Pluggable authentication modules (PAM)

learn more… | top users | synonyms

8
votes
9answers
21k views

Desktop login fails, terminal works

I have a freshly setup 12.04 LTS pc system (120 GB SSD, 1 TB HDD, 16 GiB RAM); since a few days, I can't login to the graphical desktop anymore: there is very short flashing shell window which ...
12
votes
2answers
18k views

How do you set requirements (such as minimum length) on passwords?

Is there any way to set up minimum passcode requirements, such as a minimum length, requirement of mixed case alphanumerics and at least 1 symbol in the passcode, and enforce that at passcode changes? ...
8
votes
1answer
571 views

Use one password for administration and another for system login

How can I give a user one password for normal usage when logging in, and another password for system administration and sudo access? I want one user to have two passwords.
2
votes
2answers
3k views

Pam_mount won't automount encrypted partiton

As usual, when I install a new version of Ubuntu I install pam_mount to automount my with LUKS encrypted partition on login. However, for Ubuntu 11.10, I followed the same procedure as usual, but I ...
0
votes
0answers
73 views

How to Fuse Mount into Home Folders - After EcryptFS is mounted?

Question: In Linux, how do you automate a folder to be mounted into a User's Home Folder? -- But with these constraints: Only After their Encrypted Home Folder has been mounted -- so the mount ...
3
votes
1answer
2k views

how to setup two factor authentication in Ubuntu for Ubuntu users using Google authenticator?

How to setup two factor authentication in Ubuntu for Ubuntu users using Google authenticator (It can also be setup for non Google accounts)?
5
votes
1answer
4k views

How do enforce company password complexity?

I need to configure a Ubuntu 10.04 server to follow a strict company password policy that specifies the following: at least one upper case at least one lower case at least one digit at least one ...
4
votes
1answer
3k views

I cannot login into any TTYs

My system is Ubuntu 11.10 (installed from 0, without upgrades/updates). When I enter into any tty (1, 2, 3..) it ask me my login name and password but I can not move forward. When I enter an user ...
4
votes
3answers
13k views

Where are passwords stored?

How do you figure out where are user's passwords stored, for users that can login? I know the system is using LDAP for users (username, home path, etc.), but it doesn't contain any kind of passwords. ...
1
vote
0answers
33 views

winbind and passwd issues

I successfully configured a Ubuntu 15.10 Workstation to authenticate against Active Directory. The only thing left so far is the ability to change the Active Directory password. When I enter the ...
0
votes
2answers
820 views

NFS users getting a laggy GUI expierence

I am setting up a system (ubuntu 12.04) that uses ldap, pam, and autofs to load users and their home folders from a remote server. One of the options for login is sitting down at the machine and ...
5
votes
1answer
1k views

Permanently raising nofile limits in Ubuntu 14.04 LTS

I cannot seem to figure out what exactly is needed to allow the maximum number of file descriptors to be raised permanently for all users. /etc/security/limits.conf: root hard nofile ...
3
votes
3answers
8k 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 ...
1
vote
1answer
437 views

PAM LDAP pam_ldap.so: failed to map segment from shared object: Cannot allocate memory

Im trying to get VSFTPD to work with LDAP using PAM. (since it does not sleep with SASL) If I login into FTP with a Shell credentails it works fine, but when I try to use an LDAP creds to login via ...
0
votes
1answer
311 views

Slow login when CIFS mounts are unavailable

I installed a PC with Ubuntu 14.04, Sssd and accounts in our OpenLDAP directory. Network shares residing on our Samba server are mounted automatically when a user logs in, through pam_mount ...
0
votes
1answer
114 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?