Question

如何在shell中执行 字符串拼接起来的命令 c

Answer 1

[root@localhost ~]# a=123
You have new mail in /var/spool/mail/root
[root@localhost ~]# b=456
[root@localhost ~]# echo $a$b
123456
[root@localhost ~]# c=$a$b
[root@localhost ~]# echo $c
123456