01-31-2003
passwd opens /dev/tty for reading. And it will read /dev/tty to obtain a password. Before it reads the terminal, it reconfigures it to turn off echo, so that the password cannot be seen as it is typed. If that reconfiguration fails, passwd will give up. And after it has the password, it turns echo back on. Operations like these simply require a terminal.
If that behavior is acceptable, then the passwd command does indeed work in scripts just fine. The "problem" is that people want the script to be able to supply the password rather than the user of the script. In that case, you need expect.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello All,
I am working on Sco unix version 5.0.5.
The passwd command has somehow got corrupted and is only displaying the contents of the /etc/passwd file instead of changing the password.
I wanted to know if there is any other command through which you can change the password of a user from... (5 Replies)
Discussion started by: rahulrathod
5 Replies
2. Shell Programming and Scripting
-----------------------------------------------------------------------------Pls find my Q in the bottom---------------------------------------------
#!/bin/ksh
#+----------------------------------------------
#|
#| Usage: . scripts/run_all.ksh < scripts/run_all.txt
#|
#| This script... (2 Replies)
Discussion started by: thumsup9
2 Replies
3. Shell Programming and Scripting
As extracting of the file /etc/passwd the IDīs that have not been used in a range specifies. (2 Replies)
Discussion started by: oscar_acm
2 Replies
4. UNIX for Dummies Questions & Answers
hi all,
i was given by my supervisor a task to search for scripts which contain oracle sqlplus i.e "myusername/mypasswd @myDB" in every /home/userfolder, which are, all the scripts made by different user. I've done some find command to search string for sqlplus, but it may up too long to respond.... (8 Replies)
Discussion started by: Helmi
8 Replies
5. Shell Programming and Scripting
I am using Ubuntu linux desktop, and I am trying to schedule a sheel script to run every 10minutes.
These are the steps I have taken:
crontab -e
added and saved this line to the file
# m h dom mon dow command
*/1 * * * * /home/enzo/Desktop/dlrecentuse
restarted cron:
sudo... (5 Replies)
Discussion started by: daydreamer
5 Replies
6. UNIX for Dummies Questions & Answers
on Runnning passwd command on HPUX 11.23
I am getting
pam_chauthtok: Shared object load failure.
Pls help ... (1 Reply)
Discussion started by: ultimatix
1 Replies
7. Red Hat
how unix users able to change their password even if they have only read permissions and how backend process will be happening can u explain me which are files need to involved in this process (3 Replies)
Discussion started by: ponmuthu
3 Replies
8. Solaris
Hi all,
I have got a problem,
i have Solaris 8 server, where on running the passwd command, it says permission denied. I have checked /bin/passwd, /etc/passwd, /etc/shadow all have permissions as like one working server.
It is happening for root user and all other users.
i have tried... (6 Replies)
Discussion started by: varunksharma87
6 Replies
9. Shell Programming and Scripting
I am trying to add some code to the begging of a script so that it will remove all the .transcript files, when their is no coressponding .wav file. But it doesnt work.
This is the code I have added:
for transcriptfile in `$voicemaildir/*.transcript`; do
wavfile=`echo $transcriptfile | cut -d'.'... (2 Replies)
Discussion started by: ghurty
2 Replies
10. Shell Programming and Scripting
I have a file "file1" that contains several ip address , and the "file2" contains several records , each line in file2 contains somewhere the ip address that i am searching in the file1
I use the unix command grep -w
for i in `cat file1`
do
grep -w "$i" file2 >> file3
done
... (9 Replies)
Discussion started by: knijjar
9 Replies
LEARN ABOUT OPENDARWIN
passwd
PASSWD(1) BSD General Commands Manual PASSWD(1)
NAME
passwd -- modify a user's password
SYNOPSIS
passwd [-i infosystem] [-l location] [name]
DESCRIPTION
Passwd changes the user's password. First, the user is prompted for their current password. If the current password is correctly typed, a
new password is requested. The new password must be entered twice to avoid typing errors.
The new password should be at least six characters long and not purely alphabetic. Its total length should be less than _PASSWORD_LEN (cur-
rently 128 characters) although some infosystems allow longer passwords. Numbers, upper case letters and meta characters are encouraged.
Once the password has been verified, passwd communicates the new password information to the authenticating host.
-i infosystem
This option specifies where the password update should be applied. Under Mac OS X 10.3, supported infosystems are:
netinfo
(default) The netinfo database containing the user's password. If no -l option is specified, the local netinfo database is
assumed.
file The local flat-files (included for legacy configurations).
nis A remote NIS server containing the user's password.
opendirectory
A system conforming to opendirectory APIs and supporting updates (including LDAP, netinfo, etc).
-l location
This option causes the password to be updated in the given location of the choosen infosystem. When changing only the local password,
pwd_mkdb(8) is used to update the password databases.
for netinfo,
location may be a domain name or server/tag
for file,
location may be a file name (/etc/master.passwd is the default)
for nis,
location may be a NIS domainname
for opendirectory,
location may be a directory node name
The super-user privilages are not required change a user's current password if only the local password is modified.
FILES
/etc/master.passwd The user database
/etc/passwd A Version 7 format password file
/etc/passwd.XXXXXX Temporary copy of the password file
SEE ALSO
chpass(1), login(1), passwd(5), pwd_mkdb(8), vipw(8,) nicl(1)
Robert Morris and Ken Thompson, UNIX password security.
HISTORY
A passwd command appeared in Version 6 AT&T UNIX.
4th Berkeley Distribution June 6, 1993 4th Berkeley Distribution