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Campbell Ritchie (88) [Avatar] Offline
Page 30. I had a slightly different experience; maybe they have changed the repositories in F27
sudo dnf update
[sudo] password for critchie:
Fedora 27 - x86_64 - Updates 2.6 MB/s | 17 MB 00:06
Last metadata expiration check: 0:00:04 ago on Sat 27 Jan 2018 02:42:33 GMT.
Dependencies resolved.
Nothing to do.
[critchie@campbell ~]$ sudo dnf install virtualbox
Last metadata expiration check: 0:00:30 ago on Sat 27 Jan 2018 02:42:33 GMT.
* Maybe you meant: VirtualBox
No match for argument: virtualbox
Error: Unable to find a match
[critchie@campbell ~]$ sudo dnf install VirtualBox
Last metadata expiration check: 0:00:47 ago on Sat 27 Jan 2018 02:42:33 GMT.
Dependencies resolved.
Package Arch Version Repository Size
VirtualBox x86_64 5.1.30-2.fc27 rpmfusion-free-updates 7.3 M
Installing dependencies:

Transaction Summary
Install 29 Packages

Total download size: 35 M
Installed size: 110 M
VirtualBox rather than virtualbox (I was surprised to see capital letters) and it is in the RPM Fusion repository.
David Clinton (92) [Avatar] Offline
Thanks. I'll add a note about that in the chapter...but the longer process I document is still important for the package management principles it teaches.
Campbell Ritchie (88) [Avatar] Offline
Campbell Ritchie (88) [Avatar] Offline
Unfortunately that doesn't appear to be the end of the story smilie

All was well until I got a routine new kernel (→ at the end of last week. All of a sudden, booting became much slower than it had been; there were two start jobs, one for Sophos anti virus daemon and the other for create kmods with akmod which seemed to take much longer than normal and had an unlimited timeout. I managed to boot into the old kernel (not debug); sudo dnf undo last didn't help the situation. After a bit of searching, I found this, and followed their suggestion about uninstalling akmod, but as predicted, Virtual Box was uninstalled too. Booting normally now smilie. Maybe it is something to do with a new kernel. I shall have to try the old technique for installing Virtual Box.
Have you seen anything like this with Virtual Box before? I haven't posted on any other fora yet.