I have a script that checks the redhat-release file to determine what security patch needs to be applied. Since there's a Red Hat 5 now, I need a redhat-release file from the various platforms (Desktop, Enteprise Workstation, and Enterprise Server) so I can build a proper search string. Also, it... (5 Replies)
These commands are placed in the MS Word Doc. with command options and the their respective examples.
hope this will help for the beginners.
Thanks.
Varun Gupta:D (2 Replies)
Hi all,
I tried to understand what this awk and sed does but cudnt understand.
Can any body explain what awk and sed means with one simple example each and complex examples each with explanation.
Thanks in advance. (7 Replies)
Hello,
Please move this if I chose the wrong forum category. This question pertains to Unix and Linux I believe. I google the difference between hard and symbolic/soft links and I understand the difference. What I am trying to find is a real example of a hard link being used in a Operating... (11 Replies)
Hi;
Can i have ne sample examples of of using " lwp-request" in shell script.
Is it necessary to have perl installed already in linux box for using this;
Thnks; (2 Replies)
I have written a C++ program to perform raytracing and would want to write some functions to help the user: examples, usage, help
I am wondering how this is done. Would I just put some functions in the main program? (4 Replies)
Hi, I need a word doc or pdf which contains lots of Shell Programming samples... This is for my open book examination, thanks in advance.. (2 Replies)
Discussion started by: karthikeayan
2 Replies
LEARN ABOUT DEBIAN
env::ps1
Env::PS1(3pm) User Contributed Perl Documentation Env::PS1(3pm)NAME
Env::PS1 - prompt string formatter
SYNOPSIS
# use the import function
use Env::PS1 qw/$PS1/;
$ENV{PS1} = 'u@h $ ';
print $PS1;
$readline = <STDIN>;
# or tie it yourself
tie $prompt, 'Env::PS1', 'PS1';
# you can also tie a scalar ref
$format = 'u@h$ ';
tie $prompt, 'Env::PS1', $format;
DESCRIPTION
This package supplies variables that are "tied" to environment variables like 'PS1' and 'PS2', if read it takes the contents of the
variable as a format string like the ones bash(1) uses to format the prompt.
It is intended to be used in combination with the various ReadLine packages.
EXPORT
You can request for arbitrary variables to be exported, they will be tied to the environment variables of the same name.
TIE
When you "tie" a variable you can supply one argument which can either be the name of an environement variable or a SCALAR reference. This
argument defaults to 'PS1'.
METHODS
"sprintf($format)"
Returns the formatted string.
Using this method all the time is a lot less efficient then using the tied variable, because the tied variable caches parts of the
format that remain the same anyway.
FORMAT
The format is copied mostly from bash(1) because that's what it is supposed to be compatible with. We made some private extensions which
obviously are not portable.
Note that this is not the prompt format as specified by the posix specification, that would only know "!" for the history number and "!!"
for a literal "!".
Apart from the escape sequences you can also use environment variables in the format string; use $VAR or "${VAR}".
The following escape sequences are recognized:
a The bell character, identical to "