You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
|
|
|
egrep
|
|
|
|
|
|
===
|
|
|
|
|
|
|
|
|
|
|
|
在文件内查找指定的字符串
|
|
|
|
|
|
|
|
|
|
|
|
## 补充说明
|
|
|
|
|
|
|
|
|
|
|
|
**egrep命令** 用于在文件内查找指定的字符串。egrep执行效果与`grep -E`相似，使用的语法及参数可参照grep指令，与grep的不同点在于解读字符串的方法。egrep是用extended regular expression语法来解读的，而grep则用basic regular expression 语法解读，extended regular expression比basic regular expression的表达更规范。
|
|
|
|
|
|
|
|
|
|
|
|
### 语法
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
egrep(选项)(查找模式)(文件名1，文件名2，……)
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
### 实例
|
|
|
|
|
|
|
|
|
|
|
|
显示文件中符合条件的字符。例如，查找当前目录下所有文件中包含字符串"Linux"的文件，可以使用如下命令：
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
egrep Linux *
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
结果如下所示：
|
|
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
|
#以下五行为 testfile 中包含Linux字符的行
|
|
|
|
|
|
testfile:hello Linux!
|
|
|
|
|
|
testfile:Linux is a free Unix-type operating system.
|
|
|
|
|
|
testfile:This is a Linux testfile!
|
|
|
|
|
|
testfile:Linux
|
|
|
|
|
|
testfile:Linux
|
|
|
|
|
|
|
|
|
|
|
|
#以下两行为testfile1中含Linux字符的行
|
|
|
|
|
|
testfile1:helLinux!
|
|
|
|
|
|
testfile1:This a Linux testfile!
|
|
|
|
|
|
|
|
|
|
|
|
#以下两行为 testfile_2 中包含Linux字符的行
|
|
|
|
|
|
testfile_2:Linux is a free unix-type opterating system
|
|
|
|
|
|
testfile_2:Linux test
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<!-- Linux命令行搜索引擎：https://jaywcjlove.github.io/linux-command/ -->
|
