grep更适合单纯的查找或匹配文本，sed更适合编辑匹配到的文本，awk更适合格式化文本，对文本进行较复杂格式处理。 1、grep 1.1 什么是grep和egrep Linux 系统中grep命令是一种强大的文本搜索工具，它能使用正则表达式搜索文本，并把匹配的行打印出来（匹配到的标红）。

I often profess that Linux can be used without the command line, but at some point, you might want to learn it anyway. When you do, consider these commands.

The grep command offers interesting options to help you find what you want from text files. The grep command makes it easy to find strings in text files on Linux systems, but that’s just a start.

These commands wield significant power, and seem to be two of the most commonly used commands for the Ubuntu Linux command line. I mentioned ‘grep’ in passing yesterday.

The grep command can search for and list Linux files based on strings you are looking for and add the context of surrounding text.

The grep command is a handy, reliable tool for searching for files or information. This tutorial illustrates 10 ways to take advantage of its power and flexibility.