[root@shou shou]# shou1=ceo

[root@shou shou]# ceo=123456

[root@shou shou]# echo ${!shou1}

123456

[root@shou shou]# eval echo \$$shou1

123456

[root@96 ~]#n=10

[root@96 ~]#echo {1..$n}

{1..10}

[root@96 ~]#eval echo {1..$n}

1 2 3 4 5 6 7 8 9 10