I have a file (status.file) of the form:
valueA 3450
valueB -20
valueC -340
valueD 48
I am tailing a data.file, and need to search and modify a value
in status.file...the tail is:
tail -f data.file | awk '{ print $3, ($NF - $(NF-1)) }'
which will produce lines that look like this:
... (3 Replies)
I have a file (DCN.txt) that has about 35000 lines. It looks like:
10004470028
10005470984
10006470301
10007474812
....
I have several other files (a11.txt, a12.txt, a12_1.txt, a13.txt, etc. about 70, each 100 mb large) that have history records like so:
LINE 10005470984 01/06/2010... (13 Replies)
Hi,
I have a file which got only one column and got some keywords. I have another file where the keywords used in the first file are repeated in the second file.
Now I would like to know how many times each keyword from the first file is repeated in the second file.
Request your help on... (1 Reply)
Dear Friends,
I am looking for a shell script to merge input files into one file .. here is my idea:
1st paramter would be outfile file (all input files content)
read all input files and merge them to input param 1
ex: if I pass 6 file names to the script then 1st file name as output file... (4 Replies)
In the below bash a file is downloaded when the program is opened and then that file is searched based on user input and the result is written to a new file.
For example, the bash is opened and the download.txt is downloaded, the user then enters the id (NA04520). The id is used to search... (5 Replies)
Hi everyone,
I am new to Unix and need help writing a script that can ask user for an input, then search that input within a file
I know will have to use the read and grep commands, anyone can give me somewhere to start would help
Task: Write a script to display which volume pool a given... (1 Reply)
Hi Don, this is not homework question. I work for a Credit card company and my development goal this year is to learn Unix. I would love if others can help me get started, thanks.
Hi everyone
I am new to Unix and need help writing a script that can ask user for an input, then search that input... (2 Replies)
Hi I have a CommonTemplateStop.template file . Inside the file i need to replace the variables DepName and CompInsName with the values(Trade and TradeIns) specified in the script. I have written the below .sh script in linux server which will read the .template file and has to replace the 2... (8 Replies)
Hi,
Below is my requirement
File1:
svasjsdhvassdvasdhhgvasddhvasdhasdjhvasdjsahvasdjvdasjdvvsadjhv
vdjvsdjasvdasdjbasdjbasdjhasbdasjhdbjheasbdasjdsajhbjasbjasbhddjb
svfsdhgvfdshgvfsdhfvsdadhfvsajhvasjdhvsajhdvsadjvhasjhdvjhsadjahs
File2:
sdh
hgv
I need a command such that... (8 Replies)
I have a very large file with millions of entries identified by @M. I am using the following script to "extract" entries based on specific strings/patterns:
#!/bin/bash
if ]
then
file=$1
else
echo "Input_file passed as an argument $1 is NOT found."
exit;
fi
MID=(NULL "string-1"... (10 Replies)
Discussion started by: Xterra
10 Replies
LEARN ABOUT DEBIAN
universal::require
UNIVERSAL::require(3pm) User Contributed Perl Documentation UNIVERSAL::require(3pm)NAME
UNIVERSAL::require - require() modules from a variable
SYNOPSIS
# This only needs to be said once in your program.
require UNIVERSAL::require;
# Same as "require Some::Module"
my $module = 'Some::Module';
$module->require or die $@;
# Same as "use Some::Module"
BEGIN { $module->use or die $@ }
DESCRIPTION
If you've ever had to do this...
eval "require $module";
to get around the bareword caveats on require(), this module is for you. It creates a universal require() class method that will work with
every Perl module and its secure. So instead of doing some arcane eval() work, you can do this:
$module->require;
It doesn't save you much typing, but it'll make alot more sense to someone who's not a ninth level Perl acolyte.
Methods
require
my $return_val = $module->require or die $@;
my $return_val = $module->require($version) or die $@;
This works exactly like Perl's require, except without the bareword restriction, and it doesn't die. Since require() is placed in the
UNIVERSAL namespace, it will work on any module. You just have to use UNIVERSAL::require somewhere in your code.
Should the module require fail, or not be a high enough $version, it will simply return false and not die. The error will be in $@ as well
as $UNIVERSAL::require::ERROR.
$module->require or die $@;
use
my $require_return = $module->use or die $@;
my $require_return = $module->use(@imports) or die $@;
Like "UNIVERSAL::require", this allows you to "use" a $module without having to eval to work around the bareword requirement. It returns
the same as require.
Should either the require or the import fail it will return false. The error will be in $@.
If possible, call this inside a BEGIN block to emulate a normal "use" as closely as possible.
BEGIN { $module->use }
SECURITY NOTES
UNIVERSAL::require makes use of "eval STRING". In previous versions of UNIVERSAL::require it was discovered that one could craft a class
name which would result in code being executed. This hole has been closed. The only variables now exposed to "eval STRING" are the
caller's package, filename and line which are not tainted.
UNIVERSAL::require is taint clean.
COPYRIGHT
Copyright 2001, 2005 by Michael G Schwern <schwern@pobox.com>.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
See http://www.perl.com/perl/misc/Artistic.html
AUTHOR
Michael G Schwern <schwern@pobox.com>
SEE ALSO
Module::Load, "require" in perlfunc, <http://dev.perl.org/rfc/253.pod>
perl v5.10.0 2009-03-30 UNIVERSAL::require(3pm)