Chapter 4: Virtual Media76Virtual Media in a Linux EnvironmentFollowing is important information for Linux® users regarding using virtualmedia.Root User Permission RequirementYour virtual media connection can be closed if you mount a CD ROMfrom a Linux client to a target and then unmount the CD ROM. Theconnection also closes when a floppy drive has been mounted and thena floppy disk is removed. To avoid these issues, you must be a root user.PermissionsUsers must have the appropriate access permissions in order to connectthe Drive/CD-ROM to the target. This can be checked using:guest_user@administrator-desktop:~$ ls -l /dev/sr0brw-rw----+ 1 root cdrom 11, 12-03-2010 11:52 /dev/sr0In the above example, the permission must be changed to allow readaccess.On a system that supports ACLs in its file utilities, the ls commandchanges its behavior in the following way: For files that have a default ACL or an access ACL that containsmore than the three required ACL entries, the ls(1) utility in the longform produced by ls -l displays a plus sign ( + ) after the permissionstring.This is indicated in the example provided here for /dev/sr0, use getfacl –a /dev/sr0 to see if the user has been provided access as part of an ACL.In this case they have and are therefore able to connect the cd-rom ontothe target even though the output of the ls –l command may indicateotherwise.
