04-02-2011
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi,
If I want to have a look at few lines of the file, how do I, what command to use.
Eg: If I have a file having length 2000 lines and I want to have a look at the content between 1400 and 1600, How do I look at it ?
Also, If I want to have a look at function alone in a file, how do I go... (4 Replies)
Discussion started by: sharuvman
4 Replies
2. UNIX for Dummies Questions & Answers
This is truly dummy question.
I have a text file of 100 lines.
What unix commnad to extract line 20 to 40 and output it to another file?
Is it something cat or grep or >> ?
Thanks (6 Replies)
Discussion started by: champion
6 Replies
3. UNIX for Dummies Questions & Answers
I have a file that has 1k lines and i want to print all the lines after 900th line.
an 2)I want to move files f1 ,f2,f3,f4 to p1,p2,p3,p4
Please give me the commands.
Thanx in adv. (6 Replies)
Discussion started by: rajashekar.y
6 Replies
4. Shell Programming and Scripting
Hi,
I am sure this is possible in awk or sed or a combination of the two.
Can someone help me determine the best way to display or print certain section of a file, ie only certain number of lines.
Example: File1 1 has 20 lines.
I need to be able to print from line 5 to line 10 of this file.... (2 Replies)
Discussion started by: jerardfjay
2 Replies
5. Shell Programming and Scripting
Hi
to all in this great forum, im sure this has been asked lots of times before but ive been looking for the past day and cant find the answer.
I use cat/some/file to display its contents but how can i get it to not display hashed out lines, or do i need another command,
Thanks in advance:) (5 Replies)
Discussion started by: dave123
5 Replies
6. Shell Programming and Scripting
I have a file with a list of config files numbered on the lefthand side 1-300. I need to have bash read each lines number and assign it to a variable so it can be chosen by the user called by the script later.
Ex. 1 some data
2 something else
3 more stuff
which number do you... (1 Reply)
Discussion started by: glev2005
1 Replies
7. Shell Programming and Scripting
Hello
Wondering if anybody can advise me how I can sort the below file so it only displays lines with the latest versions of an object? As you'll see some of the scripts listed in my file have more than one version number (version number is after the file extension). E.g. cdm_bri.pkb has... (2 Replies)
Discussion started by: Glyn_Mo
2 Replies
8. UNIX for Advanced & Expert Users
Hi all
Thanks in advance...........
Please help me for this issue............
I have a file it has 11 records . I used the command like ....
>$ wc -l file
11 file
I'm getting output like 11 file (no.of records along with filename)
here my requirement is, I want to display only... (3 Replies)
Discussion started by: ksrivani
3 Replies
9. Shell Programming and Scripting
awk 'BEGIN{IGNORECASE=1} /error|warning|exception/ { ++x } END { print x }' filename
The above command returning the number of times the pattern present in the file. But I want the the line number as well. please help me out (6 Replies)
Discussion started by: arukuku
6 Replies
10. Shell Programming and Scripting
Hi Guys,
I want to echo last 5 lines of a file to a mail. My script getting continuously looped and not getting the output. can anyone help?
#!/bin/bash
read karthick;
tail -5 $karthick;
echo $karthick | mail -s "genius" someone@gmail.com
Thanks
NK (2 Replies)
Discussion started by: Karthick N
2 Replies
LEARN ABOUT MOJAVE
universal::require
UNIVERSAL::require(3) User Contributed Perl Documentation UNIVERSAL::require(3)
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>
Now maintained by Neil Bowers (NEILB).
SEE ALSO
Module::Load, "require" in perlfunc, <http://dev.perl.org/rfc/253.pod>
perl v5.18.2 2013-09-27 UNIVERSAL::require(3)