pacman v4 -- how to collect entropy via ssh [SOLVED]

graysky · 2011-11-12 15:54:20

How can one proceed if installing pacman4 from [testing] via an ssh connection? This is on a headless box.

# pacman-key --init
gpg: Generating pacman keychain master key...

Not enough random bytes available.  Please do some other work to give
the OS a chance to collect more entropy! (Need 282 more bytes)

Last edited by graysky (2011-11-12 19:01:37)

karol · 2011-11-12 17:15:17

http://mailman.archlinux.org/pipermail/ … 22269.html - maybe just playing with urandom will work if you're not inside a VM, otherwise try
http://mailman.archlinux.org/pipermail/ … 22273.html

Last edited by karol (2011-11-12 17:18:05)

graysky · 2011-11-12 19:01:24

Wow, what is pain in the balls, thank you!

http://mailman.archlinux.org/pipermail/ … 22273.html contained the solution.

1) https://aur.archlinux.org/packages.php?ID=14589 <--- build and install
2) rngd -f -r /dev/urandom in one ssh window
3) vim /etc/conf.d/rngd and change 0 to 10
4) pacman-key --init

graysky · 2012-01-17 12:22:36

I edited the pacman page on the wiki adding this advice now that [core] contains pacman4. Thanks again, Karol for the links.

Can a mod move this thread to the pacman section of the bbs?

Last edited by graysky (2012-01-17 12:23:46)

derloy · 2012-01-17 13:23:34

This is not the proper way to use rng-tools. You are feeding entropy from /dev/urandom back into the kernel - that makes no sense. You are better off just doing some nice IO.

graysky · 2012-01-17 13:48:39

@derloy - please provide an example that satisfies the need.

Larsson · 2012-01-17 15:09:12

Open some applications, move some windows around, resizing etc. Then entropy goes up.

Last edited by Larsson (2012-01-17 15:09:27)

karol · 2012-01-17 15:10:13

Larsson wrote:

Open some applications, move some windows around, resizing etc. Then entropy goes up.

http://mailman.archlinux.org/pipermail/ … 22273.html

lifeafter2am · 2012-01-17 15:15:21

Larsson wrote:

Open some applications, move some windows around, resizing etc. Then entropy goes up.

Please read the first post ... he specifically states that this is a headless box.

ewaller · 2012-01-17 16:01:19

In light of Pacman 4 moving from testing, this thread should follow.
Moving to Pacman and Package upgrades

edit: Thanks Graysky

Last edited by ewaller (2012-01-17 16:02:32)

Larsson · 2012-01-17 18:01:03

lifeafter2am wrote:

Please read the first post ... he specifically states that this is a headless box.

Sorry for that, my english is not that good, so I missunderstood the post.

jiggpig · 2012-01-17 18:43:36

IO worked for me (like derloy suggested) on my headless box. In another SSH session, I went into a directory with a lot of large video files, and:

cat * > /dev/null

Took a few minutes but did the trick.

graysky · 2012-01-17 20:35:22

jiggpig wrote:

IO worked for me (like derloy suggested) on my headless box. In another SSH session, I went into a directory with a lot of large video files, and:
cat * > /dev/null
Took a few minutes but did the trick.

I tried this... after catting 10 G of video files, the operation in the 2nd ssh window hasn't moved at all.

Window 1:

$ sudo pacman-key --init
gpg: /etc/pacman.d/gnupg/trustdb.gpg: trustdb created
gpg: no ultimately trusted keys found
gpg: Generating pacman keychain master key...

Not enough random bytes available.  Please do some other work to give
the OS a chance to collect more entropy! (Need 277 more bytes)

Window 2:

$ for i in $(ls); do cat "$i" >/dev/null; done

Now, when I repeat using the the instructions I posted to the pacman wiki page, this happens nearly instantaneously:

$ sudo pacman-key --init
gpg: /etc/pacman.d/gnupg/trustdb.gpg: trustdb created
gpg: no ultimately trusted keys found
gpg: Generating pacman keychain master key...

Not enough random bytes available.  Please do some other work to give
the OS a chance to collect more entropy! (Need 277 more bytes)
+++++
.+++++
gpg: key 4D863ABB marked as ultimately trusted
gpg: Done
==> Updating trust database...
gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model
gpg: depth: 0  valid:   1  signed:   0  trust: 0-, 0q, 0n, 0m, 0f, 1u

Last edited by graysky (2012-01-17 20:38:17)

ewaller · 2012-01-17 20:39:15

I found that starting the key generation process and then switching over to the browser and moderating the forums for a while generates more than enough entropy

jasonwryan · 2012-01-17 20:40:56

ewaller wrote:

I found that starting the key generation process and then switching over to the browser and moderating the forums for a while generates more than enough rage!!!

madko · 2012-02-11 19:01:46

Hi,

Same problem here on an ARM box. I'd like to install rng-tools but pacman says no such target
I have no big files on this server, so I try to generate some IO but still no luck. Any other idea to solve this problem?

EDIT: I just haven't wait enough

Last edited by madko (2012-02-11 19:10:31)

Barthalion · 2012-02-11 19:23:52

There is haveged in [community]. Simply start the daemon after installation.

.:B:. · 2012-02-11 19:33:26

ewaller wrote:

I found that starting the key generation process and then switching over to the browser and moderating the forums for a while generates more than enough entropy

All that on a headless server huh .

scottro · 2012-03-06 14:58:02

Graysky's post (#4) works without any other issues. Whether it's the accepted method or not, it's the one that works most quickly.

IM far less than humble opinion, that's what should go in the wiki. Keep in mind that many people come to Arch because they are tired of overly GUI oriented distributions.

graysky · 2012-03-06 15:23:42

Scrot - I added it to the pacman page a while ago.

alphaniner · 2012-03-06 15:32:55

@graysky

I don't see anything about this on the pacman page

Last edited by alphaniner (2012-03-06 15:40:58)

xduugu · 2012-03-06 15:57:23

Someone moved it to the pacman-key page.

Arch Linux

#1 2011-11-12 15:54:20

pacman v4 -- how to collect entropy via ssh [SOLVED]

#2 2011-11-12 17:15:17

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#3 2011-11-12 19:01:24

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#4 2012-01-17 12:22:36

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#5 2012-01-17 13:23:34

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#6 2012-01-17 13:48:39

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#7 2012-01-17 15:09:12

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#8 2012-01-17 15:10:13

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#9 2012-01-17 15:15:21

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#10 2012-01-17 16:01:19

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#11 2012-01-17 18:01:03

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#12 2012-01-17 18:43:36

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#13 2012-01-17 20:35:22

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#14 2012-01-17 20:39:15

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#15 2012-01-17 20:40:56

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#16 2012-02-11 19:01:46

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#17 2012-02-11 19:23:52

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#18 2012-02-11 19:33:26

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#19 2012-03-06 14:58:02

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#20 2012-03-06 15:23:42

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#21 2012-03-06 15:32:55

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

#22 2012-03-06 15:57:23

Re: pacman v4 -- how to collect entropy via ssh [SOLVED]

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