Linux and UNIX Man Pages

Test Your Knowledge in Computers #221
Difficulty: Easy
Apple's OS X (macOS) installed base had grown to 80 million users as reported at the WWDC 2014.
True or False?
Linux & Unix Commands - Search Man Pages

filter::exec(3) [redhat man page]

Filter::exec(3) 					User Contributed Perl Documentation					   Filter::exec(3)

Filter::exec - exec source filter SYNOPSIS
use Filter::exec qw(command parameters) ; DESCRIPTION
This filter pipes the current source file through the program which corresponds to the "command" parameter. As with all source filters its scope is limited to the current source file only. Every file you want to be processed by the filter must have a use Filter::exec qw(command ) ; near the top. Here is an example script which uses the filter: use Filter::exec qw(tr XYZ PQR) ; $a = 1 ; print "XYZ a = $a " ; And here is what it will output: PQR = 1 WARNING
You should be very careful when using this filter. Because of the way the filter is implemented it is possible to end up with deadlock. Be especially careful when stacking multiple instances of the filter in a single source file. AUTHOR
Paul Marquess DATE
11th December 1995. perl v5.8.0 2003-01-27 Filter::exec(3)

Check Out this Related Man Page

Web::Scraper::Filter(3pm)				User Contributed Perl Documentation				 Web::Scraper::Filter(3pm)

Web::Scraper::Filter - Base class for Web::Scraper filters SYNOPSIS
package Web::Scraper::Filter::YAML; use base qw( Web::Scraper::Filter ); use YAML (); sub filter { my($self, $value) = @_; YAML::Load($value); } 1; use Web::Scraper; my $scraper = scraper { process ".yaml-code", data => [ 'TEXT', 'YAML' ]; }; DESCRIPTION
Web::Scraper::Filter is a base class for text filters in Web::Scraper. You can create your own text filter by subclassing this module. There are two ways to create and use your custom filter. If you name your filter Web::Scraper::Filter::Something, you just call: process $exp, $key => [ 'TEXT', 'Something' ]; If you declare your filter under your own namespace, like 'MyApp::Filter::Foo', process $exp, $key => [ 'TEXT', '+MyApp::Filter::Foo' ]; You can also inline your filter function without creating a filter class: process $exp, $key => [ 'TEXT', sub { s/foo/bar/ } ]; Note that this function munges $_ and returns the count of replacement. Filter code special cases if the return value of the callback is number and $_ value is updated. You can, of course, stack filters like: process $exp, $key => [ '@href', 'Foo', '+MyApp::Filter::Bar', &baz ]; AUTHOR
Tatsuhiko Miyagawa perl v5.14.2 2009-03-24 Web::Scraper::Filter(3pm)

11 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Make all words begin with capital letter?

I need to use bash to convert sentences where all words start with a small letter into one where all words start with a capital letter. So that a string like: are utilities ready for hurricane sandy becomes: Are Utilities Ready For Hurricane Sandy (10 Replies)
Discussion started by: locoroco
10 Replies

2. UNIX for Dummies Questions & Answers

How to capture ^x,^y via bash script?

Hi I am new to this forum. Any please help me to capture ctrl x and ctrl y via a bash script. and please tell me how to clear the prompt via bash script BR Ramukumar M (4 Replies)
Discussion started by: ramukumar
4 Replies

3. Red Hat

Create an unconfigured VMware host from a template that is set to do firstboot --reconfig

I have an Oracle Linux 7.1 vsphere host built. It's be preconfigured with our security configurations. What I would like to do is unconfigure this host. Then set the host to do firstboot --reconfigure. how do I do that using /etc/sysconfig/firstboot? I've tried setting ... (10 Replies)
Discussion started by: os2mac
10 Replies

4. Shell Programming and Scripting

Retrieving previous command in a script

i know from the command line, the symbol $_ is used to get the last command that was run. however, id like to replicate this within a script. meaning, how do i do something like this: #!/bin/sh ps -ef | egrep talling StoreThisLastCommandA=$_ awk '/error/ {print $3}' /tmp/test... (5 Replies)
Discussion started by: SkySmart
5 Replies

5. UNIX for Advanced & Expert Users

Tar Command

hi folks, how to using tar with exclude directory and compress it using tar.Z i only know how to exclude dir only with this command below: tar -cvf /varios/restore/test.tar -X excludefile.txt /jfma/test1/ how to compress it using 1 command? Thanx Please use CODE tags as... (6 Replies)
Discussion started by: only
6 Replies

6. UNIX for Advanced & Expert Users

CentOS7 restoring file capabilities

Quite an obscure question I think. We have a rebuild process for remote sites that allows us to PXE rebuild a till (actually a PC with a touch screen and various fancy bits) running CentOS. The current CentOS5 tills work just fine with a tar image restore and some personalisation. Sadly,... (4 Replies)
Discussion started by: rbatte1
4 Replies

7. Docker

Docker learning Phase-I

Hello All, I had recently learnt a bit of Docker(which provides containerization process). Here are some of my learning points from it. Let us start first with very basic question: What is Docker: Docker is a platform for sysadmins and developers to DEPLOY, DEVELOP and RUN applications ... (7 Replies)
Discussion started by: RavinderSingh13
7 Replies

8. UNIX for Advanced & Expert Users

Issue with "rsh" on RedHat

Hi Folks, I feel that I should be posting this in the Unix for Dummies Forum and will probably wish I'd created an account and done just that - but here goes anyway. I have two identical servers both Dell R430's both running RedHat Enterprise Server 7.4 and the same kernel, both have the same... (16 Replies)
Discussion started by: gull04
16 Replies

9. UNIX for Beginners Questions & Answers


Hi, What is installation package and how to create it? When we run: in AIX: installp package1 or in Linux rpm -ivh mypackage What is package1 or mypackage in the abov examples and how to create them and deploy them? I hope my question is clear enough. Thank you (2 Replies)
Discussion started by: big123456
2 Replies

10. UNIX for Advanced & Expert Users

Shopt -s histappend

What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file. # When the shell exits, append to the history file instead of overwriting it shopt -s histappend (3 Replies)
Discussion started by: cokedude
3 Replies

11. Shell Programming and Scripting

[TIP] Processing YAML files with yq

After the success of the jq - tool for parsing and manipulating JSON-Data someone wrote a tool called yq, which aims to be the same for YAML, what jq is for JSON. Seems to work fine. I'll definitely give it a chance in future. Example YAML-File: --- !ruby/object:Puppet::Node::Facts ... (1 Reply)
Discussion started by: stomp
1 Replies

Featured Tech Videos