擅长:python、mysql、java
<p>指令方法:</p>
<pre><code>sed -E 's/\s+/\n/g' testfile
</code></pre>
<p><code>-E</code>选项,允许扩展正则表达式</p>
<hr/>
<p><strong><em>awk</em></strong>方法:</p>
^{pr2}$
<blockquote>
<p><strong><em>gsub(regexp, replacement [, target])</em></strong><br/>
Search <em>target</em> for <em>all</em> of the longest, leftmost, <em>nonoverlapping</em> matching substrings it can find and
replace them with <em>replacement</em>. The ‘<em>g</em>’ in gsub() stands for “global,”
which means replace everywhere.</p>
</blockquote>
<hr/>
<p><strong><em>grep</em></strong>方法:</p>
<pre><code>grep -o '\S*' testfile
</code></pre>
<p><code>\S*</code>-匹配所有非空白序列</p>