Questions tagged [authentication]
Questions about authenticating wireless connections, SSH keys, or passwords in Ubuntu.
817 questions
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Authentication error when the system gets suspended
I am facing an issue where I am unable to log in to the system (Ubuntu 25.10, NVIDIA driver version 580.126.09) after it resumes from suspend. What makes this issue particularly strange is that it ...
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Disable fingerprint login on Ubuntu 25.10
The goal is to enable fingerprint authentication for sudo, but disable it for initial login. This question has been asked a few times, but the answers available here no longer work for Ubuntu 25.10.
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Hi, i am trying to stop the reset to enter username after 3 failed attempts login on ubuntu 22.04 UI login. I modified PAM and GDM3 but no luck
this is how my pam.d/common-auth
# --- LOGIN FAILURE CONTROL (10 attempts) ---
auth required pam_faillock.so preauth silent deny=10 fail_interval=900 unlock_time=0
auth [success=1 default=ignore] ...
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Can't open terminal : Attempted login by UNKOWN (UID: 1000) on /dev/pts/0
I seeking your help to tackle a bug I introduced and that's making my ubuntu difficult to use. It's my first question on this stackexchange, if there is any relevant information missing, or if my ...
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Why my sudoers file doesn't let me access?
I made this file:
/etc/sudoers.d/myfile
myuser ALL=(postgres) ALL
I rebooted the system and then I tried:
su - postgres
I entered MY password but it failed with su: Authentication failure, am I ...
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Ubuntu 24.04 Sudoers mailer notification
I'm trying to configure email notifications to be sent when a user enters an incorrect password upon sudo elevation. I've set this up in Ubuntu 22.04 (also works fine in RHel 8) with no issues ...
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Unity Launcher Icons failing in (pre-official-release) Ubuntu Unity 25.10
I installed Ubuntu 25.04 on a spare machine (a 2016 Intel Mac Mini), installed Unity (via sudo apt install ubuntu-unity-desktop) and then did a developmental upgrade (via sudo do-release-upgrade -d) ...
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User certificate provisioning on ubuntu
My organization has over 2,000 Ubuntu machines, and we’re looking to enroll user certificates on them to enable EAP-TLS authentication.
Any configuration assistance or documentation you can provide ...
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Kubuntu Local Logon MFA
Good day all,
I am looking to setup MFA (preferably using TOTP) for console log in, SSH log in, and to elevate privileges. I've attempted setting this up via the google authenticator PAM module and ...
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User-Management Solution for Ubuntu Nodes with users' details and encrypted passwords in a MySQL Database
We currently have around 30 Ubuntu nodes and about 100 users (these numbers may increase in the future). Our current authentication and user grouping system is based on Windows AD. However, due to ...
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Use Fingerprint Reader on Framework 13 laptop with Kubuntu 24.04
I had a bit of trouble getting the fingerprint reader to work for the lock screen (i.e unlocking the laptop after it's been in suspend or the screen locks after a few minutes).
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login/sudo via fido2 touch?
I would like to only use passwords as a back. The goal would be to login or sudo I would just tap the authenticator no password.
If I forgot the key at home I could use a password.
Any idea how to do ...
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udisksctl mount continues asking for authentication despite polkit config to allow bypass (Ubuntu 24.04)
What used to work in Ubuntu 20.04 is not working for Ubuntu 24.04.
My polkit setup for Ubuntu20.04 for allowing me to mount USB attached drives via udisksctl without the need for password ...
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How to add SSH Public key to Ubuntu Server (Raspberry PI) through Ubuntu Cloud?
Context: Raspberry Pi 3B+, LTS 24.04.1 Server
I tested the MQTT Core appliance, which automatically prompts the user to input for an Ubuntu SSO email address (step 5):
Next, you will need to enter ...
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Wi-Fi Hotspot failing with "802.1X supplicant took too long to authenticate" error on Ubuntu 24.04.1 LTS
Using my laptop's Ethernet connection to create a Wi-Fi hotspot no longer works on Ubuntu 24.04.1 LTS (it worked on Ubuntu 22 LTS and previous LTS versions). My network card definitely supports it, ...
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