/var/spool/mail/root: Permission denied

[root@kerry ~]# su kerry

[google@kerry root]$ mail

/var/spool/mail/root: Permission denied

[atyu@kerry root]$ exit

exit

[root@kerry ~]# su - kerry

[atyu@kerry ~]$ mail

Mail version 8.1 6/6/93.  Type ? for help.

"/var/spool/mail/google": 2 messages 2 new

>N  1 [email protected]  Mon Sep 10 13:38  80/2616  "Undelivered Mail Returned to Sender"

 N  2 [email protected]  Mon Sep 10 13:45  19/658   "IBM"

&

收到邮件了

#su - username 携带环境变量

#su username 只是切换用户，但是环境变量还是之前用户的