Ubuntu Security :: Password Characters And Length

Mar 24, 2010

I need a little insight, and I�m not sure if the two can relate, but I am trying to find out the following.
When generating WEP Keys the available bits are: 64/128/152/256; however, you need 5/13/16/29 character respectfully for each key if you generate the key manually.Can this formula be applied to passwords and the length of the password? For example: if my password had 29 characters, could I say that my password is 256-bits?

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Software :: Password Management - The Password Length Must Be At Least 16 Characters Long

Feb 23, 2010

I have a requirement to set up linux system administrator password with respect to below guidelines... I was lookin at pam_passwdqc but not sure that it all the below mentioned criterias to be acheieved.. Please go thru the below criteria and let me know which utility should i use for it.

1 The password length must be at least 16 characters long.
2 The password must be different from the previous 20 passwords.# Not sure how to acheieve this
3 The password must be changed every 60 days.
4 The password must be different from the user ID. It must not contain any derivatives of the User ID. ]# Not sure how to acheieve this
5 The password must contain characters from 3 of the following 4 classes:

5.1 Upper Case
5.2 Lower Case
5.3 Numerals
5.4 Special Characters (for example: #, $, &, ].....)

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Security :: Force Password To 15 Characters On A Selected Accounts?

Apr 5, 2010

I would like to restrict a few selected accounts to minimum of 15 characters passwords. Other accounts,however, should still be able to login with 8 character passwords. This is in RHEL 5. Does anyone know how to go about it? I have checked PAM documentation and pam_cracklib.so has an option minlen. As per its documentation, minlen can force users to use 15 characters, but it forces every account on the system. I might be wrong too.

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Ubuntu Security :: Bad Login Protocols - Graphical Login For Gnome Sizes Itself To Accommodate A User's Exact Password Length

Dec 14, 2010

I'm seeing really bad user login format under a standard installation and am wondering why ubuntu does this as default. I have noticed that the graphical login for gnome sizes itself to accommodate a user's exact password length. This indicates to me that somewhere on the unencrypted part of a standard installation with user encryption contains at least some indication of the content of the password length which seems a security flaw even if not a complete hole, it majorly reduces the number of attempts a cracker would have to cycle through.

And that's assuming that *only* the length is contained. Furthermore it seems that it would be MUCH better to simply display the number of characters entered into the pw field and allowing the gui to expand itself from an fixed size as the field is filled out so the the user still receives visual feedback for entering characters. Either a simple character count display should be entered into the field or a 10 dot to new line so that one can visually quickly count the number enter by multiplying from a 10base graphical observation.

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OpenSUSE Install :: Change Password But When Type In The New Password Get This "The Password Is Longer Than 8 Characters?

Jan 8, 2010

hello i am trying to change my password, but when i type in the new password i get this:"The password is longer than 8 characters. On some systems, this can cause problems. You can truncate the password to 8 characters, or leave it as it is."my question is what kind of problem could i get and how can i change so i have to log in every time i start the computer?

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Ubuntu :: Change Root Password - Typing A Password, No Characters Show Up?

Mar 9, 2010

I'm really new to Linux so this will probably sound like a pretty naive question to most users, but how do you change the root password?To install Java, I have to type # su into Terminal,which then asks for the password.What's weird is that when I start typing a password, no characters show up. I don't know if this is supposed to happen or not.I've found a bunch of different sites on the Internet that explain how to change the root password, but none of them seem to work for my specific work station.

I've got Ubuntu 9.10 64 bit. In the GRUB boot menu, I can choose to boot normal or in recovery mode (I'm led to believe older versions don't have this option).I've tried typing # sudo passwrd into Terminal, but I already have a root password set up apparently, so I can't change it there.

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Software :: Maximum Password Length For A .zip Or .7z Archive?

Dec 27, 2010

What would be the maximum password length for a .zip or .7z archive? Or is there a max password length?

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Ubuntu :: 10.04 Get 4 Characters Entered In The First Password Field And It Freezes?

May 4, 2010

This is mostly an FYI. I have been messing around with an old desktop to see what I could do.

I installed an image of XP, then tried installing Ubuntu. I chose the option to install along side XP, and adjusted the partition size. The install gets to the point where I create my password, and I get exactly 4 characters entered in the first password field and it freezes. It did the same thing on two consecutive installation attempts.

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General :: Error - BAD PASSWORD: It Does Not Contain Enough DIFFERENT Characters

Oct 29, 2010

I'm trying to change the password for an account using the passwd command in Linux. However I'm getting the error:

"BAD PASSWORD: it does not contain enough DIFFERENT characters"

Even though the passwords I'm trying seem pretty safe and complicated enough to me. I googled and think this is controlled by something called cracklib? Don't know for sure though. How can I change the settings for this, perhaps lowering the amount of different characters required, or disabling whatever security setting is causing this error?

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General :: Setting The Password To Only Three Characters?

Feb 7, 2010

In Ubuntu 9.10 is there a way of setting the password to only three characters.If one goes to system, Preferences, About Me, the password can be reset, but it only lets you set it to eight characters, I would prefer three or less.

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Ubuntu Networking :: Can't Connect To Wifi Unless The Password Is Atleast 8 Characters Long?

Jan 20, 2011

When I need to type in the password to get on a wifi network, the "connect" button is grayed out and unclickable until I've typed in 8 characters for the password, making it impossible to connect to networks with shorter passwords. I'm not sure if this problem is unique to 10.10 or not, I've been using linux for a couple years now and I've never tried to connect to a network with such a short password before until last weekend, after my friend figured out how to change his password from the one his ISP set for him.

I'm running Xubuntu 10.10 on an IBM T42 laptop, here's the relevant hardware from the lspci command, 02:01.0 Ethernet controller: Intel Corporation 82540EP Gigabit Ethernet Controller (Mobile) (rev 03) 02:02.0 Network controller: Intel Corporation PRO/Wireless LAN 2100 3B Mini PCI Adapter (rev 04)

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Ubuntu Security :: Change Keyring Password To Match Login Password

Jun 14, 2011

everytime i try to vnc to my box, it pops up the keyring authentication, which is obviously a huge problem when logging in remotely.how do i change my keyring password to match my login password?

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Ubuntu Security :: Generate Password / Encryption Keys For Password

Oct 22, 2010

I know this has probably been asked too many times here but I need to secure my emails. Personal matters of course. But yeah. I use the program "Password and Encryption Keys" to generate a key to sign my emails with but I do not know what to do. To be blunt, I'm stupid when it comes to this. IF not, steps in creating a key? and giving it (my public key) to the significant other? Finding where both keys are? Implementing it into Thunderbird? If it helps any here's some extra information: Ubuntu distro: Ubuntu 10.04 Email client: Thunderbird

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Ubuntu Security :: Want To Change Password To Weak Password

Jan 13, 2010

How can I force passwd to use a simple password?I want to change my passwd & delete passwd history (if stored).I plan on creating a Virtual Appliance that uses another password besides my testing password.

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Ubuntu Security :: Changing Password Seem To Be Potential Security Hazard?

Aug 3, 2010

I already posted a topic similar to this concerning the Desktop OS version, but this deals with the Netbook because unlike the Desktop, the Netbook is less cooperative. Allow me to elaborate: Today (or rather yesterday since it's not after midnight where I am), I changed my password because I was hopelessly confounded about how to get my Wireless Network card up and running after it had been installed and I was allowing my dad to use it. This issue has since been resolved, however...

When I chose my password during the original installation, there was no mention of it being "too simple." This is where the Desktop OS and the Netbook OS differ. The desktop will let me change it in the terminal without any errors. The Netbook will not. When I've attempted to revert it back to the original, it will not let me do so in the User Profile or in the Terminal. The Passwords and Encryption Keys application also does not appear to help.

So now even after I've changed it to a different "complicated" password I am still prompted to insert two different passwords since I changed my user password but I am unable to change the password I input during the installation. A bit screwy methinks. This is extremely important. I'd like to know how to change the original installation password.

If I can't change the main password on my laptop then this is a serious potential security breach just waiting to happen (especially since it's on a laptop and I will be hauling it around with me) and I will most likely install a different OS if this isn't resolved --- It would be very unfortunate since I spent the whole day fixing it and I really enjoy the interface. Luckily I can live with this on my Desktop since I'm not going to be hauling it around with me everywhere when the school year starts.

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Security :: Find Password Or Circumvent The Password Altogether?

Oct 1, 2010

I have a database created by an older program (not Access) that I need to open and retrieve information for my business. The manufacturer put a password on there so that only it's program could open it. I do not use that program, but it has information I need. Is there a way to find that password or circumvent the password altogether?

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Security :: Saw A Number Of Clients (customers) With Some Fun Characters Entries On Database?

Feb 16, 2011

My Linux server which is running my company website have been hacked. Today I saw a number of clients (customers) with some fun characters entries on my database. Access denial on really clients. Please assist, am running Linux Ubuntu 9 and I dont know where to start troubleshooting this. let me confession that I am still on the learning curve on Linux

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Ubuntu :: Delete All ASCII Characters In File - Leave Chinese Characters Only

Jul 8, 2011

What command could I use in terminal to delete all ASCII characters? That is, delete a-z, A-Z, 0-9, and all punctuation? I have a file containing Chinese characters, and I want to remove everything else and leave just the Chinese.

I can use grep to leave only the lines that have Chinese in them, but this still leaves a lot of non-Chinese stuff on those lines. Does anyone know how I could actually remove everything that isn't Chinese?

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General :: Does Non-printing Characters Escape Characters Still Needed For PS1 Definition?

Aug 28, 2011

While modifying the definition of my PS1, I saw that "[" and "]" markers should be added to help bash to compute the right display lenght. Many exemples on the web do not use them or even mention them.I searched for a solution to add them automatically, like with sed, but I didn't find any example.Are they still needed and is there a recommandation not to use sed to define PS1?

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OpenSUSE :: UTF-8 Characters On Vi / Can't Handle Those Characters Properly

Jun 16, 2010

I have my OpenSuse 11.1 box set up with utf-8, however, every time I try to open a file with utf-8 characters with vi it can't handle those characters properly.

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Ubuntu Security :: Can't Change My Password / What To Do?

Jan 4, 2010

I'm new to ubuntu. Now iam using Karmic Koala. I want to change my password. So i used,

system->Administration->users and groups to change my password . As i entered my new password and clicked on 'Change Password', It is saying, 'password changed'. But when I click the close button in the main users and groups window, it is asking for my password, and I am forced to enter my old password only.

After the window is closed, i logout to check whether my password is changed. But it is not. I have to enter my old password to login.

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Ubuntu Security :: Don't Accept The Password

Jul 17, 2010

i set my pass on ubuntu 10.4 and it work so good on installing app but suddenly it stopped working i thought i would restart my pc i tried to inter my pass again ubuntu don't accept it although it's surely true

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Ubuntu Security :: 9.10 - Old And New Password Confusion?

Aug 27, 2010

I had this great idea to try and change the UBUNTU password. So I took not so drastic effort..I went to System>Administration>Users and Groups. There I clicked on my login name.Clicked on Properties and used the Change Password Button to Change my login password. I did that. [I thought this is the way to change the login password]. After that as usual I tried to launch the Empathy! It started asking me about some Keyring password! I gave my new password and it worked. Now, the weirdness of the issue is that..

1)If I want to login to UBUNTU..I have to give the Old Password [The password which I gave when installing Ubuntu;as if the password change has not come into affect]
oO mount..I have to give old password
To update I have to give old password.
But!
2)To get my things done in Empathy..that is to get the Keyring Challenge done! I have to give the new password and old password does not work here.

I want to stop empathy from asking me about the KEYRING thing. Roll back the system to the previous state; before the password change thing. What exactly went wrong or right? and What is really happening to my system. I mean things are all normal, so far..but why the two passwords? I dont use any heavy things on my machine..just a bit of browsing and Empathy..thats all.and only the default applications are installed on my machine. I use Ubuntu Karmic 9.10.

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Ubuntu Security :: Getting A Users Password ?

Aug 30, 2010

I need to be able to capture a users password when they login. I am well aware of the security issues with this and I'm ok with this.

We run a call center and I am working on migrating from windows to Kubuntu for the callers. It's policy that all callers must report their password to me, so I already know of everyone's password. There has to be some variable/script that I can "hack" to get the password they typed in to the login screen.

What I'm trying to do is that when a user logs in in for the first time, their profile is automatically created and set up. Setting up network drives, email, pidgin (which the password is stored in plain text anyway, so forget about security on that one), web apps, etc.

Trying to find information on How to capture a users password and all have been responded with the usual lecture on why you shouldn't do this. So I've heard it all before and I know of the risks. Like I said, I already have the callers password on file. If I could capture it, I wouldn't have to manually setup each profile every time we get a new caller, which is often since turnover is quite high in call centers.

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Ubuntu Security :: How To Change Log In Password

Nov 27, 2010

Is it best to do this via the terminal or gui interface? does this meanthat the home folder encryption password is the same as the old login password?

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Ubuntu Security :: Keyring Keeps Asking For The Password?

Dec 21, 2010

Every time I log in, I get the "password for keyring default" question two or three times, unless I enter it immediately as it pops up, sometimes even that doesn't prevent it from respawning. What could be causing this? I'm using Maverick.

P.S. Hmm, I don't think I'll be watching the lunar eclipse much now, the sky is covered with smoke, maybe it's lunar apocalypse.

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Ubuntu Security :: Password Hacking By Bruteforce?

Jan 4, 2010

I think it is very easy to hack passwords in Linux, but I did not try it yet. If you use sudo you get 3 attempts for the correct password. But if you get enough time it should be no problem to hack it by bruteforce. Imagine a script an attacker places on your machine which runs for a few hours or days. I think it is much more effective to delete the user out of the admin (or adm?) group so that user cannot be any danger anymore. You would have to login with root and readd the user then.

You now say: but if you login with root you got almost the same effect as with sudo. Of course it is the same. That is why I would use a system (not sure which yet) to create sub enviroments of your OS, which got the attribute that they can run without root, only got one account that can sudo and once sudo access is denied there is no other way to login as root. You just can repermit sudo access by the parent os layer.

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Ubuntu Security :: Nm-applet Rejects Password?

Jan 23, 2010

As the title says, nm-applet rejects my password that I'm positive is correct.Using a custom compiz session,

Code:
#!/bin/bash
compiz &

[code]....

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Ubuntu Security :: Starting Up With Auto Password?

Jan 30, 2010

I decided to stop using my password to enter Ubuntu (recently installed) and switch to automatic start up. Hit the relevant key, then restart. Received three notices, closed two, entered pass to get encryption code at third, then nothing but a blank, Ubuntu-colour screen. Unable to open Ubuntu. How the heck to I get myself out of this trap?

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Ubuntu Security :: Changed Password Now Can't Logni?

Apr 10, 2010

I'm running 64-bit Ubuntu Karmic, Encrypted HDD.I changed my login passwordwhen i try to boot i click on my name and type in my new password i have 'authentication fail' when i type in my old password this happens"could not update ICEauthority file /home/chris/ICEauthority""Their is a problem with the configuration server. (/usr/lib/libconf2-4/gconf-sanity-check-2) exited with status 256""Nautilus could not create the following required folders/Home/chris/Desktop,/home/chris/.nautilusBefore running nautilus, please create these folders, or set permissions such that nautilus can create them."

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