擅长:python、mysql、java
<p>您可以使用<code>awk</code>这样做:</p>
<pre><code>$ awk -F, '{for(i=2;i<=NF;i++) print $1","$i}' file > new_file
$ cat new_file
allendata,test@test.com
allendata,test1@test.com
allendata2,test1@test.com
allendata2,test@test.com
allendata2,test3@test.com
</code></pre>