boolean expression in bash Post: 302550416

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

how to use regular expression in Bash Shell Scripting

Hi, Actually i have written one test.sh (shell program) in bash. Here i have a variables $a which stored the value package1. Now I want to write a regular expression inside the if command that "if $a variable contains letter p in the begining of the value package1 then it is coming true....

2. Shell Programming and Scripting

Regular expression boolean in perl

How can I find out, that whether a regular expression are matched or not(as a boolean)?! tnx in advance.

3. Shell Programming and Scripting

[Bash]Function returning a boolean

Hello all, I would like to know if it is possible to return a the result of a boolean expression from a function like this function() { # some code return || } and what will be the return value ? Thank you for help.

4. Shell Programming and Scripting

Need help in Regular expression in bash shell

hi, I have written a script to search MAC address in a given directory. MAC address would be in format XX.XX.XX.XX. The digits contain hexadecimal numbers. For this i have used grep as follows. grep -rn '^\{1,2\}\.\{1,2\}\.\{1,2\}\.\{1,2\}\$' * This is not working as required....

5. Shell Programming and Scripting

Boolean expression issues

Hi everybody: I'm working on a script to send emails with logs attached based on one single rule..."check if the number of errors has increased since the last time the script ran" Basically what my script does is read from a previous file with the last trace of errors the previous error...

6. UNIX for Dummies Questions & Answers

Im new to bash scriping and i found this expression on a bash script what does this mean.

# check host value regex='^(||1|2|25)(\.(||1|2|25)){3}$' if ')" != "" ]; then if ]; then echo host $host not found exit 4 fi elif ]; then echo $host is an invalid host address exit 5 fi espeacailly the top regex part? ---------- Post updated at 06:58 PM ---------- Previous update was...

7. Shell Programming and Scripting

Hi im new to bash scripting I want to know what does the regex expression do ??

# check host value regex='^(||1|2|25)(\.(||1|2|25)){3}$' if ')" != "" ]; then if ]; then echo host $host not found exit 4 fi elif ]; then echo $host is an invalid host address exit 5 fi

8. Shell Programming and Scripting

Boolean expression

hi, im learning python language. and my teacher gives me this question on class: Boolean expression : not (p or not q) what is the correct answer for that? i still dont understand, and please give me a link for a new beginner in python to learn. thanks

9. Shell Programming and Scripting

Using boolean expression Bash script

Hi, Im trying to write a Bash script that calculates the least common subnet for two address. Theoretical: I have to change IP from decimal to binary, then apply XNOR on the two IPs. I tried to write this: #!/bin/bash echo "Ebter the first ip" read ip1 echo "Enter the second ip" read...

10. Shell Programming and Scripting

How to assign result of boolean expression?

Hello I would to write the test on one line like : declare -i x=0 y=0 ........ some code assign value 0 or 1 to x and y ........ # if either x or y or both is set to 1, then do something if -o ; then do_something fi Any help is welcome

LEARN ABOUT REDHAT

uri::url

URI::URL(3)						User Contributed Perl Documentation					       URI::URL(3)

NAME

       URI::URL - Uniform Resource Locators

SYNOPSIS

	$u1 = URI::URL->new($str, $base);
	$u2 = $u1->abs;

DESCRIPTION

       This module is provided for backwards compatibility with modules that depend on the interface provided by the "URI::URL" class that used to
       be distributed with the libwww-perl library.

       The following differences compared to the "URI" class interface exist:

       o  The URI::URL module exports the url() function as an alternate constructor interface.

       o  The constructor takes an optional $base argument.  The "URI::URL" class is a subclasses of "URI::WithBase".

       o  The URI::URL->newlocal class method is the same as URI::file->new_abs

       o  URI::URL::strict(1)

       o  $url->print_on method

       o  $url->crack method

       o  $url->full_path; same as ($uri->abs_path || "/")

       o  $url->netloc; same as $uri->authority

       o  $url->epath, $url->equery; same as $uri->path, $uri->query

       o  $url->path and $url->query pass unescaped strings.

       o  $url->path_components; same as $uri->path_segments (if you don't consider path segment parameters).

       o  $url->params and $url->eparams methods.

       o  $url->base method.  See URI::WithBase.

       o  $url->abs and $url->rel have an optional $base argument.  See URI::WithBase.

       o  $url->frag; same as $uri->fragment

       o  $url->keywords; same as $uri->query_keywords;

       o  $url->localpath with friends map to $uri->file

       o  $url->address and $url->encoded822addr; same as $uri->to for mailto URI.

       o  $url->groupart method for news URI.

       o  $url->article; same as $uri->message

SEE ALSO

       URI, URI::WithBase

COPYRIGHT

       Copyright 1998-2000 Gisle Aas.

perl v5.8.0							    2002-05-09							       URI::URL(3)