Has anyone successfully used the version of certbot in jessie-backports
to install https certificates from letsencrypt on Apache?
The reason for asking is that I haven't :)
It doesn't help that the version there is older than the one covered by
the documentation at <https://certbot.eff.org/docs/using.html> - there's
no 'certificates' command, for example.
I was looking to upgrade my VPS to the latest Ubuntu release this afternoon but ran across a problem. Whenever I try to run "do-release-upgrade” I receive the following error:
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [836 B]
Get:2 Upgrade tool [1,265 kB]
Fetched 1,266 kB in 0s (0 B/s)
authenticate 'xenial.tar.gz' against 'xenial.tar.gz.gpg'
gpg exited 1
gpg: Signature made Wed 07 Dec 2016 09:10:01 GMT using RSA key ID C0B21F32
gpg: /tmp/ubuntu-release-upgrader-r7c80csz/trustdb.gpg: trustdb created
gpg: BAD signature from "Ubuntu Archive Automatic Signing Key (2012) <ftpmaster(a)ubuntu.com<mailto:email@example.com>>"
Authenticating the upgrade failed. There may be a problem with the network or with the server.
Searching online<http://askubuntu.com/questions/842706/how-to-upgrade-ubuntu-if-i-get-authen…>, this looks like it could be a problem with the xenial.tar.gz file on the local repo cache. Has anyone else had similar problems, and if so, how did you resolve them?
I suppose beyond that, has anyone successfully upgraded their Ubuntu VPS to 16.04? Were there any problems along the way?
If you do not use BitFolk's Entropy service and have no interest in
doing so then this email will be of little interest to you can be
If you haven't heard about the Entropy service before, please see:
If you *do* use the Entropy service though, I'm interested to know
what software you have that actually uses /dev/random (and not
Some background to this question:
To provide the Entropy service we use hardware entropy generators,
currently exclusively a pair of EntropyKeys manufactured by a UK
company called Simtec Electronics Ltd.
Despite the fact that these were extremely popular little devices
(compared to other fairly niche little gadgets), Simtec always had a
supply problem and then Simtec imploded as a company, so as far as I
know these are now impossible to obtain, the IP is lost forever etc.
Although I have one spare EntropyKey ready to put in service should
one of the two in service ever die (I've not experienced that yet),
that left me slightly worried as to what I'd do if I needed to get
Then I saw the OneRNG kickstarter, and decided to pledge. So now I
have 5 of (the internal USB version of) these:
I've not yet gone any further than verifying that they keep the
entropy pool full on the machine they're plugged into, but that's
good enough for now. Could be a decade before one of my existing
I have since heard that this device proved far more popular than its
manufacturer expected (sense a theme?) and they're now extremely
difficult to get hold of because they need to get a new batch made
in China. I've had multiple people contacting me on the basis of a
tweet I did about getting these, asking me to sell them mine (which
I would, but they didn't want internal USB).
The point I'm trying to make here is that the world of hardware
random number generators is not one with reliable supply lines,
unless you want to spend a fortune on some black box.
So when I came across:
I was sad that the nerdery that is the Entropy service may be
misguided, but also happy with the possibility that I might never
have to source a hardware RNG again.
Let's just take the argument posited by the article, that all
(Linux) software should just learn to love /dev/urandom¹, as true.
If you don't agree with this claim, you are disagreeing with some
pretty big names in crypto. The Hacker News commentary on the
article may also prove of interest:
At the very least, I feel the Entropy article on the BitFolk Wiki
needs an update in light of this. To justify the service's
existence, if nothing else.
Going further, the question becomes, well, what software is there in
existence that forces use of /dev/random with no configuration that
would allow otherwise? Because even if we agree that all software
*should* be using urandom, if some popular software *refuses* to
without recompile, then we're still going to have to provide an
Entropy service, because doing so is easier than running
So Entropy service users, what have you got that uses /dev/random?
¹ A more correct summary of it is probably, "urandom is fine all the
time except for on initial boot when a small amount of entropy
from outside the CSPRNG is desirable."
On shutdown all fairly modern Linuxes save the current entropy
pool to the filesystem and load it up from there on boot, so it's
only essential on first boot.
http://bitfolk.com/ -- No-nonsense VPS hosting
Around 08:06Z today we received an alert regarding host
snaps.bitfolk.com. I found it completely unresponsive over network,
but was still able to connect to its console.
Despite it believing its network interfaces were up and had link, it
was passing no traffic to the colo switches.
I spent about 30 minutes trying to diagnose this and not getting
anywhere, so decided to try rebooting it. As I had console access I
was able to cleanly shut down all VPSes on snaps first.
The shutdown and boot went without incident and things seemed fine
on boot. By about 08:40Z all VPSes that should be running had been
started, and by now Nagios is clear of alerts¹.
I am aware that snaps had an unexplained outage a few months ago, on
28 September. This time the symptoms are not the same, other than
that the problem is unexplained and clears after a reboot.
Clearly there is something wrong there though and it's going to
happen again, so over the next few days we will be moving customers
off of snaps. We will co-ordinate this directly with customers
Apologies for the disruption,
¹ Except for one customer web server which is waiting for a TLS
passphrase to be supplied before it will start.
https://bitfolk.com/ -- No-nonsense VPS hosting
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Is it just me, or has Bitfolk's IPv6 connectivity been a bit unreliably
these last few months?
These are the 5-minuter-or-longer IPv6 downtimes Pingdom has reported
for both my two Bitfolk nodes. The times being in UTC, and rounded to
the nearest full minutes.
2017-12-19: 07:38 to 07:48
2017-12-12: 17:27 to 17:49
2017-11-15: 18:29 to 18:36
2017-10-22: 09:59 to 10:21
2017-09-07: 00:23 to 00:45
2017-09-06: 15:17 to 15:39
I've lowered the cost of 10GB of additional data transfer by half,
so the changes are:
| Old | New
Monthly | £0.50 | £0.25
Quarterly | £1.40 | £0.70
Yearly | £5.00 | £2.50
If you do not already pay for additional monthly data transfer then
the rest of this email probably won't be of interest.
Those paying by Direct Debit will just be charged less. Those paying
by PayPal have already had their subscription details altered and
PayPal should have told you about that.
Those paying by standing order will need to take care to adjust their
regular payment otherwise you will be paying too much. It will build
up as credit on your account. You can see the cost of your current
https://bitfolk.com/ -- No-nonsense VPS hosting
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