Questions tagged [authentication]

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

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apache authentication failing

my apache site configuration is as follow. When i enter https://www.example.br/netdata, login is require (which is correct), when i enter https://www.example.br/awstats or https://www.example.br/cgi-...
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131 views

Restricting login with pam_access.so

I've recently moved from RHEL to Ubuntu and am having an issue getting access.conf to work. On RHEL I would add "account required pam_access.so" to the system_auth and password_auth pam.d ...
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33 views

20.04 headless on Raspberry pi 4 re-install will not allow password authentication on ssh

I installed 20.04 on a new headless pi 4 - no problems. Using Raspberry Pi Imager and selecting 20.04 server each time. Decided to re-install for a clean production environment but the new ...
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37 views

SSH on Ubuntu 20.04 Windows 10 Subsystem ignores IdentityFile specified in .ssh/config

SSH flat out ignores the identity file I've specified in my .ssh/config file and will not use that key to authenticate with my work server. This is my config file: Host * # This is to fix ...
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13 views

Display and authentification

Sorry in advance for my english. I have a problem with my computer on ubuntu 18.04. I have a graphic card(gtx 1050ti) and when I connect the HDMI cable to the graphic card I can’t connect to my ...
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47 views

Unable to SSH to a local system; error (publickey, password), SSH key regeneration

I'm running Ubuntu 20.04 desktop and unable to SSH into it, getting the error(publickey, password). Here are the logs : ssh -vvv titan@192.168.0.122 OpenSSH_8.2p1 Ubuntu-4, OpenSSL 1.1.1f 31 Mar ...
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15 views

Authenticate keyring prompt upon opening chrome

Running Ubuntu 20.04. I have settings set to log in automatically when turning on the computer. When i first open Google Chrome, it always asks me to "Authenticate keyring" with my password. ...
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28 views

Escape timeout for, or cancel sudo fingerprint authentication and revert to password

In systems where the fingerprint scanner works, you can enable sudo authentication in the terminal, so that you can swipe your finger instead of typing your password when you issue "sudo" in ...
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30 views

Understanding /var/log/auth.log - Confusion about “pam_unix” and “polkit”

I am having an hard time understanding some lines inside my auth.log file from Ubuntu. Can you help me breaking down the pieces of this one? pkexec: pam_unix(polkit-1:session): session opened for ...
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Freeipa-client Second Factor: prompt and offline authentication

I have freeipa-client installed on my 20.04 LTS laptop. The Freeipa user has totp enabled which works with Ubuntu but has its limitations. Unlike Fedora or CentOS, Ubuntu does not separate my user's ...
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11 views

Automate firewall sign in

The network in which the workstation I use is configured with fortinet firewall and needs authentication. Internet inactivity of 2400s makes the firewall logout automatically. I am using remote access ...
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41 views

touch screnn + fingerprint problem

hello everyone lets define some constants pc name : HP Pavilion x360 system : Ubuntu 20.04 LTS the problems are can't find a way to use fingerprint for auth touch screen sometimes freezes for no ...
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How To Use Key Authentication With More Than One User

I have an interesting issue with my Ubuntu box that I feel like is probably just a configuration issue on my part but hopefully one of you wizards can help me figure it out. I have an Ubuntu 18.04.4 ...
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42 views

Is there a way to replace the login authentication with a pass-algorithm?

Is there a way to replace the login authentication with a pass-algorithm? I want to implement a different algorithm for each user. The idea of a pass-algorithm is that the user sees some information ...
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52 views

how to Setup Grub Password ONLY to access grub menu?

Need help to configure Grub Password only for accessing Grub Menu. I DO NOT want to enter user name and password at the time of each reboot. I've configured Grub User ID and Password by following ...
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425 views

Fingerprint Sensor not working (Ubuntu 20.04)

I've just installed Ubuntu 20.04 yasterday on my ASUS F512D (also known as X512DA), and everything is working fine, i was worried about the Ryzen 5 3500U and graphics not working, but everything just ...
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49 views

OpenSSH-Server in Ubuntu 16.04

Problem connecting to server I can ping the server (Ubuntu server 16.04 no GUI) and the server can ping the desktop (Ubuntu 18.04). I have installled Openssh-server 7.6p1 on the desktop machine. The ...
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26 views

Two Factor Authentification enabled - No login possible

I followed this tutorial to enable 2FA on my server. I followed the tutorial on the root user, as I wanted the root user only to get secures via 2FA. As I wanted to relogin and try out if everything ...
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23 views

Authentication Error followed by “Gave up waiting for suspend/resume device”

I got a Dell Latitude E6430 last night as a hand me down gift. All was fine I even checked for updates for the Ubuntu and it appeared all was up to date. I let it charge over night and this morning ...
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23 views

Thunderbird authentication failures after Firefox update

Today May 6, 2020 I was prompted to update Firefox software, which I did. Right after that, I get authentication errors when getting email on Thunderbird. I use email servers from two different ...
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28 views

Help Understanding auth.log Entry

Recent Ubuntu (v 18.04) convert and trying to understand a auth.log entry. May 3 00:38:58 dug pkexec: pam_unix(polkit-1:session): session opened for user root by (uid=1000) May 3 00:38:58 dug ...
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11 views

Adding authentication requirement for snapcraft applications

I have installed ubuntu server version 20.04. on my machines and deployed charmed kubernetes with snap/juju.However, not only does juju not require superuser privileges, but it throws an error when I ...
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82 views

“Device invalid” error trying to open Google Drive remote files with LibreOffice

Premise: I have never used LibreOffice's remote access option before - I just discovered it today and I think it might be very useful for me: I don't know how (nor whether) it works. I'd like to ...
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18 views

usb token driven authentication in ubuntu

how to configure the ubuntu authentication page to look into a file in the usb as the key rather than entering the password.? That is, a token exist in usb like a private key. its public key is stored ...
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30 views

Common domain authentication for multiple home PCs

I'm a software developer doing some baby first steps in linux administration, but now with the virus situation it's clear to me more than ever, that I need to set up my home PCs such that there will ...
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24 views

Is there a way to restrict user logins to be allowed from one server only?

My boss is concerned about unauthorized logins and tracking what servers the staff is connecting to. He has come up with this method that he wants me to try and implement. I don't want someone to do ...
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61 views

How to change language automatically when prompted for a password?

I have 2 languages (English and Lithuanian) on my system, and my password contains numbers for which I use the dedicated number row (above the letters) on my keyboard. It happens that the Lithuanian ...
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26 views

how to fix this nginx error failing (no syntax error in config file)

My nginx wouldnt seem to start. It states that I have an authentication error but I have no idea how to fix this. Any help will be appereciated. This is my sudo nginx -c /etc/nginx/nginx.conf -t ...
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118 views

How to smoothly login through openvpn with 2 factor auth?

I have a openvpn set up with 2 factor authentication via Google Authenticator app. In connection details I filled User name and Password (User key password empty). When I login for the 1st time I get ...
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2answers
70 views

SSH with keys not working

I had SSH working with keys, but for some reason it stopped and I can't figure out why. I've tried reconfiguring by copying over my public key, I've tried making sure its loaded in the client, and I'...
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33 views

How to make a script execute on failed physical login?

So I have setup the PAM for my laptop in such way that if there is a failed login attempt, a bash script is executed by which webcam takes a shot and on three consecutive failed login attempts a siren ...
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27 views

Authentication error

I just installed lubuntu 18.04 alternate i386 on a Dell Inspiron mini 9 910. The install went perfectly, but when I tried to set up the wifi, I got a password notification on Network Settings. I ...
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20 views

How to set a password for logging into remote servers that are normally accessed through public keys?

I have an AWS EC2 instance running Ubuntu 18.04. It uses public key authentication, and I can ssh into it using the .pem file. I also installed the ubuntu desktop environment on it, and also ...
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233 views

Turn off auth in ubuntu 19.10 in all components

How is it possible to turn off authentication everytime when pc wakes up after sleep? I'm just really tired of it, I am often closing my pc and then opening again and everytime Ubuntu requires ...
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1answer
40 views

GNOME password not the same as logon password

When I am trying to perform various tasks from within GNOME, I get this "Authentication Required" dialog: I type the exact same string, that I use to unlock from the lock screen, but I get access ...
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33 views

WiFi Authentication

I'm new to Linux and just starting out . However I can't get started as I can't connect to my WiFi network . I installed the drivers for my Realtek 8811CU and I can now see nearby WiFi connections ...
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1answer
26 views

Authentication Request mystery source

I recently upgraded from 16.04 to 18.04 LTS. An authorization request dialog repeatedly appears saying, "Please enter the password for account "bozoonthebus". I used to have a Yahoo email address ...
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159 views

16.04: Authenticate fails w/ Google Authenticator when configuring OpenVPN client on OpenWRT

I'm quite new to OpenWRT and I'm facing some problems here. I set up the OpenVPN server on a Ubuntu 16.04 PC using the OpenVPN Access Server web GUI, and correspondingly I got the client profile ...
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16 views

Authentication Dialogue Box Disappears Instantly

Note: I'm using KDE So, as of a few days ago, any time I'd have to enter my password (eg updating through Discover) the dialogue box pops up then disappears immediately before I can enter anything. ...
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110 views

How to stop popup asking to authenticate for everything

Ever since installing lightdm to fix the login password loop issue, I receive a popup asking me to authenticate from everything to wifi scans, to color profile, to refresh system repositories. I've ...
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85 views

How do I set Ubuntu to unlock screensaver with Yubikey

When I have this key: https://support.yubico.com/support/solutions/articles/15000006900-security-key-by-yubico I would like to use it to lock the screen when I pull it out and go away from computer ...
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81 views

Authenticate with Ubuntu One (launchpad) account

I have a team on Launchpad and I want to let the members log in to some web apps on my server. How can I let users log in with Ubuntu SSO/OpenId and check if they are member of a specific group there?
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120 views

Why am I getting this Authenticate message all of a sudden when I try to shut down my Ubuntu 16.04 desktop?

It asks for my password to authenticate a shutdown. This never happened to me before, am I hacked? This is the message, "Authentication is required for powering off the system while an application ...
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114 views

Unable to authenticate using SSSD

I have numerous Ubuntu machines authenticating users with a Windows Active Directory via SSSD, but I have one that fails. It simply appears not to use sssd for login authentication. getent passwd ...
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63 views

id_dsa authentication works in one direction but not the other

I have two laptops running 18.04. Both have identical .ssh folders. I can copy from the new one to the old one using scp with id_dsa authentication, but in the other direction this mode of ...
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74 views

remove the need of Authentication to access files in ubuntu

I tried steps mentioned below, but I cannot found the PasswordAuthentication Log into Ubuntu and click "Applications," "Accessories," then "Terminal." Type sudo nano /etc/sshd_config. Enter your ...
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117 views

RSA Public and private key authentication on command line/PHP

I've been asked to authenticate a public key received over an API via SSL using a POST method (Public key in header) The server has the private key and I need to authenticate the person connecting to ...
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1answer
234 views

How do I authenticate with ed25519 using the MariaDB client?

Whilst launching MariaDB via Docker using MYSQL_ALLOW_EMPTY_PASSWORD I was prompted to run /usr/bin/mysql_secure_installation. This makes sense but (like others) I prefer configuring things non-...
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24 views

How to remove Authentication required for installing update or remove packages? [duplicate]

I got Ubuntu 18.04 newly installed on my HP Pavillion. I'm trying to install a software but it's asking me to authenticate. I entered my password but got an error. I'm pretty sure my password is ...
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221 views

Authentication error code 2101

I am trying to launch the cyberghost vpn app. After giving the correct command and password, I get the following message: Authentication error! The error code returned is 2101. Wrong login ...

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