cut character interception
cut [options] filename
选项
-f 列号： 提取第几列
-d 分割符：按照指定的分隔符分割列Tabs ("tab") are used for splitting by default
ssgao:Downloads aouo$ cut -f 2 ssgao.txt 获取第列
ssgao
ssgao:Downloads aouo$ cut -f 2,4 ssgao.txt 获取第4列
ssgao 37Use custom delimiter
ssgao:Downloads aouo$ cat ssgao.txt
name,ssgao,age,37
ssgao:Downloads aouo$ cut -f 1 -d "," ssgao.txt #使用","进行分割，并获取第一列，-f和-d的前后顺序可以互换
name
ssgao:Downloads aouo$ Disadvantages of cut command
很复杂的分割，比如df -h 输出的的时候有多个空格
ssgao:Downloads aouo$ df -h
Filesystem Size Used Avail Capacity iused ifree %iused Mounted on
/dev/disk1 233Gi 80Gi 153Gi 35% 1054436 4293912843 0% /
devfs 182Ki 182Ki 0Bi 100% 631 0 100% /dev
map -hosts 0Bi 0Bi 0Bi 100% 0 0 100% /net
map auto_home 0Bi 0Bi 0Bi 100% 0 0 100% /home