advanced: fix header and pre tag usage

git-svn-id: svn+ssh://atelier.inf.usi.ch/home/bevilj/group-1@105 a672b425-5310-4d7a-af5c-997e18724b81

site/pages/cmd/advanced/grep.html

@@ -1,9 +1,8 @@
 ---
 layout: page
-topic: The grep command
 author: Domenico Votta
-category_title: Advanced Commands
-category_page: Advanced
+category-page: advanced
+category-title: Advanced commands
 tags: search for occurences
 title: grep
 ---
@@ -11,7 +10,7 @@ title: grep
 Here we have two files named <code>example1.txt</code> and <code>example2.txt</code> that contain 5 elements, to test this command:
 
 <code>example1.txt</code>
-{% highlight ruby linenos %}
+{% highlight bash linenos %}
 Car
 Computer
 Robot
@@ -20,7 +19,7 @@ Videogame
 {% endhighlight %}
 
 <code>example2.txt</code>
-{% highlight ruby linenos %}
+{% highlight bash linenos %}
 Apple
 Computer
 Robot
@@ -44,14 +43,14 @@ example2.txt: Robot
 
 <ul>
   <li> <b>-i</b>: this flag ignore the case sensitive. Here we can write Robot or robot that grep will find the correspondence. </li>
-  {% highlight ruby linenos %}
+<pre>
 grep -i robot example1.txt example2.txt
 example1.txt: Robot
 example2.txt: Robot
-  {% endhighlight %}
+</pre>
 
   <li> <b>-v</b>: this flag ignore the keyword from the search. </li>
-  {% highlight ruby linenos %}
+<pre>
 grep -i -v robot example1.txt example2.txt
 example1.txt:Car
 example1.txt:Computer
@@ -61,20 +60,20 @@ example2.txt:Apple
 example2.txt:Computer
 example2.txt:Microsoft
 example2.txt:Huawei
-  {% endhighlight %}
+</pre>
 
   <li> <b>-c</b>: this flag indicates the number of times that the keyword appears in the file. </li>
-  {% highlight ruby linenos %}
+<pre>
 grep -i -c robot example1.txt
 1
-  {% endhighlight %}
+</pre>
 <p> If in the file you would have had two times the keyword Robot, the output would have been 2</p>
 
 <li> <b>-h</b>: Remove from the output the file name where it found the keyword</li>
-{% highlight ruby linenos %}
+<pre>
 grep -i -h apple example1.txt example2.txt
 Apple
-{% endhighlight %}
+</pre>
 <p>How you can see the output doesn't show tha file name <code>example2.txt</code></p>
 </ul>
 

site/pages/cmd/advanced/nl.html

@@ -1,15 +1,14 @@
 ---
 layout: page
-topic: The nl command
 author: Domenico Votta
-category_title: Advanced Commands
-category_page: Advanced
-tags: number lines
+category-page: advanced
+category-title: Advanced commands
+tags: number lines count
 title: nl
 ---
 <p>The <code>nl</code>  is a command that permits to number the lines. Through some flags you can decide how to filter this command.</p>
 We have a file named <code>example.txt</code> that contains 5 elements, to test this command:
-{% highlight ruby linenos %}
+{% highlight bash linenos %}
 Car
 Computer
 Robot
@@ -20,14 +19,14 @@ Videogame
 The syntax command is:
 <pre> nl [flags][file] </pre>
 
-{% highlight ruby linenos %}
+<pre>
 nl example.txt
  1  Car
  2  Computer
  3  Robot
  4  Smartphone
  5  Videogame
-{% endhighlight %}
+</pre>
 <p>How you can see the command has numbered the lines.</p>
 
 <h2>Flags</h2>
@@ -36,35 +35,35 @@ nl example.txt
 <ul>
 
   <li> <b>-b</b>: Specify the lines to be numered </li>
-  {% highlight ruby linenos %}
+<pre>
 nl -b p^[cv] example.txt
    1  Car
    2  Computer
    3  Videogame
       Robot
       Smartphone
-  {% endhighlight %}
+</pre>
   <p> <code>p^[cv]</code> says to nl to number only the lines that start with c and v.</p>
 
   <li> -b<b>n</b>: The flag n goes with b, doesn't number any lines </li>
-  {% highlight ruby linenos %}
+<pre>
 nl -bn example.txt
      Car
      Computer
      Videogame
      Robot
      Smartphone
-  {% endhighlight %}
+</pre>
 
   <li> <b>-s</b>: Usually nl separes the number of the line from the text with a tab, with -s flag you can choose another separator, in this example we will use "=". </li>
-  {% highlight ruby linenos %}
+<pre>
 nl -s= example.txt
    1=Car
    2=Computer
    3=Videogame
    4=Robot
    5=Smartphone
-  {% endhighlight %}
+</pre>
 
 </ul>
 </p>

site/pages/cmd/advanced/pipes.html

@@ -1,29 +1,28 @@
 ---
 layout: page
-topic: The pipes command
 author: Domenico Votta
-category_title: Advanced Commands
-category_page: Advanced
-tags: pipes
+category-page: advanced
+category-title: Advanced commands
+tags: pipes redirect output input
 title: pipes
 ---
 
 <p>The <code>pipes</code> that in the shell are representend with the symbol | , they are used to join two commands on the terminal, taking the output of the first command and using it as input of the second. </p>
 <p> It is usually common to see the command grep and ps together, an example below.</p>
 
-{% highlight ruby linenos %}
+<pre>
 ps aux | grep user
-{% endhighlight %}
+</pre>
 <p>Lists all processes with your username</p>
 
-{% highlight ruby linenos %}
+<pre>
 cat example1.txt | nl
   1  Car
   2  Computer
   3  Robot
   4  Smartphone
   5  Videogame
-{% endhighlight %}
-<p>In this example you send this output to another process, in this case, the <a href="nl.html">nl</a> </p>
+</pre>
+<p>In this example you send this output to another process, in this case, the <a href="{{ site.baseurl }}/pages/cmd/advanced/nl.html">nl</a> </p>
 
 <p>You can use the commands that you learned and put them together, always respecting the logic of the command.</p>