ...
25
votes
2answers
18k views

How can multiple private keys be used with ssh?

I was able to setup ssh to use private/public key authentication. Now I am able to do ssh user@server1 And it logs on with the private key. Now I want to connect to another server and use a ...
5
votes
1answer
2k 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 ...
13
votes
4answers
9k views

I deleted the “/etc/passwd” file and cannot log in

I was trying to change my username and also my home directory (/home/username) and my system started to crash. I deleted the passwd file but I had a backup named passwd_bkp. I tried to rename this ...
1
vote
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 ...
1
vote
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 ...
1
vote
0answers
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 ...
0
votes
0answers
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 ...
1
vote
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 ...
1
vote
0answers
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
votes
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 ...
11
votes
4answers
23k views

Can't complete dropbox installation from behind proxy

Problem: My PC on campus sits behind a proxy (requiring authentication) and I can't setup Dropbox. I am convinced that this is a proxy issue as I can't setup Ubuntu one either (but I don't use Ubuntu ...
0
votes
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.
0
votes
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 ...
0
votes
0answers
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 ...