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<h1>sed使用 <small></small></h1>
<div class="date"><span>03 November 2009</span></div>
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<li><a href="/tags.html#sed-ref">sed <span>2</span></a></li>
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<div style='background-color: #FFF;'>
<p>shell这东西,只有活逼到手头上了,才知道应该去学什么。
比如有客户要求修改/home/squid/share/errors/Simplify_Chinese/里所有的错误页面转向到他们自己专用的界面去,七八个节点,几十台服务器,几百个文件,一个一个vi编辑,多可怕。只好现学现卖sed,目前发现两种办法:</p>
<p>1、find+sed
比如这样:
find . -name “*.html” -exec sed -i “s/eht/the/g” {} ;
用exec传输find的结果给sed,{}是集合的意思;</p>
<p>2、sed+grep
比如这样:
sed -i “s/eht/the/g” <code>grep eht -rl /test</code>
这个-rl参数,有时间研究一下。</p>
<p>或者这样:
grep “abc” * -R | awk -F: ‘{print $1}’ | sort | uniq | xargs sed -i ‘s/abc/abcde/g’</p>
<p>awk -F:的意思是指定:为列的分隔符,sort排序,uniq删除重复行,最后用xargs传输大量数据给sed。</p>
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<td>说到xargs,比如曾经有一次/var/spool/clientmqueue目录占用了大量磁盘空间,但其中的文件都是4.0K,数量及其多,单纯用rm,无法达到目的,就得用ls</td>
<td>xargs rm -f才行。</td>
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