i am new to debian. I need to know after booting sequence login shell appears to get username and password. so what happens when user puts username and password ?? how this given username and password are matched with /etc/shadow file ??
my another question is what is role of /etc/pam.d/ authenticating username and password ?? does it work with shadow file or not ?
I want to know, how does changes happened in the encrypted password in /etc/shadow file , when user changing password . because user doesnot have access on that file
View 1 Replies View RelatedI know this is possible, the problem is all the guides seem to be out of date A combination of missing packages and obsolete packages are giving me a headache.
View 2 Replies View RelatedIn what cases would a user appear in /etc/shadow and not /etc/passwd
View 2 Replies View RelatedI am trying to write a remote access module. Is there any function in linux where I can give string (password entered by user) and compare it with the actual user password stored in /etc/shadow. Since the password is stored encrypted in /etc/shadow I cannot parse and compare. So I want some method to compare if my user entered the correct password..Is there any function for that..
View 6 Replies View RelatedToday i was going through some of security guides written on linux .Under shadow file security following points were mentioned.1)The encrypted password stored under /etc/shadow file should have more than 14-25 characters.2)Usernames in shadow file must satisfy to all the same rules as usernames in /etc/passwd.3)password for application Username should display * if username is not locked.4)If a user is locked it should be displayed as ! as the first character in second field of shadow file.
Confusion for point 1 and 2:Now i m confused as why the encrypted password should be more than 14-25 characters.Also what rules to satisfy How to check it?Confusion for point 3 and 4:There are lot of users with * as second field i guess they are not locked but according to 4th point there are lot of users with ! as first characters.How would i check whether they are actually locked or not.I m posting the output of /etc/shadow and /etc/passwd files for the account.
I am just wondering what encryption method the shadow file uses, so that I may be able to manually change it. I ask this because I am trying to make a web page that will allow people to change their linux password via a browser.
View 4 Replies View RelatedI'm trying to learn how to create a user account manually on the system, and I've edited the /etc/passwd and /etc/groups as well as creating a new home directory by copying /etc/skel but I'm stuck at how to generate an entry in the /etc/shadow file since it comprises of the hash and all?
View 4 Replies View RelatedI deleted root from passwd and shadow file.Can I crate a new root user?
View 1 Replies View RelatedI noticed that our /etc/shadow file is readable on a patch I released for one of our in house linux boxes a while back ago. Could they use it to gain access the root account etc? Our passwords are all MD5 encrypted.
View 5 Replies View RelatedWhat is the easiest way to replace a hash in a shadow file for one particular user, not using passwd, and when the current password is unknown?
View 3 Replies View RelatedI would like to grep all values other than encrypted password from /etc/shadow fileFor example,each line consists of 8 fields separated with :/The only thing that I want not to print out is the contents between first : and second : (encrypted password)
View 7 Replies View RelatedI am working on building a customized ISO image of a server based on linux. The thing is after the server is installed and run for the first time, three users have to be created for the various services to run properly. I want this to be automated. To achieve this what is was thinking is automatically enter the user entries in the /etc/passwd and /etc/shadow files through init scripts when the server starts for the first time after the installation. I tried creating user and assigning password in one of my machine, and the /etc/passwd and the /etc/shadow entries of this user I copied it into the other machine and tried login in on the other machine and everything worked fine. How I am trying to achieve this.
View 1 Replies View RelatedI'm running RHEL 5. When using the GUI System>Administration>Users and Groups, I get the error: The user database cannot be read. This problem is most likely caused by a mismatch between /etc/passwd and /etc/shadow or /etc/group and /etc/gshadow. The program will exit now.
Some research showed that I need to use vipw and vigr respectively to find an inconsistency between these two sets, which I did - to make it easy I copied each from [vipw | vigr] to an excel file and did =exact(%1, %2). There are no inconsistencies.
[Code]...
I've been trying to write php or perl code to generate the sha-512 password hashes in fedora. I've been unable to do the hashing which is encoded in the shadow file on fedora core 11. Does anyone have php or perl code which provides the hashing algorithm. (All of my attempts result in the encrypted hashing being longer than 86 character -- the length that crypt says the sha-512 should be)
View 3 Replies View RelatedAlthough "Shadow Windows" is set to "any" in CCSM I get no shadow under gnome panels. I tried adding (any) & class=Gnome-panel, but this does neither do anything at all. I'm using Debian Sid amd64, Compiz 0.8.4, X 1.7.7. Video card: ATI Radeon HD4570.
View 12 Replies View Relatedwe can save the users password in /etc/password file itself.then why a special file /etc/shadow is created to save the encripted password of users.
View 2 Replies View RelatedI am trying to get rid of the gnome panel shadow in ubuntu 11.04(classic, not using unity). I know that I can get rid of it using compiz but I do not want to use that. I suppose my question would be, where is the "panel-shadow.png" file located that I can edit and make transparent? I found it before but cannot for the life of me now.
View 9 Replies View RelatedI want to add 50 new users, not on the server yet I want to add them all to group Accounting - with 1 option, not user by user I want to setup a default password for them all, and have it say something like 'You must now change password or no access will be permitted' Any other options I also want to do once, not for each user?
View 3 Replies View Relatedi have VPS server and i installed Xserver on it and all ok i created new user for my client but i need to limit his access to the following
he can download and upload to his home file " browser by Firefox"
he can't install or use any application "just the one i installed it"
he can't see the file system or browser it !! if i can give him specific space on harddisk would be better
he can extract and compress files
he can't edit the settings ....
i have another sensitive folder and setting i don't want him to see it so how to limit his access?
I have just installed vsftpd on my debain server..I want to know how can I create a new user called mesk as FTP user and set a home page to some folder on my server? I tried this:
Code: Select allhtpasswd -c /etc/vsftpd/passwd mesk but got: cannot create file /etc/vsftpd/passwd.
How to attach an ordinary file as well as Excel file while sending mail to a particular user in red hat.
View 1 Replies View RelatedI just came back from a meeting with someone wo wants this functionality:When he saves a file on *his* machine, it will automatically get copied onto a server (this is on an office LAN). This is so if there's a virus attack on his machine, he will have an uninfected backup copy.
To make matters worse, the client machines will be WINDOZE. Apparently he's seen this kind of functionality at an office somewhere (he was saying something about "Microsoft" , but my brain has erased that part of the conversation ), and now wants it for himself.
I was thinking about Samba obviously, but the tricky part is doing the copying when the user *saves* a file. This will require hooks into the OS to see when a file is being saved.*If* I manage to persuade him to switch his client machines to Linux (which would be the ideal choice and make life far easier), how would it be done? I'd have to use the File Alteration MOnitor in the kernel, right?Would it be possible to write the copying code in a shell script?
I'm researching about symbolic links been used with samba / CIFS:I'd like that the user that uses a MS-Windows OS could see my shared folder on CentOS 5 and the symbolic links that are inside this folder. Well, it works but, the user will see that the size of the file is bigger than the real file. Apparently, CIFS gets the size of the symbolic link (aproxim.32K) and add it to the size of the file.Example 1: 100KB file, used with shared folder, MS-Windows's user will see 100KBExample 2: 100KB file, used with symbolic link inside a shared folder, MS-Windows's user will see 132KB. (Sym link + size of file)Is there a way to allow the user only see the size of the file, and not the file + symbolic links ?
View 1 Replies View RelatedI was just testing specifying limit on file size to a user and have added the following to /etc/security/limits.conf bob soft fsize 100 This basically should have said not to allow bob to create anyfile greater than 100Kb in size.
But the interesting thing is, if bob already has any file which is greater than 100Kb in size, it even doesn't allow to log him into the system both from console and SSH. Also nothing is logged in logs.. How do I configure it so that, bob can login to the system even though he has any file greater than 100Kb (but doesn't allow him to create file which are greater than 100Kb) ??
There's some sort of shadow on my right desktop. No idea how it got there and it persists through reboots.
View 2 Replies View RelatedThe shadow that is meant to appear under the bar at the top of the screen in unity seem to be overlaying on top of itself every time and eventually turned black
View 3 Replies View Relatedgetting a black shadow below the taskbar recently in ubuntu 11.04. anybody got an idea how to fix it?
View 5 Replies View RelatedI am moving my Linux server from Suse 10 to Ubuntu 9.04 and I moved the significant parts of /etc/shadow, /etc/passwd, and /etc/group over to Ubuntu 9.04. I am not able to login into the computer with the old accounts. The only problem I see is that the old accounts use Blowfish and DES to encrypt the passwords in /etc/shadow, and Ubuntu uses SHA512. If I change the passwords, the accounts will work. However; I have about 300 accounts to move, and I don't want to do that to all of them. I have tired Ubuntu Forums and talked to every linux expert I know, and no one has an answer.
View 7 Replies View RelatedI upgraded to F14 from F13, and when the process was complete, I noticed on my desktop, I have a strange drop shadow on the left-hand corner. As if it's shadowing an invisible window. You cannot interact with it, it's not "really" there.It is very annoying, and I can not figure out what it is, or what is causing it. I've checked all my plasma widgets and things like that, but it still persists.
Anyone run into this before or have any ideas?Here is a screenshot showing the shadow, I intentionally set my background to white, so you could see it best. But it shows up on top of any wallpaper. and you can clearly see it underneath translucent term windows/etc.
