Questions regarding password-based authentication and password management

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2
votes
1answer
23 views

Can I unlock 'pass'?

In my search for a simplistic password manager, I found 'pass' and made it my choice. One unexpected difficulty, that I encountered, is that web searches about its features are difficult to phrase in ...
46
votes
5answers
69k views

Manually generate password for /etc/shadow

I need to manually edit /etc/shadow to change the root password inside of a virtual machine image. Is there a command-line tool that takes a password and generates an /etc/shadow compatible password ...
0
votes
1answer
783 views

Linux Mint MATE: Disable encrypted volume password dialog

I'm running the MATE edition of Linux Mint on my laptop. I have an external USB disk with a LUKS container on it. The USB disk is connected to the laptop's docking station. Whenever I connect the ...
2
votes
2answers
147 views

How can I run ssh-add on demand? Can it act as SSH_ASKPASS?

I want to ssh from user@local to user@remote several times per day with an encrypted SSH key, a situation which ssh-agent handles with a good trade-off between security and usability. I'd also like ...
3
votes
1answer
3k views

Resetting password in Linux Mint when disk is encrypted

I have a system (VM, actually) with Linux Mint 15 on it. The disk is encrypted, but I remember that password -- just not the password for my account. I've tried changing the command in GRUB from ro ...
0
votes
0answers
9 views

In Ubuntu Chromium does not load any saved passwords in Normal Mode but working fine in Incognito Mode

I have a weird problem. I recently did a software update for Chromium and now it does not load any off my saved passwords (I literally had hundred for all my clients.) When I go to manage saved ...
0
votes
0answers
16 views

ssh/git does not use GUI to ask for password after upgrade to to Ubuntu 16.04

I used to run Ubuntu 14.04 on my computer. Whenever I used ssh keys to log in to various servers, I used to get a GUI pop-up dialog asking me for the password for my key. After entering the password ...
3
votes
3answers
17k views

How to Use Encrypted password in shell script AIX

I had written a shell script that will connect with the Database to perform some operations This is my sample code #!/usr/bin/ksh . /home/ram/.profile sqlplus username/pwd@TNS<<EOF select ...
6
votes
3answers
3k views

Logged on via ssh-key, can I reset my account password?

I am logged in on a server via sshkey (ssh -i /home/me/.ssh/ssh-key me@server). I got sudo rights on that server from the admin, but I can't exercise them, since I forgot my actual Unix password (or ...
2
votes
2answers
833 views

Warn about password expiration without forcing change

It's pretty simple. I would like to figure out what combination of changes in /etc/login.defs and/or /etc/pam.d/system-auth-ac. I would need to perform to allow the following behavior: I want a ...
3
votes
1answer
38 views

groupadd -p Not Recommended?

I have a question about groupadd, specifically with password (-p). It says it is not recommended, "This option is not recommended because the password (or encrypted password) will be visible by users ...
0
votes
1answer
45 views

Ubuntu & Plesk - How to exclude a sub-url from password protection?

I have website which is password protected where runs a php app on it. Now I have to unprotect a sub-url of that website but without disablng the protection of the main site which is configured ...
-1
votes
2answers
71 views

Creating a user without a password on NetBSD

On my NetBSD installation, I have it set so that root has no password. I can login as root without typing a password. But, when I create a user with just useradd -m <username>, log out, then ...
1
vote
2answers
11k views

vsftp user authentication problems

I configured my ftp user's home dir to /var/www and set a password but I cannot login with ftp 127.0.0.1, it keep giving me 530 Login incorrect. Why is this? I'm sure I have typed the password right. ...
0
votes
0answers
18 views

Where are WiFi passwords stored in Linux Mint? [duplicate]

Where are WiFi passwords stored in Linux Mint? I have tried this looked into /etc/NetworkManager/nm-system-settings.conf, but could not find it.
3
votes
7answers
5k views

Hiding Password in Shell Scripts

How can I hide a password in shell scripts? There are a number of scripts that are accessing database. If we open the script others also aware the username and password. So if anyone knows how to hide ...
0
votes
1answer
30 views

How to delete password for current account

I just installed Ubuntu 15.10 on my new desktop. However, I want to erase the password of it. I followed the instructions here. I now can successfully login with out password, but I cannot use sudo ...
25
votes
3answers
96k views

How do you change the root password on Debian?

I want to change the password I assigned to root on my Debian webserver to something longer and more secure. Bit of an obvious newbie question, but how do I do that? I haven’t forgotten/lost the ...
2
votes
1answer
23 views

Can I make it so that all new users created in the future will have an expired password by default? [duplicate]

I want to make it so that every time anyone creates a new user on my system that user will be forced to set a password during their first login. I can't find anything in /etc/login.defs that will do ...
2
votes
2answers
14k views

can't ssh into remote host with root, password incorrect

I have a remote host, previously I can ssh into it with root and password ssh root@remote_host or I ssh into it first using a regular user account ssh esolve@remote_host and then su root and ...
3
votes
3answers
49 views

Sudo-like remembrance of passwords for own scripts

I have a script which requires a password for authenticating a web service. A single password for a pre-defined user will suffice, and the password should if possible be stored securely (not plain ...
67
votes
2answers
8k views

I accidentally typed my password into the login field, is it still secure?

I was looking down at my keyboard and typed my password in because I thought I had already typed my login name. I pressed Enter, then when it asked for the password I pressed Ctrl+c. Should I take ...
2
votes
2answers
57 views

Hiding passwords in wpa_supplicant.conf with WPA-EAP and MSCHAP-v2

My wpa_supplicant.conf looks like this: network={ ssid="Some name" scan_ssid=1 key_mgmt=WPA-EAP eap=PEAP identity="my-user-id" password="(clear text password here)" ...
3
votes
2answers
40 views

Feedback when entering passwords, without revealing length

I often SSH into a machine and use sudo on it. When entering passwords, I'm always afraid that another window will steal the focus. However, I don't want to display asterisks (with pwfeedback, for ...
0
votes
1answer
15 views

KSH password generator

How to make sure the generated passwords contains all these special characters: ?!/=\? Currently I'm using: pwd_usr["$i"]=`cat /dev/urandom|tr -dc "a-zA-Z0-9-_\?\!\=\/\"|fold -w 15|head -n 1` But ...
2
votes
2answers
1k views

How do I edit the hotspot configuration for Network Manager?

Running Arch/Linux with everything up-to-date and I use network manager's built-in hotspot function to share my Internet. I'm trying to edit the configuration (mostly the password, as I don't like ...
13
votes
3answers
19k views

Allow user1 to “su - user2” without password

I need to allow user martin to switch to user martin-test without password su - martin-test I think this can be configured in /etc/pam.d/su. There are already some lines in that file which can be ...
0
votes
1answer
42 views

rsync over ssh without typing the password each time [duplicate]

I got a bash script to synchronize data between two computers. It works fine but I have to type my password every time the rsync command is called. #!/bin/bash sourceIP="192.168.178.128" ...
0
votes
1answer
36 views

How can I avoid being prompted for a password in this script? [duplicate]

I’m using Amazon Linux. If I login as my “otheruser” user, and create a script, test.sh, with this text sleep 5 ; sudo reboot now I can login and run the script like so … [davea@mydevbox ~]$ sudo ...
0
votes
1answer
27 views

What's the difference between lpasswd and passwd commands?

Studying the CentOS/RHEL sysadmin manual, I can't understand if there are or what are the differences between these commands.
6
votes
2answers
9k views

export HTTP_PROXY and special characters in passwd

Suppose for the sake of argument my password below is abc123@ I need to authenticate my linux machine through a corporate proxy to get patches and updates... normally I'd use this: export ...
0
votes
0answers
50 views

Centos 7 root passwd reset

I was stupid enough to log my root password on one spot and that crashed so I lost my root password to my server. I followed the guild of ...
20
votes
8answers
23k views

How do you create a user with no password?

In os X it's possible to have users without passwords. If you inspect them with dscl their password show up as *. This is used for system users such as users for databases like mysql, pgsql etc. ...
13
votes
6answers
2k views

Is there a root password on OS X and Ubuntu?

When you setup a new Ubuntu or OS X installation a user is generally created for you. On OS X it is whatever username you pick. On Ubuntu (the server version) usually the ubuntu user is created. The ...
0
votes
1answer
22 views

Proper way of creating new accounts in passwordless systems [closed]

What is the proper way of delivering credentials in passwordless ssh systems (linux)? By passwordless I mean login using only SSH keys. Should I generate pair of ssh keys and deliver it to new user, ...
1
vote
1answer
31 views

How to encrypt/hide password in /etc/network/interfaces file on debian?

How can I encrypt/hide my - wpa-psk "password" - line in the /etc/network/interfaces file? Since it's uncovered and readable for everyone who can get in the file now. Or is it better that I use ...
0
votes
1answer
27 views

Moderate users homedirs - removing cleartext passwords [closed]

On one of Linux terminals I administrate, we allow users to write own scripts in bash/perl/python to enhance their administrative tasks. The problem with users is they don't always follow the rules. ...
5
votes
2answers
3k views

Why does pam_mount ask for password?

I used the pam-auth-update tool in order to enable some pam configuration profiles: PAM configuration PAM profiles to enable: [*] encfs encrypted home directories [*] Unix ...
1
vote
2answers
45 views

Last Password Change of A User [closed]

I'm am currently trying to figure out a command that will show the last password change of a user on a UNIX system. I have tried running the command passwd -Sa and it gives the password change date ...
0
votes
1answer
38 views

Bash script to change password in chroot

I have build a Linux From Scratch live CD and wrote an installer script for it. There is a step in that script in which I take an username and password from the user and create an user. The installed ...
1
vote
0answers
26 views

Dictionary attack GPG symmetric encrypted LUKS keyfile

I remember typing in a long phrase for the password. I wrote all the words I could have possibly used into a plain text file, combining the words I know were used in a certain order. I might have ...
1
vote
1answer
30 views

Mechanism behind password storage in sudo

Whats the mechanism behind sudo that stores the password for all subsequent calls to sudo?
3
votes
1answer
94 views

Is it possible to convert linux salted sha512 password hash to LDAP format?

We have an LDAP server which stores passwords and other user data. The server is not used for authentication of client machines though but only for authentication of client apps. So users change their ...
4
votes
2answers
4k views

Debian Log In Failure With Correct Password

So I have a Debian distro at home (considering getting ubuntu), and I can't login. When I use the correct password is does this thing where it makes it look like it's going to login, and then it ...
1
vote
1answer
22 views

Set user-specific password hashing rounds in PAM

In /etc/pam.d/common-password we have a line such as: password [success=1 default=ignore] pam_unix.so sha512 rounds=200000 Meaning, whenever anyone sets their password, hash it with 200,000 rounds ...
5
votes
2answers
256 views

How is the su command masking/protecting my password from being displayed on screen? [duplicate]

Apologies if this is an abstract question - I'll try to be as specific as possible. When I'm at the bash shell and switch to a different account via su - foo, I'm prompted for a password. The ...
1
vote
1answer
72 views

Puppet: Forcing user to change his password at next login

I am using `users' resource to create unix accounts and then set a default password. For this I have written the following manifest . node 'node2.example.com','node3.example.com'{ user { 'askar': ...
1
vote
1answer
30 views

Block regular users from changing their passwords: only root should be able to [closed]

For security reasons, I want to make it so that only root can change user's passwords This can be achieved if I set /usr/bin/passwd to 700. Now, if password aging is enabled or first login is enabled, ...
30
votes
3answers
4k views

Why is the password I entered not visible?

Below is an image of the process I took to create a user on bash in Linux. I understand that the password shouldn't be displayed for security purposes, but what I mean is, why do asterisks (or the ...
3
votes
3answers
9k views

How to Create a Encrypted Password

I want to know how can I create a encrypted password in Ubuntu 14.04 TLS. Tried this: makepasswd --crypt-md5 password_here Did not worked for me throwing this Error sysadmin@localhost:~$ ...