Re: essential basic command
From: Lew Pitcher (Lew.Pitcher_at_td.com)
Date: 10/11/05
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Date: Tue, 11 Oct 2005 10:34:19 -0400
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Hendrik Maryns wrote:
> Shadus schreef:
>
>> On 2005-10-11, Lorne Bradley <ltbradley@rogers.com> blabbed:
>>
>>> Hi, As an old Windows user, I have the most basic command line question.
>>> How do you RUN a program and and open a file?
[snip]
>> In notepad you [ALT]FO to open a file.
[snip]
> To answer
> that question, you have to know what kind of file it is, and with which
> program it should be opened. Then you invoke this program with the file
> as an argument. For example to open example.pdf:
>
> acroread example.pdf
>
> or something.unknown_extension but you think it is a text file:
To determine what sort of data is contained in the file, use the file(1)
command ("man 1 file")
pitchl@srdscs05:~/Documentation/PDF Files$ file bourne_shell.pdf
bourne_shell.pdf: PDF document, version 1.2
pitchl@srdscs05:~/download/fl$ file flowchart.tar.gz
flowchart.tar.gz: gzip compressed data, from Unix
pitchl@srdscs05:~/www$ file login.php
login.php: PHP script text
pitchl@srdscs05:~/www$ file index.html
index.html: HTML document text
pitchl@srdscs05:~/images$ file CLOUD.GIF
CLOUD.GIF: GIF image data, version 89a, 75 x 60
- From there, choose the application you want to use to manipulate the
file. For the Windows user, here's a hint: there is more than one
program that can "open" the file ("open" in the MSWindows sense of
natively manipulate the contents of the file); you have to select which
program is apropos for your use.
pitchl@srdscs05:~/images$ apropos gif
Data::Dumper (3) - stringified perl data structures, suitable
for both printing and eval
argz_stringify [argz_add] (3) - functions to handle an argz list
gif2tiff (1) - create a TIFF file from a GIF87 format
image file
giftopnm (1) - convert a GIF file into a portable anymap
ppmtogif (1) - convert a portable pixmap into a GIF file
pitchl@srdscs05:~/images$ apropos html
CGI::Pretty (3) - module to produce nicely formatted HTML
code
Pod::Html (3) - module to convert pod files to HTML
enscript (1) - convert text files to PostScript, HTML,
RTF, ANSI, and overstrikes
grohtml (1) - html driver for groff
man2html (1) - format a manual page in html
pod2html (1) - convert .pod files to .html files
xfhelp (1) - lauches an HTML browser to display online
documentation for The Cholesterol Free
Desktop Environment
You can use the apropos(1) command ("man 1 apropos") to query the help
file ("man pages") for tools (commands, files, modules, etc.) that have
something to do with a specific keyword. In the case of commands, you
want those entries that come from section 1 ( "(1)" ) or section 8 (
"(8)" ) of the man pages.
- --
Lew Pitcher, IT Specialist, Enterprise Data Systems
Enterprise Technology Solutions, TD Bank Financial Group
(Opinions expressed here are my own, not my employer's)
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