Failed to open the CD/DVD image /usr/lib/virtualbox/additions/VBoxGuestAdditions.iso.
Could not get the storage format of the medium '/usr/lib/virtualbox/additions/VBoxGuestAdditions.iso' (VERR_NOT_SUPPORTED).
Result Code: VBOX_E_IPRT_ERROR (0x80BB0005)
Component: Medium
Interface: IMedium {53f9cc0c-e0fd-40a5-a404-a7a5272082cd}
Callee: IVirtualBox {c28be65f-1a8f-43b4-81f1-eb60cb516e66}
this was the error message shown by VirtualBox , unable to install guest additions .. pls help
777 is not the magic sledgehammer to fix all permission problems.
Your "iso" file is now writable and executable by everything on the system, you should set it 660 before someone comes along and overwrites it with something nasty.
I suspect it means what it says... that your iso file is not actually an iso. What does this print to terminal? file /usr/lib/virtualbox/additions/VBoxGuestAdditions.iso
Upvan, apologies in advance for attempting to hijack your thread, but I'm struggling to get guest additions going in VirtualBox.
Background: I've fairly recently been obliged to start learning *nix after 25 years as a mainframe MVS => OS/390 => z/OS systems programmer. The *nix world is a complete and utter mystery to me, and so far I have walked away in disgust and fury from every attempt to get things running.
My Ubuntu image starts and complains about low graphics mode. OK, so I understand I have to install Guest Additions. I've exercised my Google-Fu and have seen all the different ways of doing this. But at the heart of the problem is making the .iso available as a virtual CD-ROM drive to mount. Nothing I've done will make the mount command work.
I have to do this using CLI as the GUI won't work due to low graphics mode. Catch-22.
If any of you kind folks can steer a noob in the right direction I'd appreciate it. If you're willing to help out please dumb it down as much as you can. I'd do the same for someone trying to get a CICS PTF from IBMLink and SMP/E receive it in z/OS!
Once again Upvan, sorry to hijack ...
---------- Post updated at 01:41 PM ---------- Previous update was at 01:23 PM ----------
Now I really feel like a goose. Just goes to show that if you swear enough, then open yourself up to ridicule, the answer will drop into your lap ...
$ sudo blkid ===> this showed that VirtualBox had given this image a CD-ROM
$ sudo mount /dev/sr0 /media/vbox ===> sweet!
$ cd /media/vbox
$ ls ===> see quite clearly the VBoxLinuxAdditions.run file ... so then I did:
$ sudo sh ./VBoxLinuxAdditions.run ===> this appears to have worked as it should. Ends with:
"You may need to restart the hal service and the Window System (or just restart the guest system) to enable the Guest Additions.
"Installing graphics libraries and desktop services components ...done."
I'll enjoy the smug feeling of having completed something before I reboot and have it all (inevitably) unravel.