在Linux下正则表达式和grep命令的使用

The Use of the Regular Expression and Grep in Linux

在Linux的命令行里如何快速检索出所需数据,这对用户来说是非常重要的。查询条件需要构造正确的正则表达式,该文结合查询命令grep,介绍了相关参数和正则表达式的使用。

In Linux, it's important to retrieve the data that the user wanted in the command line. Regular expression should be correct in query conditions. On the basis of the command grep, this paper studies many parameters and introduce the use of the regular expression in example.