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很好用的指令 
在當前目錄底下(包含子目錄)尋找所有附檔名為php的檔案，並在這些檔案中，尋找包含 abc.def 字串的檔案並列出結果
find .. -name “.php”|xargs grep -n abc.def
使用結果
[root@vm00015-1 models]# find .. -name “.php”|xargs grep -n abc.def../views/welcome.php:252: <span><a href=”http://abc.def.com" target=”_blank”>設計</a></span>
../views/welcome.php:260: <span><a href=”http://abc.def.com" target=”_blank”></a></span>
../views/welcome.php:263: <span><a href=”http://abc.def.com" target=”_blank”></a></span>
../views/mobile.php:127: <span><a href=”http://abc.def.com" target=”_blank”>設計</a></span>
../views/mobile.php:130: <span><a href=”http://abc.def.com" target=”_blank”></a></span>
../views/mobile.php:133: <span><a href=”http://abc.def.com" target=”_blank”></a></span>
../views/template.php:165: <span><a href=”http://abc.def.com" target=”_blank”>設計</a></span>
../views/template.php:168: <span><a href=”http://abc.def.com" target=”_blank”></a></span>
../views/template.php:171: <span><a href=”http://abc.def.com" target=”_blank”></a></span>
../views/admin/panel.php:81: <a href = “http://abc.def.com" target=”_blank”>
../views/admin/login.php:81: <a href = “http://abc.def.com" target=”_blank”>
../views/contact/locations.php:74: icon: “http://abc.def.com/img/flag.png"
[root@vm00015-1 models]#