10-17-2014
Quote:
Originally Posted by
Akshay Hegde
password=$(perl -e 'print crypt($ARGV[0], "password")' $password)
Hello, I am quite new to linux and was wondering what this line of code did?
Thank you very much!
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Anyone have a simple shell script that will prompt and accept screen input for each field that is required in the /etc/passwd file? (3 Replies)
Discussion started by: Relykk
3 Replies
2. UNIX for Dummies Questions & Answers
I'm using SAM to add users on an HP and they're adding fine. But in /etc/group it only lists the group names. It's not adding the users in there. Is there a way to have them put in there without going into SAM and modifying the group and adding them? I guess what I want to happen is when I add... (1 Reply)
Discussion started by: golfhakker
1 Replies
3. Shell Programming and Scripting
Hi guys!
Just was wanting to run a command that would allow me to seperate the currently logged in users.
Basically from this format:
user1
user2
user3
To:
user1|user2|user3
(Note the lack of a pipe at the end, not sure if thats possible)
Basically it needs to be in this... (11 Replies)
Discussion started by: crawf
11 Replies
4. UNIX for Dummies Questions & Answers
Hi
I have a txt file with 4 columns where I need to add 4 empty columns in the middle meaning that I need what is currently column 4 to be column 8 in a new file.
The idea is that I have to use the file as input in a program that reads the data in column 1 and 8, so the content of the other... (8 Replies)
Discussion started by: Banni
8 Replies
5. UNIX for Dummies Questions & Answers
Hello there,
I want to add new users to my system, so, being logged in as root I do useradd -m user_name, and the new user is added to the system. The problem is that it has more privileges than I expected. If I do su user_name then I am allowed to do cat /etc/passwd , so it is... (4 Replies)
Discussion started by: help.goes.here
4 Replies
6. AIX
Helle,
I want to create a .ksh script in order to realize the following :
I have a .txt file organized in a bloc of information, each bloc start with 000 as following:
000...
001...
003...
004...
000...
001...
003...
004...
.
.
My aim is to add a new... (6 Replies)
Discussion started by: zainab2006
6 Replies
7. AIX
I apologize if this is a simple/stupid question. When I add users in smit as root, many(most) of the fields are automatically popluated with some basic default values.
Some other admins here have access to create users via sudo, however when they create users (sudo smit users), the user gets... (3 Replies)
Discussion started by: mshilling
3 Replies
8. UNIX for Dummies Questions & Answers
Dear all,
I have a question. I have a txt.file as below. i want to add 3 more columns: column3=conlum 2*column2; column4=(1-column2)*(1-column2); column5=1-column3-column4. Do you know how to do it? Thanks a lot!
file:
column1 column2
a 1
b 20
c 30
d 3
... (2 Replies)
Discussion started by: forevertl
2 Replies
9. Shell Programming and Scripting
Hi guys,
I've a simple linux script (made by my friend), which adds users to the system from userlist file. it also creates user home dir and copies certain files to the directory. To be honest, am a newbie in scripting so am unable to fully understand how the script is working. unfortunately,... (30 Replies)
Discussion started by: vish6251
30 Replies
10. Shell Programming and Scripting
HI Guys,
I have below input.
Output Base on Below Condition.
1> if forth column is empty and next coming line have same name with \es then add that column name on all rows
2>rest of all are es:vsDataEUtranCellFDD
Input:-
CCL01736 CCL01736_7A_1 es:vsDataEUtranCellFDD ... (3 Replies)
Discussion started by: pareshkp
3 Replies
CRYPT(3) Library Functions Manual CRYPT(3)
NAME
crypt - one-way password encryption function
SYNOPSIS
#define _MINIX_SOURCE 1
#include <unistd.h>
char *crypt(const char *key, const char *salt)
DESCRIPTION
The first use of crypt() is to encrypt a password. Its second use is to authenticate a shadow password. In both cases crypt() calls
pwdauth(8) to do the real work.
Crypt() encrypts a password if called with a user typed key, and a salt whose first two characters are in the set [./0-9A-Za-z]. The
result is a character string in the [./0-9A-Za-z] alphabet of which the first two characters are equal to the salt, and the rest is the
result of encrypting the key and the salt.
If crypt() is called with a salt that has the form ##user then the key is encrypted and compared to the encrypted password of user in the
shadow password file. If they are equal then crypt() returns the ##user argument, if not then some other string is returned. This trick
assures that the normal way to authenticate a password still works:
if (strcmp(pw->pw_passwd, crypt(key, pw->pw_passwd))) ...
If key is a null string, and the shadow password is a null string or the salt is a null string then the result equals salt. (This is
because the caller can't tell if a password field is empty in the shadow password file.)
The key and salt are limited to 1024 bytes total including the null bytes.
FILES
/usr/lib/pwdauth The password authentication program
SEE ALSO
getpass(3), getpwent(3), passwd(5), pwdauth(8).
NOTES
The result of an encryption is returned in a static array that is overwritten by each call. The return value should not be modified.
AUTHOR
Kees J. Bot (kjb@cs.vu.nl)
CRYPT(3)