[root@localhost ~]# mount -t udf CentOS-6.5-i386-bin-DVD1.iso /media/iso -o loop mount: wrong fs type, bad option, bad superblock on /dev/loop0, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so [root@localhost ~]# echo $? 127 [root@localhost ~]# mount -t iso9660 CentOS-6.5-i386-bin-DVD1.iso /media/iso...