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    <p>Try <a href="http://man7.org/linux/man-pages/man1/tail.1.html" rel="noreferrer">GNU tail</a>:</p> <pre><code>tail -n +2 "$FILE" </code></pre> <p><code>-n x</code>: Just print the last <code>x</code> lines. <code>tail -n 5</code> would give you the last 5 lines of the input. The <code>+</code> sign kind of inverts the argument and make <code>tail</code> print anything but the first <code>x-1</code> lines. <code>tail -n +1</code> would print the whole file, <code>tail -n +2</code> everything but the first line, etc.</p> <p>GNU <code>tail</code> is much faster than <code>sed</code>. <code>tail</code> is also available on BSD and the <code>-n +2</code> flag is consistent across both tools. Check the <a href="https://www.freebsd.org/cgi/man.cgi?query=tail" rel="noreferrer">FreeBSD</a> or <a href="https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/tail.1.html" rel="noreferrer">OS X</a> man pages for more. </p> <p>The BSD version can be much slower than <code>sed</code>, though. I wonder how they managed that; <code>tail</code> should just read a file line by line while <code>sed</code> does pretty complex operations involving interpreting a script, applying regular expressions and the like.</p> <p>Note: You may be tempted to use</p> <pre><code># THIS WILL GIVE YOU AN EMPTY FILE! tail -n +2 "$FILE" &gt; "$FILE" </code></pre> <p>but this will give you an <strong>empty file</strong>. The reason is that the redirection (<code>&gt;</code>) happens before <code>tail</code> is invoked by the shell:</p> <ol> <li>Shell truncates file <code>$FILE</code></li> <li>Shell creates a new process for <code>tail</code></li> <li>Shell redirects stdout of the <code>tail</code> process to <code>$FILE</code></li> <li><code>tail</code> reads from the now empty <code>$FILE</code></li> </ol> <p>If you want to remove the first line inside the file, you should use:</p> <pre><code>tail -n +2 "$FILE" &gt; "$FILE.tmp" &amp;&amp; mv "$FILE.tmp" "$FILE" </code></pre> <p>The <code>&amp;&amp;</code> will make sure that the file doesn't get overwritten when there is a problem.</p>
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    1. POHow can I remove the first line of a text file using bash/sed script?
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    1. POHow can I remove the first line of a text file using bash/sed script?
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    1. COIt doesn't work with lines of 15Mb or more
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    2. CO@user: Interesting point. Where did you get the number?
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      1. USAaron Digulla
    3. COAccording to this http://ss64.com/bash/tail.html the typical buffer defaults to 32k when using BSD 'tail' with the `-r` option. Maybe there's a buffer setting somewhere in the system? Or `-n` is a 32-bit signed number?
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