字符截取：cut

Posted 2020-10-02 xiongjiawei

cut 选项 文件名

-f 列号　　提取第几列

-d 分隔符　　指定分隔符把行分成多列

[[email protected] ~]# cat testfile
no.     name    sex     score
1       zhangsan        m       88
2       lisi    f       89
3       wangwu  m       87
[[email protected] ~]# cut -f 2 testfile　　注释：默认分隔符是制表符\t
name
zhangsan
lisi
wangwu
[[email protected] ~]# cut -f 2,4 testfile
name    score
zhangsan        88
lisi    89
wangwu  87

[[email protected] ~]# cat testfile
no.     na:me   sex     sco:re
1       zhang:san       m       8:8
2       li:si   f       8:9
3       wang:wu m       8:7
[[email protected] ~]# cut -f 1,3 -d : testfile
no.     na:re
1       zhang:8
2       li:9
3       wang:7

 

[email protected] ~]# cut -f 1 -d : /etc/passwd|grep xiong
xiongjiawei
[[email protected] ~]# grep xiong /etc/passwd|cut -d : -f 1
xiongjiawei
[[email protected] ~]# grep xiong /etc/passwd|cut -d ":" -f 1
xiongjiawei
[[email protected] ~]# grep xiong /etc/passwd|cut -f 1 -d :
xiongjiawei
[[email protected] ~]# grep xiong /etc/passwd|cut -f 1 -d ":" 
xiongjiawei