Pluggable authentication modules (PAM)

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Allow alternate login method to decrypt home folder

I updated and rebuilt the guide for unlocking *buntu and derivatives via Common Access card here, and I've run into a sort of snag with logging into the DM (likely due to an encrypted home folder.) It ...
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1answer
32 views

PAM Module & nsswitch.conf

As i know, there are two authentication schema available on linux. PAM auth modules and, /etc/nsswitch.conf file When user logs in, which one take the precedence.?
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34 views

Most of my software just disappeared (Kubuntu)

Amarok, konsole, dolphin, volume control, and a lot of other software just disappeared after I restored pam.d to default last night. Is there some way for me to restore my software without restoring ...
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29 views

After ldap and pam installation I cannot log in my computer

after ldap (Server) and pam (client) installation I cannot log with my user or my root in my computer. Maybe I configured wrong in pam. But I know password for root and ldap admin. After reboot I ...
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1answer
96 views

14.04 Not authenticating on chsh command

I am trying to change my default shell to zsh. I have the entry placed correctly in /etc/shells file. Each attempt I have made with this command has ended with the same error message: chsh -s ...
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16 views

what is PAM.d directory usage

I saw pam.d directory on the etc directory. What is PAM and its usage . I saw that for the first time in here. Is that for authentication users ?
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76 views

pam_systemd delays SSH login - required?

On our Saucy servers (13.10) we are seeing long delays when logging into the systems via SSH. I figured out it is related to the line session optional pam_systemd.so in ...
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2answers
91 views

Can't login after killing X Server with encrypted home directory

I have ctrl-alt-backspace enabled to terminate Xorg in an xorg.conf.d file: Section "InputClass" Identifier "Keyboard Defaults" MatchIsKeyboard "yes" Option ...
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249 views

PAM USB on 14.04 su “username” = “no passwd entry for user 'Thornton'”

I followed the directions located here http://linuxconfig.org/linux-authentication-login-with-usb-device Once I reached step 4 I found that the changed authorizations did nothing, so I reverted back, ...
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34 views

In /etc/pam.d/sshd, what does “# [1]” mean?

In the PAM configuration file /etc/pam.d/sshd, there are a few lines ending in # [1]; for example: session optional pam_motd.so # [1] This doesn't seem to appear in any of the other PAM ...
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239 views

Add all new users and guest user to a group dynamically on ubuntu 14.04

I would like to add all the users (current, new, guest) to a particular group, lets say "audio" dynamically. Can you tell me how I can accomplish this ?
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39 views

How to properly invoke motd for SSH connections with PAM disabled

I have configured a nice motd message that shows me lots of relevant infos when I login to my VPS via SSH. As password authentication is disabled in sshd_config I would also prefer to disable PAM as ...
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111 views

Network Manager asks to unlock keyring after auto login

After updating from Precise to Trusty I get a popup requesting to unlock the keyring for Network Manager after each login (autologin is enabled). On the net people advise to make the connection ...
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59 views

PAM authentication using ssh key instead of password

When I try to use chsh to change my default shell, I get prompted for my user password. The problem is I log in using my SSH key and do not have a user password - by design. Yes, I can set a ...
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1answer
122 views

How do I enable a specific pam config in the lockscreen?

In Trusty, there is a new lockscreen that fits the look and feel of lightdm, and shares some config files, especially for pam. I am using libpam-fprintd to allow using my fingerprint reader when ...
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21 views

How to change location of .config directory

My home directory is located on a network filer with fixed quota. I'm running out of my quota as different applications saving their data in home directory. For example google-chrome, storing data ...
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113 views

PAM authentication failure

I got a dedicated server from a reputable hosting company. Unfortunately, they're one of those companies that thinks enabling root access is a good idea. I've successfully disabled root access and ...
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1answer
48 views

Non-root users to shutdown using PAM

I want to configure PAM to enable non-root normal users to be able to shutdown. how to do that? I'm using Ubuntu server 12.04 I know how to do that with many ways such as changing permissions of ...
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1answer
39 views

filter PAM_yubico.so debug stdout

I want to use the yubico-pam module (https://github.com/Yubico/yubico-pam) to enable challenge-response authentification using my yubikey when sudoing. I've managed to do that by adding the line ...
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171 views

Kerberos and google-authenticator (2-factor auth)

Does anyone know how can I use google-authenticator in combination with kerberos and thus provide to my users 2-factor authentication?
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66 views

libnss-extrausers change password

I have Ubuntu 12.04. Installed libnss-extrausers and configured nsswitch.conf. Now, users registered in /var/lib/extrausers/{passwd,group,shadow} are recognized by the system and can login. However, ...
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73 views

Running xrandr With pam_exec

Can anyone tell me why xrandr doesn't work when I run it using pam_exec? I'm having the same issue as 12.04 Resolution Changes on Lock + KVM only in 13.10, but I think I'm close to a solution. It's ...
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1answer
318 views

vsftpd hanging when using pam_exec or pam_script

I have VSFTPD integrated with pam_mysql, allowing me to successfully login to an FTP server using accounts kept in a mysql database. I need to automatically create a directory for the user if it is ...
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118 views

MOTD is updated very rarely

I understand that pam_motd updates the MOTD upon login, but sometimes MOTD just doesn't get updated for days and I'm puzzled what might be the reason. I'd like to add uptime and who outputs to the ...
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1answer
304 views

Sudo does not recognize my password anymore

The problem is happening on a remote server, so everything is done through ssh. I can login with my key, no problem here. I can change my password at will with passwd (which I believe shows that it's ...
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1answer
70 views

Gnome doesn't store password in keyring

I'm on 12.04, trying to extract my login credintials from ~/.gnome2/keyrings/login.keyring and not having much luck, looks like that keyring is empty. seahorse is showing it as an empty keystore. I ...
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388 views

How to mount a Truecrypt volume with cryptsetup 1.6 and above via pam_mount?

I installed cryptsetup 1.6.2 in 13.10 from this PPA. Versions above 1.6 feature Truecrypt volume support and I can successfully mount my volume from the terminal but haven't been able to automatically ...
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42 views

How to get users accounts info on Ubuntu Desktop using Mono C#?

Is there an Mono C# class or lib their can retrieve info abort all local users accounts on a Ubuntu/ linux system? For Ubuntu systems their is NOT on an domain-controller.
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2k views

Type password into login screen, hit enter - nothing happens

I first install Ubuntu 13.10 a few weeks ago and its been going great. I'm still pretty new to Linux, so I haven't been doing a whole lot. The past couple days I've tried installing LAMP, then ...
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1answer
36 views

how to manage ubuntu users from php

I have an Ubuntu 12.04 server machine in a local net, and I would like to log in my user through php. I have tried with pam_auth() but it wasn't configured neither activated for php. I tried a ...
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1answer
1k views

Getting error sudo: pam_authenticate: Module is unknown

I am new to Ubuntu and have installed Ubuntu 12.04.3 on my laptop. I need to install VAS on it but when I do I get the error: sudo: pam_authenticate: Module is unknown. And I cannot make any other ...
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3answers
175 views

Restore accidentally with rm'ed pam.conf?

I have accidently removed the files /etc/pam.conf and /etc/security/pam_env.confusing rm. Now I get this error message when I try to use sudo: sudo: unable to initialize PAM: No such file or ...
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1answer
315 views

Login with facial recognition in Ubuntu 13.04?

I have tried to install „PAM face authentication“ with the following commands: sudo add-apt-repository ppa:antonio.chiurazzi sudo apt-get update sudo apt-get install pam-face-authentication But it ...
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91 views

Identification and Authentication methods in Ubuntu

Since I have a very long password, I would like to additionally use an alternative login method. Which other authentication methods are possible in Ubuntu to log in?
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134 views

How to make sshd create non-existing user when using kerberos?

I am setting my sshd to use kerberos auth. Everything was fine until I actually login via ssh. I got invalid user. If I added the account to the server running sshd, then I could login using password ...
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1answer
58 views

Cascading Authentication PAM login

I'm trying to set up an authentication scheme for Ubuntu using the pam files. However, I cannot figure out how to have two separate methods of authentication. I've set up a Yubikey authentication, ...
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101 views

pam radius module access-reject

I am trying to set up an Ubuntu server that my users will connect to. I already have a Radius server running on a Windows box, and I would like for connections to this Ubuntu box to authenticate to ...
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1answer
159 views

USB PAM login with SD Card

I am trying to set up a PAM login token. I want to use an SD card instead of a normal USB flash disk. When I run the pamusb-conf to set up a new device, with the SD card inserted, it says that there ...
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246 views

passwd history through PAM not working (and weird 'Authentication token manipulation error' when using passwd)

I'm trying to set my password policy to remember the last two passwords a user chose, and to prevent him or her from re-using those particular passwords. I'm currently running Ubuntu 12.10 through ...
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128 views

Squid proxy pam_auth password expired in 60 days not taking ldap password policy

My openldap server Ubuntu 10.04.4 LTS with kernel verion 2.6.32-46-server my New proxy server 12.04.2 Lts with kernel 3.2.0-51-generic Ldap server having a policy for password expired in 90 days I ...
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1answer
101 views

Pam face authentication terminal install went wrong

I was following the steps from this link http://lkubuntu.wordpress.com/2011/06/28/pam-face-authentication/ I was trying to set it so I could use my webcam and face recognition to unlock my computer. ...
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21 views

Portable users on network

I am moving all my windows desktops to Ubuntu in my office. I have a phone system which allows my users to login on any phone thus any desk they sit at is 'their desk' I would like to do something ...
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148 views

ppolicy with pam_ldap - pwdReset has no effect when logging in from Ubuntu

We installed ppolicy overlay on our ldap server. Password policies work correctly for locking out user after X incorrect password attempts, but we can't enforce user to change his password. When we ...
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144 views

GNOME Does Not Enforce Password Complexity in 12.04

I'm lost on this: I have password complexity configured in /etc/pam.d/common-password and /etc/pam.d/common-auth. While logged in as a regular user I can reset a password from a terminal window and ...
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1answer
1k views

how to increase maximum open files for memcached service

Using ulimit -n i am able to set per shell based maximum open files limit To make this value persistent i am able to edit this is in /etc/security/limits.conf and restart the ubuntu 12.10 box, here ...
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470 views

How to make simple system user authentication work with postfix/dovecot on 12.10?

I have been wrestling on this a LOT. I never properly understood but I presume that authentication by the system users is done with PAM and the default authentication method for both Dovecot and ...
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1answer
306 views

How to recover faulty pam.d configuration?

I am struggle to login after configured kerberos in pam.d. Eventhough , I tried with root user , it also no use. I know, I did something wrong on that but how can I restore the pam.d configuration? ...
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1answer
181 views

Password not accepted at login

I had tried to setup kerberos authentication to log into some ADS thing at my new university, however that didn't work and resulted in me having to enter my password twice for everything. So I did: ...
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1answer
681 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 ...
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2answers
4k views

How to configure pam.d files for ldap over ssh on 12.04?

I'm trying to set up an Ubuntu 12.04 server so that users with a valid account in a remote ldap server can login to the ubuntu server. I've followed this guide closely: ...