Sponsored Content
Full Discussion: Useradd issue
Operating Systems Linux Red Hat Useradd issue Post 302410405 by m1xram on Tuesday 6th of April 2010 01:24:17 AM
Old 04-06-2010
Perl crypt()

See perldoc -f crypt.
Quote:
crypt PLAINTEXT, SALT
Where PLAINTEXT is the password in this case
Where SALT is a two character string, matches regexp /[./0-9A-Za-z]{2}/
Many people use seconds to come up with a SALT string but in a tight loop you may pull the the same second. Do something with this...
Code:
sub fractime () {
  use Time::HiRes qw ( time );
  my $now = time;
  $now -= int($now);
  return $now;
}

That will give you a factional time where you can use string operators to suck out two digits at a time and the modulo them to the set of 64 characters available for the SALT with...
Code:
sub randsalt($) {
  my ($fractime) = @_;

  my $saltset = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789./';
  my $salt = "";
  for (my $i = 0; $i < 2; ++$i) {
    my $s = substr($fractime, ($i * 2) + 2, 2) % length($saltset);
    $salt .= substr($saltset, $s, 1);
  }
  return $salt;
}

So we call these two functions in Perl and return the password.
Code:
my $ft = fractime();
#print $ft, "\n";
my $salt = randsalt($ft);
#print $salt, "\n";
print crypt($ARGV[0], $salt), "\n";

See attachment for Perl code and remember to 'chmod' it. We can now get the proper password in BASH with...
Code:
#!/bin/bash
PASS=$(./test8.pl somepassword)

I tested the 'useradd' command and it worked correctly with adding the account under Fedora12. Sorry for the hedge bet but the documentation says the default '-p' option is to disable the account? This sounds strange.

Good Luck.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

useradd

I work on some hp ux 11.00 Servers. i have to add an user. i use the useradd command like follows: useradd -u 72022 -g 71095 -c " comment " -d /PACKAGE_NAME/home/username -s /usr/bin/sh username The command returns with error 3. The manpage means value number 3: Invalid argument supplied to an... (6 Replies)
Discussion started by: ortsvorsteher
6 Replies

2. UNIX for Advanced & Expert Users

useradd

Hi. due to some needs i gave a user the premission to use useradd command with sudo. i want to know if there is a way to let him set the initial password, without giving him the premission to use passwd command as root (sudo). maybe a way to set a default password for all the new users that... (2 Replies)
Discussion started by: dorilevy
2 Replies

3. Solaris

useradd

Hi, I need to add a new user who will only be able to access one single folder on my Solaris 9 system. Can this be achieved by using just useradd or do i need to fiddle with auth_attr table? TIA, Selma (4 Replies)
Discussion started by: Selma
4 Replies

4. UNIX for Dummies Questions & Answers

useradd question

The man pages for useradd show the -k flag as a option, problem is I don't know what the description means. Could someone explain what "an alternative skel directory" is? Is skel an acronym? Thanks From the man page: -k, --skel skeldir Specify an alternative skel... (1 Reply)
Discussion started by: thumper
1 Replies

5. Shell Programming and Scripting

useradd

Gurus, I need to add a user to all the machines. I need a script to do this. I did one but it does not allow me to su to root within a ssh session i open. It exists saying su: Sorry. Please let me know how i can do it. I do not have the freedom of using sudo either. Regards (4 Replies)
Discussion started by: earlysame55
4 Replies

6. UNIX for Advanced & Expert Users

useradd?

Hi Experts, when using useradd command, what are the necessary options/arguments to be included? Please advice. (4 Replies)
Discussion started by: etcpasswd
4 Replies

7. Shell Programming and Scripting

Help with useradd script

Ok Im trying too make this shell script create users from my text file, I also want to type in a password for the new users. So thay can make a uniq one themself after first logon. #!/bin/sh # Sebastian schmidt clear echo "*************************************************************"... (3 Replies)
Discussion started by: chipmunken
3 Replies

8. Solaris

useradd

if useradd command is deleted in solaris how do we add user (3 Replies)
Discussion started by: vivek_ng
3 Replies

9. Solaris

useradd problem

:wall:i want to create a user in solaris whose password expires after every 30 minutes and he has to change his password after evry thirty minutes.How can we do that?:confused: thanx and regards, shekhar (17 Replies)
Discussion started by: shekhar_4_u
17 Replies

10. Solaris

useradd

I want to creat a 27 logins in solaris.Can anyone tell me how to write a script for that so that i create at a time for all 27 people. Thanks to guide me. (6 Replies)
Discussion started by: kkalyan
6 Replies
All times are GMT -4. The time now is 12:05 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy