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git-svn-id: svn+ssh://atelier.inf.usi.ch/home/bevilj/group-1@247 a672b425-5310-4d7a-af5c-997e18724b81
59 lines
2.1 KiB
HTML
59 lines
2.1 KiB
HTML
---
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layout: page
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author: Agostino Monti
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category-page: advanced
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category-title: Advanced commands
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tags: filie coluns analize
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title: paste
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---
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<br>
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<br>
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<p><code>paste</code> is a Unix command line utility which is used to join files horizontally
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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.
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Once involved, <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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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.</p>
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<h3><code>cat</code></h3>
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<p><code>cat</code> is a standard Unix utility that reads files sequentially, writing them to standard output.
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The name is derived from its function to con<code>cat</code>enate files.</p>
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<h4>Examples</h4>
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<p><pre>
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paste file1.txt file2.txt <br>
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cat fail1.txt fail2.txt</pre></p>
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<h3>flags</h3>
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<ul>
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<li><code>-d</code> delimiters, which specifies a list of delimiters to be used instead of tabs
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for separating consecutive values on a single line. Each delimiter is used in turn;
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when the list has been exhausted, paste begins again at the first delimiter.
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<h4>Examples</h4>
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<pre>
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paste -d "|" file1.txt file2.txt
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paste -d "|," file1.txt file2.txt</pre></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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that is, in a horizontal rather than vertical fashion.
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<h4>Examples</h4>
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<pre>
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paste -s file1.txt file2.txt</pre></li>
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<li><code>-u</code> is one option flag, <code>-u</code> for unbuffered output,
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meaning that each byte is written after it has been read.
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<h4>Examples</h4>
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<pre>
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cat -u file1.txt file2.txt</pre></li>
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<li><code>-n</code> this option numbers all output lines
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<h4>Examples</h4>
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<pre>
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cat -n file1.txt
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cat -n file1.txt file2.txt</pre></li>
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</ul>
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