06-09-2013
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I'm tasked to change a user's password on multiple Linux systems (RH v3). I though copying the encrypted password from one Linux /etc/shadow file to another would work but I was wrong.
The long term solution is to establish an openLDAP Directory service, but for now I'm stuck with a manual... (1 Reply)
Discussion started by: benq70
1 Replies
2. Shell Programming and Scripting
Hi Friends.
I am new to scripting now i want to change the root password using the script with standard password.
which is the easy scripting to learn for the beginner, Thanks in advance. (2 Replies)
Discussion started by: kurva
2 Replies
3. Shell Programming and Scripting
Hi all
I have some 106 users of which i need to change the password of them to a common one. I dont know their paswword. But i need to reset them to a common one. How can i do this with a shell script? It would be a great help if some one can help to sort out this.:b::b:
I know it can be... (0 Replies)
Discussion started by: Tuxidow
0 Replies
4. Solaris
Hi All,
How to enforce all users to change their password when they try to login.
I am having Solaris 9 and 10.
Even it would be much better if anyone can say to enforce all users to change their password next morning they login.
Thanks in advance,
Deepak (3 Replies)
Discussion started by: naw_deepak
3 Replies
5. Shell Programming and Scripting
We have a server where we have a number of user ids and we also have the list of old passwords in a CSV file.
Now we want to change the password of all the users and assign them a default password.Can we write a shell script to do that.
I am planning to read the user name and corresponding... (7 Replies)
Discussion started by: dr46014
7 Replies
6. Solaris
Hi All,
How to restrict the NIS users not to change their passwords in for NIS users??
and my NIS user is unable to login to at client location what could be the problem for this ?
Any body can help me. Thanks in advance. (1 Reply)
Discussion started by: Sharath Kumar
1 Replies
7. UNIX for Advanced & Expert Users
Hello - Is this possible on Unix machines? Can we update user password change time? (6 Replies)
Discussion started by: manju--
6 Replies
8. Shell Programming and Scripting
Hi All,
I am having Solaris 5.10 acting as NIS.
How do i change multiple user password in NIS in a batch.
I have predefined users with their passwords to be set:
Example:
user1 password1
user2 password2
Pls advise. (0 Replies)
Discussion started by: yogajwa
0 Replies
9. AIX
Hi
I want to change password for around 100 users on an aix server.
I have the list of those 100 users with me.
instead of doing
# passwd username
for all the 100 users one by one, can you please help with a script through which we can change the password for all the 100 users in a... (2 Replies)
Discussion started by: newtoaixos
2 Replies
10. Forum Support Area for Unregistered Users & Account Problems
I was unable to login and so used the "Forgotten Password' process. I was sent a NEWLY-PROVIDED password and a link through which my password could be changed. The NEWLY-PROVIDED password allowed me to login.
Following the provided link I attempted to update my password to one of my own... (1 Reply)
Discussion started by: Rich Marton
1 Replies
PASSWD(5) Linux Programmer's Manual PASSWD(5)
NAME
passwd - password file
DESCRIPTION
Passwd is a text file, that contains a list of the system's accounts, giving for each account some useful information like user ID, group
ID, home directory, shell, etc. Often, it also contains the encrypted passwords for each account. It should have general read permission
(many utilities, like ls(1) use it to map user IDs to usernames), but write access only for the superuser.
In the good old days there was no great problem with this general read permission. Everybody could read the encrypted passwords, but the
hardware was too slow to crack a well-chosen password, and moreover, the basic assumption used to be that of a friendly user-community.
These days many people run some version of the shadow password suite, where /etc/passwd has asterisks (*) instead of encrypted passwords,
and the encrypted passwords are in /etc/shadow which is readable by the superuser only.
Regardless of whether shadow passwords are used, many sysadmins use an asterisk in the encrypted password field to make sure that this user
can not authenticate him- or herself using a password. (But see the Notes below.)
If you create a new login, first put an asterisk in the password field, then use passwd(1) to set it.
There is one entry per line, and each line has the format:
account:password:UID:GID:GECOS:directory:shell
The field descriptions are:
account the name of the user on the system. It should not contain capital letters.
password the encrypted user password, an asterisk (*), or the letter 'x'. (See pwconv(8) for an explanation of 'x'.)
UID the numerical user ID.
GID the numerical primary group ID for this user.
GECOS This field is optional and only used for informational purposes. Usually, it contains the full username. GECOS means
General Electric Comprehensive Operating System, which has been renamed to GCOS when GE's large systems division was sold
to Honeywell. Dennis Ritchie has reported: "Sometimes we sent printer output or batch jobs to the GCOS machine. The gcos
field in the password file was a place to stash the information for the $IDENTcard. Not elegant."
directory the user's $HOME directory.
shell the program to run at login (if empty, use /bin/sh). If set to a nonexistent executable, the user will be unable to login
through login(1).
FILES
/etc/passwd
NOTES
If you want to create user groups, their GIDs must be equal and there must be an entry in /etc/group, or no group will exist.
If the encrypted password is set to an asterisk, the user will be unable to login using login(1), but may still login using rlogin(1), run
existing processes and initiate new ones through rsh(1), cron(8), at(1), or mail filters, etc. Trying to lock an account by simply chang-
ing the shell field yields the same result and additionally allows the use of su(1).
SEE ALSO
login(1), passwd(1), su(1), getpwent(3), getpwnam(3), group(5), shadow(5)
COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 1998-01-05 PASSWD(5)