css-team: proofread
git-svn-id: svn+ssh://atelier.inf.usi.ch/home/bevilj/group-1@284 a672b425-5310-4d7a-af5c-997e18724b81
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@ -9,7 +9,7 @@ previous-page: pages/cmd/advanced/grep.html
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next-page: pages/cmd/advanced/nl.html
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next-page: pages/cmd/advanced/nl.html
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---
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---
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The <code>head</code> command reads the first few lines of any text given to it as an input
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The <code>head</code> command reads the first few lines of any text given to it as input
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and writes them to standard output.<br>
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and writes them to standard output.<br>
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If more than one input file is provided, head will return the first ten lines
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If more than one input file is provided, head will return the first ten lines
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from each file, precede each set of lines by the name of the file and separate
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from each file, precede each set of lines by the name of the file and separate
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@ -8,7 +8,7 @@ title: nl
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previous-page: pages/cmd/advanced/head-tail.html
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previous-page: pages/cmd/advanced/head-tail.html
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next-page: pages/cmd/advanced/paste.html
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next-page: pages/cmd/advanced/paste.html
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---
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---
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The <code>nl</code> is a command that permits to number the lines.
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<code>nl</code> is a command that allows you to number the lines.
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Through some flags you can decide how to filter this command.<br>
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Through some flags you can decide how to filter this command.<br>
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We have a file named <code>example.txt</code> that contains 5 elements, to test this command:
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We have a file named <code>example.txt</code> that contains 5 elements, to test this command:
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@ -21,7 +21,7 @@ Smartphone
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Videogame
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Videogame
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{% endhighlight %}
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{% endhighlight %}
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The syntax command is:
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The syntax is:
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<pre> nl [flags][file] </pre>
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<pre> nl [flags][file] </pre>
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<pre>
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<pre>
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@ -33,12 +33,12 @@ nl example.txt
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5 Videogame
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5 Videogame
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</pre>
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</pre>
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How you can see the command has numbered the lines.
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As you can see, the command has numbered the lines.
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<h2>Flags</h2>
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<h2>Flags</h2>
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<ul>
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<ul>
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<li> <b>-b (regex)</b>: Specify the lines to be numered
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<li> <b>-b (regex)</b>: Specify the lines to be numbered
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<pre>
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<pre>
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nl -b p^[cv] example.txt
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nl -b p^[cv] example.txt
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1 Car
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1 Car
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@ -12,7 +12,7 @@ next-page: pages/cmd/advanced/pipes.html
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The <code>paste</code> command is used to join files horizontally
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The <code>paste</code> command is used to join files horizontally
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(parallel merging) by outputting lines consisting of the sequentially corresponding
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(parallel merging) by outputting lines consisting of the sequentially corresponding
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lines of each file specified, separated by tabs, to the standard output.<br>
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lines of each file specified, separated by tabs, to the standard output.<br>
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Once involved, <code>paste</code> will read all its file arguments. For each corresponding line,
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Once invoked, <code>paste</code> will read all its file arguments. For each corresponding line,
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paste will append the contents of each file at that line to its output along with a tab.
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paste will append the contents of each file at that line to its output along with a tab.
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When it has completed its operation for the last file, <code>paste</code> will output a newline
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When it has completed its operation for the last file, <code>paste</code> will output a newline
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character and move on to the next line.
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character and move on to the next line.
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@ -31,7 +31,7 @@ paste [flags] [file1] [file2] ...
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paste -d "|" file1.txt file2.txt
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paste -d "|" file1.txt file2.txt
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paste -d "|," file1.txt file2.txt</pre>
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paste -d "|," file1.txt file2.txt</pre>
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</li>
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</li>
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<li><code>-s</code>, which causes paste to append the data in serial rather than in parallel;
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<li><code>-s</code>, which causes paste to append the data serially rather than in parallel;
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that is, in a horizontal rather than vertical fashion.
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that is, in a horizontal rather than vertical fashion.
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</li>
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</li>
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</ul>
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</ul>
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@ -9,10 +9,10 @@ previous-page: pages/cmd/advanced/paste.html
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next-page: pages/cmd/advanced/tr.html
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next-page: pages/cmd/advanced/tr.html
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---
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---
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The <code>pipes</code> that in the shell are representend with the symbol | ,
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The <code>pipes</code>, which in the shell are represented with the symbol | ,
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they are used to join two commands on the terminal, taking the output of the first
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are used to join two commands on the terminal, taking the output of the first
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command and using it as input of the second.<br>
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command and using it as input of the second.<br>
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It is usually common to see the command <code>grep</code> and <code>ps</code> together,
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It is common to see the commands <code>grep</code> and <code>ps</code> together,
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an example below.<br>
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an example below.<br>
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Example: lists all processes with your username
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Example: lists all processes with your username
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