Ubuntu – Unable to install guest additions: unknown filesystem type ‘iso9660’

14.04guest-additionsvirtualbox

Running Ubuntu 14.04 on Oracle VirtualBox 4.3.24 and completely stuck with mounting guest additions. I've spent quite a time looking for a solution online, but nothing helped…

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As suggested below, I've tried to mount manually and also download ISO from the web (version matching VirtualBox). The same error:

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EDIT:

Now some folders became "read-only", which causes big troubles..
Even installing fresh Ubuntu 14.04 image doesn't help… So reinstalling of VirtualBox itself…

Best Answer

I was able to resolve the mounting issue by the reinstalling the linux image:

sudo apt-get install --reinstall linux-image-$(uname -r)

BTW, it all started with upgrading VirtualBox. Bidirectional clipboard stopped working so I tried to reinsert Guest Additions ISO. This caused above stuff. Now, Guest Additions are mounted back, but clipboard wtill doesn't work...

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