详细介绍Linux中的通配符

[root@localhost ~]# mkdir dy

[root@localhost ~]# cd dy

[root@localhost dy]# touch dzp dzp2 dzp3 dzp34 dzpcang dzpbols

[root@localhost dy]# ls

dzp dzp2 dzp3 dzp34 dzpbols dzpcang

[root@localhost dy]# la dzp

bash: la: command not found...

[root@localhost dy]# ls dzp

dzp

[root@localhost dy]# ls dzp*

dzp dzp2 dzp3 dzp34 dzpbols dzpcang

[root@localhost dy]# ls dzp?

dzp2 dzp3

[root@localhost dy]# ls dzp[0-9]

dzp2 dzp3

[root@localhost dy]# ls dzp[0-9][0-9]

dzp34

[root@localhost dy]# ls dzp[^0-9]

ls: cannot access dzp[^0-9]: No such file or directory

[root@localhost dy]# touch dzpa

[root@localhost dy]# ls dzp[^0-9]

dzpa

[root@localhost dy]# ls dzp[^0-9]*

dzpa dzpbols dzpcang

[root@localhost dy]# echo ls

ls

[root@localhost dy]# echo dzp

dzp

[root@localhost dy]# aa=123

[root@localhost dy]# echo $aa

123

[root@localhost dy]# echo '$aa'

$aa

[root@localhost dy]# echo "$aa"

123

[root@localhost dy]# aa=ls

[root@localhost dy]# echo "$aa"

ls

[root@localhost dy]# aa=`ls`

[root@localhost dy]# echo "$aa"

dzp

dzp2

dzp3

dzp34

dzpa

dzpbols

dzpcang

[root@localhost dy]# bb=$(ls)

[root@localhost dy]# echo $bb

dzp dzp2 dzp3 dzp34 dzpa dzpbols dzpcang

[root@localhost dy]# echo $(date)

Sat Jul 15 17:23:31 CST 2017

[root@localhost dy]# echo \$bb

$bb