04-12-2013
Oh Thanks Help full Tips by fpmurphy
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
We currently take files (via FTP) off of a mainframe and save them as a text file on our server. This is done via a script. The next thing that is done to that text file is it gets zipped (using ZIP). This all works fine, but it doesn't appear that ZIP (the free version) has any way to password... (2 Replies)
Discussion started by: dsimpg1
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2. Programming
Hi,
I have usernames and passwords (to connect oracle DB) buried in so many shell scripts.
We want to externalize all usernames and passwords from those shell scripts and encrypt them and keep them in a file.
So far I found two choices,
1) Use some encryption algorithms like (RC5/MD5) to... (5 Replies)
Discussion started by: satguyz
5 Replies
3. Solaris
Hi all,
I have a server in the office that we connect to via telnet. Can anyone explain please how i can encrypt the password so it cannot be picked up in plain text by sniffing software like WireShark, etc.?
I'm not very experienced in Unix, so any ideas or even links would be great.
... (5 Replies)
Discussion started by: de049
5 Replies
4. Solaris
:DHi i am preparing a script to connect to oracle from solaris....
now i want that no one is able to see the password in the script.
is it possible...please help
Regards
Ankurk (3 Replies)
Discussion started by: ankurk
3 Replies
5. UNIX for Dummies Questions & Answers
In unix, i know the password encrypt by using salt
But how does it work? And how windows protect its password?
Thank you for helping in advance (5 Replies)
Discussion started by: cryogen
5 Replies
6. Shell Programming and Scripting
Hi, I have a Java app that looks for some parameters in a .properties file such as username and password. However I don't want to leave the password in a text file and I can't modify the app...
Does anyone have some idea about how to encrypt/hide/etc the password so it's not freely accessible... (1 Reply)
Discussion started by: Tr0cken
1 Replies
7. Shell Programming and Scripting
Please let me know the how to hide Oracle credential in below script:
PP.AIX.ETL:/XYZ/abc/dsclientprod/home/scripts/monthly > cat exec_sql.sh
set +x
# import our environment
#. /xyz/abc/dsclientprod/home/my.env
ScriptOutput=/QIS2FTP/HP_ST_UAT/dsclientprod/home/scripts/ScriptRunInfo.txt... (2 Replies)
Discussion started by: rajubollas
2 Replies
8. UNIX for Dummies Questions & Answers
if I change my password on two different servers, using the same string but the encrypted password in /etc/passwd look different.
If I copy an entry from one /etc/password to the other server. I can still log in to both servers using the same password. Only now both /etc/passwd entries are... (2 Replies)
Discussion started by: C0ppert0p
2 Replies
9. Shell Programming and Scripting
I am working on a script where we are using sqlplus command to connect to Oracle DB. But the schemaname and password used for sqlplus authentication, have to be hardcoded in the script.
DBconnection=scott/tiger@SID
sqlplus $DBconnection
Here any user who reads the script can read the... (1 Reply)
Discussion started by: max29583
1 Replies
10. Shell Programming and Scripting
Hi Gurus,
I need to encrypt the Db passwords which are stored in a configuration file (.txt) as below:
stage_db_pwd=ABC
this is test line
content_db_pwd=123def
This is test line 2
stg_db_name=xyz
I want to encrypt all the password fields (identified by "pwd"), encrypt them in the same... (3 Replies)
Discussion started by: ashishpanchal85
3 Replies
LEARN ABOUT REDHAT
pdl::tips
TIPS(1) User Contributed Perl Documentation TIPS(1)
NAME
PDL::Tips - Small tidbits of useful arcana. Programming tidbits and such.
SYNOPSIS
use PDL;
# Whatever happens here.
DESCRIPTION
This page documents useful idioms, helpful hints and tips for using Perl Data Language v2.0.
Help
Use "help help" within perldl or the "pdldoc" program from the command line for access to the PerlDL documentation. HTML versions of the
pages should also be present, in the HtmlDocs/PDL directory of the PDL distribution. To find this directory, try the following
perldl> foreach ( map{"$_/PDL/HtmlDocs"}@INC ) { p "$_
" if -d $_ }
Indexing idioms
The following code normalizes a bunch of vectors in $a. This works regardless of the dimensionality of $a.
$a /= $a->sumover->dummy(0);
What is actually happening?
If you want to see what the code is actually doing, try the command
PDL::Core::set_debugging(1);
somewhere. This spews out a huge amount of debug info for PDL into STDOUT. It is planned to eventually make this redirectable and the mes-
sages selectable more accurately.
Many of the messages come from "Basic/Core/pdlapi.c" and you can look at the source to see what is going on.
If you have any extra time to work on these mechanisms, infrom the pdl-porters mailing list.
Memory savings
If you are running recursively something that selects certain indices of a large piddle, like
while(1) {
$inds = where($a>0);
$a = $a->index($inds);
$b = $b->index($inds);
func($b,$a);
}
If you are not writing to $b, it saves a lot of memory to change this to
$b = $b->index($inds)->sever;
The new method "sever" is a causes the write-back relation to be forgotten. It is like copy except it changes the original piddle and
returns it).
Of course, the probably best way to do the above is
$inds = xvals ($a->long);
while(1) {
$inds0 = where($a>0);
$inds1 = $inds->index($inds)->sever;
$a = $a0->index($inds1);
$b = $b->index($inds1)->sever;
func($b,$a);
}
which doesn't save all the temporary instances of $a in memory. See "mandel.pl" in the Demos subdirectory of the PerlDL distribution for
an example.
PP speed
If you really want to write speedy PP code, the first thing you need to do is to make sure that your C compiler is allowed to do the neces-
sary optimizations.
What this means is that you have to allow as many variables as possible to go into registers:
loop(a) %{
$a() += $COMP(foo_member) * $b()
%}
expands to
for(i=0; i<10000; i++) {
a[i] += __privtrans->foo_member * b[i];
}
is about the worst you can do, since your C compiler is not allowed to assume that "a" doesn't clobber "foo_member" which completely
inhibits vectorization. Instead, do
float foo = $COMP(foo_member);
loop(a) %{
$a() += foo * $b();
%}
This is not a restriction caused by PP but by ANSI C semantics. Of course, we could copy the struct into local varibles and back but that
could cause very strange things sometimes.
There are many other issues on organizing loops.
We are currently planning to make PP able to do fixed-width things as well as physical piddles (where looping over the first dimensions
would be cheaper as there are less distinct increments, which might make a difference on machines with a small number of registers).
AUTHOR
Copyright (C) Tuomas J. Lukka 1997. All rights reserved. Duplication in the same form and printing a copy for yourself allowed.
perl v5.8.0 2000-06-01 TIPS(1)