62404808fd
git-svn-id: svn+ssh://atelier.inf.usi.ch/home/bevilj/group-1@81 a672b425-5310-4d7a-af5c-997e18724b81
52 lines
1.3 KiB
HTML
52 lines
1.3 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
|
|
</head>
|
|
|
|
|
|
<body>
|
|
<!-- Echo command text -->
|
|
<h3>Echo</h3>
|
|
<p>This command print as output its entire argument on the command-line.<br>
|
|
It could be used with variables, like in the following example:</p>
|
|
<hr>
|
|
<p>$ example:"this is an example"</p>
|
|
<br>
|
|
<p>$ <b>echo</b> $example</p>
|
|
<p>this is an example</p>
|
|
<hr>
|
|
<br>
|
|
<!-- Cat command text -->
|
|
<h3>Cat</h3>
|
|
<p>This command prints the content of a certain file as an output on the command-line.</p>
|
|
<p>As example, we could imagine a simple text file in pages named "Hello", which contains the line "Hello World".<br>
|
|
So, our command example will look like this:</p>
|
|
<hr>
|
|
<p>$ pages Hello</p>
|
|
<p>$ <b>cat</b> Hello<br>
|
|
Hello World</p>
|
|
<hr>
|
|
<br>
|
|
<!-- Grep command text -->
|
|
<h3>Grep</h3>
|
|
<p>This one behaves very similarly to the previus one, but in this case it prints only the lines matching a certain pattern.<br>
|
|
In this we could imagine a certain text file "animals", which contains a list of animal-names.</p>
|
|
<p>If we want to select only the animals whose name begins with the letter "d", we will write this:<br>
|
|
<hr>
|
|
<p>$ grep d animals<br>
|
|
Deer<br>
|
|
Dog<br>
|
|
Dolphin<br>
|
|
...
|
|
<br>
|
|
<hr>
|
|
<br>
|
|
|
|
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|