awk -F 不区分大小写
时间: 2023-11-17 10:01:25 浏览: 47
根据提供的引用内容,没有提到awk -F 不区分大小写。实际上,awk -F是用来指定分隔符的选项,而不是用来区分大小写的。默认情况下,awk是区分大小写的。如果需要进行不区分大小写的匹配,可以使用awk的内置函数tolower()或toupper()将字符串转换为小写或大写,然后进行匹配。例如,可以使用以下命令将文件中的所有单词转换为小写并进行匹配:
```
awk '{print tolower($0)}' file.txt | grep "keyword"
```
相关问题
awk -f
`awk -f` 是一个命令行工具,用于执行 AWK 脚本。AWK 是一种文本处理工具,常用于处理文本数据,例如从文件中提取特定信息、转换格式、计算统计数据等。`-f` 参数后面跟着 AWK 脚本的文件名,可以把脚本文件作为参数传递给 `awk` 命令来执行脚本。例如:
```
awk -f script.awk data.txt
```
这条命令会执行 `script.awk` 脚本,并在 `data.txt` 文件上执行脚本中的命令。
linux awk -F
The "-F" option in the awk command is used to specify the field separator. This option tells awk to split input lines into fields using the specified delimiter. For example, if we have a comma-separated file, we can use "-F," to tell awk to treat commas as the field separator.
Syntax:
awk -F<delimiter> '{<action>}' <filename>
Example:
Consider the following file "employees.txt" which contains information about employees in a company:
John,Doe,35,Male,Manager
Jane,Smith,28,Female,Engineer
Mark,Johnson,42,Male,Developer
Emily,Davis,23,Female,Intern
To print the first name of each employee, we can use the following command:
awk -F, '{print $1}' employees.txt
Output:
John
Jane
Mark
Emily
In this example, we used "-F," to specify that the fields in our input file are separated by commas. The "{print $1}" action tells awk to print the first field of each line.