Questions tagged [authentication]
Questions about authenticating wireless connections, SSH keys, or passwords in Ubuntu.
790
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PAM pwhistory module is not prompting for choose another password if password has been already used
I want set history password reusability limit. I am trying to use pwhistory pam module.
Below is configuration in /etc/pam.d/common-password file in Ubuntu (VERSION 20.04.1 LTS)
password ...
1
vote
1
answer
2k
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Samba with LDAP auth stopped working when upgrading Xenial to Fossa
We run an open source Java web application, which provides the users with a Windows file share to upload lots of big files. When a new
user account is added, the web app writes a user record to a ...
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0
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trying to update 16.04 to 18.04 ubuntu: Authentication error
I am trying to update a computer with Ubuntu 16.04 installed, but I get an authentication error, when trying to upgrade with the do-release-upgrade command.
$ sudo do-release-upgrade
Checking for a ...
0
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1
answer
560
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Software & Updates permission failed
OS: Ubuntu 18.04.5 LTS x86_64
Kernel: 4.15.0-135-generic
DE: MATE
When i run Software & Updates i get the following error:
You are not allowed to perform this action
You don't have the required ...
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0
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Just installed Yubico Yubikey for multifactor autentication and my MS Hotmail account in Evolution is suddenly failing authentication
I have just installed Yubikey and the authentication works for everything except now I have an authentication issue with my MS Hotmail account in Gnome evolution. I have uninstalled and re-added the ...
0
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1
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3k
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su Authentication failure when switching to non-root with password
I know the password of gqqtest as I can login via ssh.
> psftp [email protected]
Using username "gqqtest".
[email protected]'s password:
Remote working directory is /home/gqqtest
Now ...
0
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1
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3k
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802.1x wired password Authentication loop in ubuntu 20.04.2 LTS
I am student in a university. When I try to connect to the LAN using 802.1x password in ubuntu 20.04.2 LTS version(kernel 5.4.0-58-generic) it pops in a loop asking me that the authentication requires ...
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1
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LDAP authentication on Ubuntu 18.04
context
I'm trying to configure LDAP authentication on an Ubuntu 18.04 machine.
steps to reproduce
In order to do that, I followed the following steps:
apt install sssd libpam-sss libnss-sss
create ...
0
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0
answers
2k
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Mutt won't let me send emails because "Sasl authentication failed"
I've installed all the required packages for mutt to send emails smtp.
mutt -v
Mutt 1.13.2 (2019-12-18)
Copyright (C) 1996-2016 Michael R. Elkins and others.
Mutt comes with ABSOLUTELY NO WARRANTY; ...
4
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1
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Can not login to SDDM using fingerprint on Kubuntu 20.10
Recently I've bought Lenovo ThinkPad X1 Carbon Gen8. Everything seems fine except one thing - I can't fully configure fingerprint reader.
I've followed guide https://askubuntu.com/a/1082465/249099 and ...
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0
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307
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Passphrase-protected private key and automatic server directory mounting
I am learning sshfs on ubuntu 20.04, that is the client machine.
I have turned on SSH key-based authentication.
The Public key has been already stored on my server.
I set the passphrase for protecting ...
0
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0
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353
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SSH Ubuntu server not replying to mac client
I'm trying to connect to my Ubuntu server from my macbook client through ssh.
Port 22 is open and the server is not behind a router.
I've run sudo tcpdump -i any port 22 -n -Q inout
The request is ...
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1
answer
42
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How do host machine know about the private key in the machine which is doing ssh in it [ssh-copy-ip method ]
With this method:
ssh -i private key [email protected]
I am telling that here is my private key and ubuntu_A matches my private key with the public key in authorized_keys.
I am confused with ssh-...
1
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0
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Pop up keeps prompting for admin password on boot up
I keep getting a pop up requesting authentication with the following message:
Authentication is needed to run /usr/bin/apt as superuser
which if I am correct it sounds like apt is trying to do ...
0
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0
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I followed an FTP setup guide to try and setup FTP and now I have to enter my password for every file I want to access
Yesterday I tried to setup an FTP server and I almost got it but no luck. Now all my permissions are screwed up. Whenever I try to access my video files I am asked for password authentication for ...
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Samba share without authentication Ubuntu 18.04 server
INTRO
I'm going through the configuration of a samba standalone server on Ubuntu 18.04.5 server, virtual machine. Shared folders should be accessible without authentication.
Accessing with windows 10 ...
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1
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Why is the fingerprint daemon started when there is no fingerprint reader?
Whenever I sign onto (or unlock the passworded screen of) a recently installed 20.04 system, /var/log/syslog reports that it is starting the fingerprint authentication daemon:
…
Nov 15 13:29:28 ray-...
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3
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"Authentication required. System policy prevents WiFi scans" in FocalFossa
For those of you bothered by the deluge of annoying popups asking to authenticate pretty much every move one makes in Focal Fossa ("System policy prevents this and that" when mucking about ...
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1
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216
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How to disable FIDO authenticator?
Whenever I run the command ssh-add -K ~/.ssh/id_rsa, I get a prompt asking for the FIDO authenticator pin.
How do I disable the FIDO authenticator?
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0
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How do I forget my credentials for git from the command line?
I am trying to forget my credentials for git so I can close a repository using a PAT.
~# git clone [email protected]:your-username/atom.git
Cloning into 'atom'...
Warning: Permanently added the RSA host ...
1
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1
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2k
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How do I bypass the "Password needs to be longer" warning while setting a new password?
I want to have a password Ubuntu but is says it's too easy to guess
Can I bypass this?
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1
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Why do I have to authenticate again with password after having logged in with fingerprint?
The fingerprint reader on my Thinkpad X1 Carbon 7th works well on stock Ubuntu 20.04. I use it for all day to day logins without problems. However, after having logged in with my fingerprint to my ...
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1
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Enabling OpenLdap authentication in ubuntu 18.04
I am trying to enable LDAP authentication on my ubuntu client. So far I tried the following instructions:
https://www.tecmint.com/configure-ldap-client-to-connect-external-authentication/
https://www....
0
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0
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115
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Ubuntu can't connect to Sophos Access Point
I cannot connect to Sophos Access Point, it's look like it not even there. My conf:
Network logs:
out 06 11:49:54 pl1772 NetworkManager[646]: [1601981394.7931] device
(wlp2s0): Activation: (wifi) ...
0
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0
answers
98
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How to remove user authentication when trying to open a file? e.g .JPG
I am using Ubuntu 20.04 LTS.
I have recovered some files that were deleted in a HDD when I was using Windows some time ago.
I used foremost to recover my files, but the output directory ask me to ...
0
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1
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1k
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Username password authentication doesnt work as expected im mosquitto broker
Authentication with username and password doesnt work as expected in mosquitto broker..I am able to subscribe mosquitto_sub and publish mosquitto_pub to topics even if the username and password is ...
1
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1
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3k
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ssh: Cannot use pubkey authentication
I've been unable to ssh using pubkey authentication. I've been setting up a new server, and it just won't work.
My changes to the default sshd_config are set with this:
sed -i 's/#...
42
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2
answers
24k
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gvfsd-admin daemon authentication forces me to restart Ubuntu - VERY annoying!
I installed Ubuntu 20.04 on a new partition less than a week ago. I have not yet gotten all the basic stuff to work. But now, from time to time, 20.04 pops up a small window saying "...
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0
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Why is the ssh asking for password still?
I have generated an rsa key pair and am using it to ssh into my server without the need of a password. The server contains the file ~/.ssh/authorized_keys, into which I've copied the file in my client'...
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1
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I don't know the authentication password to download stuff [duplicate]
I got this computer from some one online and I don't know any of the passwords I manly need to just reset the authentication password is there a way to reset it without the authentication password
0
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2
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555
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Why does this users does not need PAM two factor Authentication for logging in?
I inherited a system from a departed colleague. He setup two factor authentication on the system, except for user root and ftpupload.
However, there is this particular user who has SSH access but does ...
2
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1
answer
5k
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fprintd and fingerpring authentication does not work after enrolling my fingerprints on Asus Zenbook UM431DA-AM003
I bought recently Asus Zenbook UM431DA-AM003 and installed Ubuntu 20.04 (Focal). I was trying to enroll my fingers using swipe method (not touch) and it worked fine:
~$ fprintd-enroll
Using device /...
0
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1
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2k
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CUPS Printer Sharing authentication
I have set up printer sharing on a (local) headless ubuntu server running cups.
My Question: Is there a way to add authentication (like username and password) to the shared printer, so only ...
0
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0
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78
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Multi-factor Voice Authentication
Was wondering if one could set up Multi-factor Voice Authentication along with traditional OTP based 2FA for logging in to their GNU/Linux, and superuser escalations. There are some posts from about a ...
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1
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36
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Graphical login as user who has no password [closed]
I'm using MATE desktop on 19.10. I've made a user who has no password, and I need to log in as them with a desktop (setting up WINE so they can play games.) When I just enter the username and press ...
1
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1
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User is not in the sudoers file.The incident will be reported [duplicate]
I have just set up a Remote Desktop connection on Ubuntu LTS server and whenever I tries to install something a window prompts and asks for a password. I have tried the password but it’s not accepting ...
0
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1
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530,5.7.0SMTP server error: MAIL FROM command failed Detail: Authentication Required
PHP Mail error with the message:
530,5.7.0SMTP server error: MAIL FROM command failed Detail: Authentication Required
Following are the key sections of my PHP Script.
new PHPMailer(true)
Host as '...
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0
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285
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Using different RSA keys for SSH
I've been silently learning from all of you for a long time. So thank you in advance for that! But now I got to a point where no google search can help with this issue I'm presented. I've found some ...
0
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2
answers
573
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Restoring sudo.config file to default
I had my laptop running pretty well, slowly going about the process of finding apps that would match what I'd been using on Windows. I cut and paste what I thought was installation for a Terminal ...
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2
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1k
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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 ...
2
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3
answers
937
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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 ...
1
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1
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2k
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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 [email protected]
OpenSSH_8.2p1 Ubuntu-4, OpenSSL 1.1.1f 31 Mar ...
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3
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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 ...
1
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1
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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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1
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217
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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 ...
0
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1
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2k
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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 ...
3
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1
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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 ...
0
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0
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325
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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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1
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40
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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 ...
0
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1
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616
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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 ...