擅长:python、mysql、java
<p>这个文件不使用readlines(),所以它非常适合大文件。</p>
<pre><code>numline=3 #3 lines to skip
p=""
o=open("output.txt","a")
f=open("file")
for i in range(numline):
f.next()
for line in f:
if p:
o.write(p)
p=line
f.close()
o.close()
</code></pre>
<p>既然有一个sed答案,这里就有一个awk答案</p>
<pre><code>$ awk 'NR>=4{if(p)print p;p=$0;}' file
Fourth Line
Fifth Line
</code></pre>