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Top Forums UNIX for Dummies Questions & Answers installing softwares and utilities in unix Post 302217135 by era on Tuesday 22nd of July 2008 03:11:17 AM
Old 07-22-2008
Many modern U*x platforms have a package management system like rpm, deb, emerge, pkg, etc. Which one to use depends on your platform.

Traditionally, you would download a .tar.gz of source code, and build your own software from source. Many open-source projects are distributed in this form if you get them straight from their web site. Customarily you would extract the tar, and run something like "make install" in the extracted directory. This obviously fails unless you have the required software development tools (usually at least a C compiler and Make).
 
Test Your Knowledge in Computers #914
Difficulty: Medium
In bash, grep -v -e '^[[:space:]]*$' file.txt will filter all the blank lines from file.txt and save the results in a file called file.txt.
True or False?

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Text::Tabs(3pm) 					 Perl Programmers Reference Guide					   Text::Tabs(3pm)

NAME
Text::Tabs -- expand and unexpand tabs per the unix expand(1) and unexpand(1) SYNOPSIS
use Text::Tabs; $tabstop = 4; # default = 8 @lines_without_tabs = expand(@lines_with_tabs); @lines_with_tabs = unexpand(@lines_without_tabs); DESCRIPTION
Text::Tabs does about what the unix utilities expand(1) and unexpand(1) do. Given a line with tabs in it, expand will replace the tabs with the appropriate number of spaces. Given a line with or without tabs in it, unexpand will add tabs when it can save bytes by doing so (just like "unexpand -a"). Invisible compression with plain ASCII! EXAMPLE
#!perl # unexpand -a use Text::Tabs; while (<>) { print unexpand $_; } Instead of the "expand" comand, use: perl -MText::Tabs -n -e 'print expand $_' Instead of the "unexpand -a" command, use: perl -MText::Tabs -n -e 'print unexpand $_' LICENSE
Copyright (C) 1996-2002,2005,2006 David Muir Sharnoff. Copyright (C) 2005 Aristotle Pagaltzis This module may be modified, used, copied, and redistributed at your own risk. Publicly redistributed modified versions must use a different name. perl v5.16.2 2012-10-25 Text::Tabs(3pm)

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