小编点评

```bash #!/bin/bash # 1. Extract the first column data awk '{print $1}' filename > out.txt2 # 2. Extract the first two columns data awk '{print $1,$2}' filename > out.txt3 # 3. Print the first column and the second column awk '{print $1 $2}' filename > out.txt4 # 4. Print the total number of lines in the file awk 'END{print NR}' filename # 5. Print the first line of the file awk 'NR==1{print}' filename # 6. Print the second line of the file with the first column sed -n \"2, 1p\" filename | awk 'print $1' ```

正文

 

1、提取文件中第1列数据

awk '{print $1}' filename > out.txt

2、提取前2列的文件

awk `{print $1,$2}' filename > out.txt

3、打印完第一列，然后打印第二列 ： awk '{print $1 $2}' filename > out.txt

4、打印文本文件的总行数 ： awk 'END{print NR}' filename 

5、打印文本第一行 ：awk 'NR==1{print}' filename 

6、打印文本第二行第一列 ：sed -n "2, 1p" filename | awk 'print $1'