我的示例字符串位于txt文件/www/meteo/last.txt：
<nav class="navbar navbar-default navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<button class="navbar-toggle collapsed" aria-expanded="false" aria-controls="navbar" type="button" data-toggle="collapse" data-target="#navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Project name</a>
</div>
<div class="navbar-collapse collapse" id="navbar">
<ul class="nav navbar-nav">
<li class="active"><a href="#">Home</a></li>
<li><a href="#about">About</a></li>
<li><a href="#contact">Contact</a></li>
<li class="dropdown">
<a class="dropdown-toggle" role="button" aria-expanded="false" aria-haspopup="true" href="#" data-toggle="dropdown">Dropdown <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li class="divider" role="separator"></li>
<li class="dropdown-header">Nav header</li>
<li><a href="#">Separated link</a></li>
<li><a href="#">One more separated link</a></li>
</ul>
</li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li><a href="../navbar/">Default</a></li>
<li><a href="../navbar-static-top/">Static top</a></li>
<li class="active"><a href="./">Fixed top <span class="sr-only">(current)</span></a></li>
</ul>
</div><!--/.nav-collapse -->
</div>
</nav>
<!--This should not cover up the navbar-->
<nav class="navbar navbar-default navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<button class="navbar-toggle collapsed" aria-expanded="false" aria-controls="navbar" type="button" data-toggle="collapse" data-target="#navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Toolbar</a>
</div>
<div class="navbar-collapse collapse" id="navbar">
<ul class="nav navbar-nav">
<li class="active"><a href="#">Item 1</a></li>
<li><a href="#about">Item 2</a></li>
<li><a href="#contact">Item 3</a></li>
</ul>
</div><!--/.nav-collapse -->
</div>
</nav>
我想从该文件中逐行获取3个数字到新文件。 （这些值是温度所以它们随时间变化 - 每10分钟一次）
新文件/www/meteo/new.txt :(逐行）
a:3:{i:0;s:4:"6.13";i:1;s:5:"19.94";i:2;s:5:"22.13";}答案 0 :(得分：0)
试试这个awk方法
awk -F'"' 'BEGIN{OFS="\n"} {print $2,$4,$6}' last.txt > new.txt
<强>输出：
cat new.txt
6.13
19.94
22.13
答案 1 :(得分：0)
或者，如果您想使用sed或grep：
sed -r 's/([^"]*)("[^"]*")([^"]*)/\2\n/g;s/"//g' /www/meteo/last.txt
grep -Eo '"[^"]*"' /www/meteo/last.txt | sed 's/"//g'
如果您想要一个特定值，请说出引号中的第二个温度，您可以使用sed：
grep -Eo '"[^"]*"' /www/meteo/last.txt | sed -n '2p'