unknown filesystem type ‘iso9660’类型问题

1、[root@byrd ~]# cat /proc/filesystems nodev 衡痕贤伎sysfsnodev rootfsnodev bdevnodev procnodev cgroupnodev cpusetnodev tmpfsnodev devtmpfsnodev binfmt_miscnodev debugfsnodev securityfsnodev sockfsnodev usbfsnodev pipefsnodev anon_inodefsnodev inotifyfsnodev devptsnodev ramfsnodev hugetlbfs iso9660nodev pstorenodev mqueuenodev selinuxfs ext4

2、如果/proc/filesystems中恰好没有iso9660的时候，会导致提示刚刚的错误。

3、[root@byrd ~]# yum upgrade