Skip to main content

VirtualBox 5.1.22 Guest Additions (un)install fail and fix

Patch time again, say goodbye to half a day with urgent Windows updates and routine VirtualBox / Linux etc. updates for my workstation.

Anyway, it seems 5.1.22 fixed by earlier problem in 5.1.20 to do with Shared Folders, but I really wish they would test things a bit more, as this patching didn't go very smoothly and my VM failed to boot to completion (VBoxAdditions missing).

Attempting to run the installer gives you this message:

VirtualBox Guest Additions installer
You appear to have a version of the VirtualBox Guest Additions
on your system which was installed from a different source or using a
different type of installer.  If you installed it from a package from your
Linux distribution or if it is a default part of the system then we strongly
recommend that you cancel this installation and remove it properly before
installing this version.  If this is simply an older or a damaged
installation you may safely proceed.

Do you wish to continue anyway? [yes or no]

Okay.... haven't done anything differently. Attempting to continue wasn't helpful, and so embarked on some cleanup. Only, the script was missing.

It seems (looking with strace) that the message may have been occurring due to the lack of the file /opt/VBoxGuestAdditions-5.1.22/

Previously, there were a number of /opt/VBoxGuestAdditions-* folders, which evidently got cleaned up, so this bug may be related to that.

Lacking an script, I eventually found out that I could do the following:

cd /path/to/VBOXADDITIONS_5.1.22_115126/
./ -- uninstall

(note: there are two arguments there; the "--" is separate from the "uninstall". This is because the "--" serves to pass the "uninstall" as an argument to the installer. I happened to discover this when when I passed "--help" to the script, and then decided that "-- --help" might be interesting. Lo and behold it turns out that it has an "uninstall" flag.)

I did not have to undo the fix mount.vboxsf (made previously for my 5.1.20 fix)

Short story, after uninstalling this way, the installer works (and now there is an script). Rebooting the VM everything (X11, Clipboard sharing, Shared folders) seems to be working well.

PS. This was on RHEL 7.3, VirtualBox 5.1.22 (upgraded from 5.1.20)

Hope this helps.
(really wish upgrading VirtualBox was a less painful process).



Popular posts from this blog

ORA-12170: TNS:Connect timeout — resolved

If you're dealing with Oracle clients, you may be familiar with the error message
ERROR ORA-12170: TNS:Connect timed out occurred I was recently asked to investigate such a problem where an application server was having trouble talking to a database server. This issue was blocking progress on a number of projects in our development environment, and our developers' agile post-it note progress note board had a red post-it saying 'Waiting for Cameron', so I thought I should promote it to the front of my rather long list of things I needed to do... it probably also helped that the problem domain was rather interesting to me, and so it ended being a late-night productivity session where I wasn't interrupted and my experimentation wouldn't disrupt others. I think my colleagues are still getting used to seeing email from me at the wee hours of the morning.

This can masquerade as a number of other error strings as well. Here's what you might see in the sqlnet.log f…

Getting MySQL server to run with SSL

I needed to get an old version of MySQL server running with SSL. Thankfully, that support has been there for a long time, although on my previous try I found it rather frustrating and gave it over for some other job that needed doing.

If securing client connections to a database server is a non-negotiable requirement, I would suggest that MySQL is perhaps a poor-fit and other options, such as PostgreSQL -- according to common web-consensus and my interactions with developers would suggest -- should be first considered. While MySQL can do SSL connections, it does so in a rather poor way that leaves much to be desired.

UPDATED 2014-04-28 for MySQL 5.0 (on ancient Debian Etch).

Here is the fast guide to getting SSL on MySQL server. I'm doing this on a Debian 7 ("Wheezy") server. To complete things, I'll test connectivity from a 5.1 client as well as a reasonably up-to-date MySQL Workbench 5.2 CE, plus a Python 2.6 client; just to see what sort of pain awaits.

UPDATE: 2014-0…

From DNS Packet Capture to analysis in Kibana

UPDATE June 2015: Forget this post, just head for the Beats component for ElasticSearch. Beats is based on PacketBeat (the same people). That said, I haven't used it yet.

If you're trying to get analytics on DNS traffic on a busy or potentially overloaded DNS server, then you really don't want to enable query logging. You'd be better off getting data from a traffic capture. If you're capturing this on the DNS server, ensure the capture file doesn't flood the disk or degrade performance overmuch (here I'm capturing it on a separate partition, and running it at a reduced priority).

# nice tcpdump -p -nn -i eth0 -s0 -w /spare/dns.pcap port domain

Great, so now you've got a lot of packets (set's say at least a million, which is a reasonably short capture). Despite being short, that is still a massive pain to work with in Wireshark, and Wireshark is not the best tool for faceting the message stream so you can can look for patterns (eg. to find relationshi…