從shell腳本中的文件中提取特定模式

Question

我嘗試從文件中提取特定模式。文件內容：

--------some other command in here---------- 
<tr> 
<td>someWords</td> 
<td>anotherWords</td> 
</tr> 
--------some other command in here----------- 
the <tr>...</tr> patter occur again 

我嘗試從shell腳本文件

提取TR模式我寫：

讀取輸入

grep '<tr>\n<td>[A-Za-z0-9,<,>,/]</td>\n<td>[A-Za-z0-9,<,>,/]</td>\n</tr> 

但是，此命令犯規工作。任何想法？ THX

Answer 1

sed -n '/<tr>/,/<\/tr>/p' file 

見例如：

kent$ cat a      
--------some other command in here---------- 
<tr> 
<td>someWords</td> 
<td>anotherWords</td> 
</tr> 
--------some other command in here----------- 
the 
<tr> 
<td>someOtherWords</td> 
<td>anotherWords2</td> 
</tr> 

kent$ sed -n '/<tr>/,/<\/tr>/p' a 
<tr> 
<td>someWords</td> 
<td>anotherWords</td> 
</tr> 
<tr> 
<td>someOtherWords</td> 
<td>anotherWords2</td> 
</tr>