问题
Setup : Ubuntu Server on Virtual Machine with 6 cores and 3GB of RAM.
when I am trying to generate a asymmetric key pair via GPG like this gpg --gen-key . I get the following error :
Not enough random bytes available. Please do some other work to give
the OS a chance to collect more entropy!
I tried to google a little bit. This is what I realise ,
I need to fire up another terminal and type in cat /udev/random --> It randomly generates a series of randomly generated values to increase the entropy.
I dont see any change in here watch cat /proc/sys/kernel/random/entropy_avail
and it still persists to give me the same error
回答1:
Run the following:
find / > /dev/null
That helped me quickly to complete my key generation.
回答2:
Try installing haveged, this is a daemon, which helps the system with generating random numbers for your key.
sudo aptitude install haveged
回答3:
I've tried different tricks while watching the /proc/sys/kernel/random/entropy_avail value. But trying to make an MD5 hash of an entire disk really gave my system entropy on steroids without installing extra packages.
find /dev/disk/by-uuid/ -type l | xargs md5sum
回答4:
Trying installing rngd. If your CPU if reasonably modern it will have a hardware random number generator built in, and rngd will use this to generate enough entropy.
Watch out for people telling you to run rngd -r /dev/urandom. While this will get rid of your error, it does it by faking entropy and leads to insecure keys.
回答5:
Move your mouse around for 30s or so in a new tab, and then try the following:
base64 /dev/urandom
This will start printing out random code to the screen. In a few mins, sufficient amount of psuedo-random data would have been generated to complete key generation.
回答6:
This is what is the solution I found to it
I had to do gpg --gen-key --no-use-agent
after that in an another terminal I fired up cat /dev/random
This fortunately for me worked at the end :)
回答7:
try running (in another terminal tab)
$cat /proc/sys/kernel/random/entropy_avail
on command line, it it returns less than 100-200, then something is wrong, install rng-tools
$sudo apt-get install rng-tools
That should have fixed this issue, check the previous tab and you have the key
回答8:
I did apt-get install libreoffice and apt-get remove libreoffice* a couple times. That did the trick. Pick some other big fat program for yourself to use.
回答9:
I try to solve. I use Fedora 25 with gpg1 and gpg2 have installed as standar for mechine.
Declare about problem.
If you use Fedora 25 OS, i see gpg confict wiht ownertrust (please remove old trustdb.gpg) at otrust.tmp. and must create new trustdb.gpg.
Please follow this command at your terminal command. (not have to root mode). You may try to re-create the trustdb using the commands:
cd ~/.gnupg
gpg2 --export-ownertrust > otrust.tmp
rm trustdb.gpg
gpg2 --import-ownertrust < otrust.tmp
then you can use
gpg --list-secret-keys --keyid-format LONG
then export as asci format.
gpg --armor --export "type-here-your-secKEY"
回答10:
at the end of gpg message u see parentheses like (125 byte remaining)
the gpg needs some random bytes that u must enter.so press Ctrl-z and type a random set of x(number in parentheses) characters not necessarily meaningful like: dfkheuhasdkjvdaiugekjfhflsdfhuhggskdfjhsjdf
then do it 2 or 3 times, GPG shows an answer that tells u it's done key generating:)
回答11:
You can install daemons to gather entropy. This command would install two such daemons:
sudo apt-get install haveged rng-tools
I would personally perfer haveged (because of the people who have created it) over rng-tools. But, I prefer to install both since they quite different.
回答12:
Running $ sudo rngd -r /dev/urandom
Then running $ gpg --user-agent
and $ ps -ef | egrep rngd (shows process number of rngd, e.g. 9999)
then $ sudo kill 9999
worked for me on my Ubuntu 13.04 system.
回答13:
Just use another random maker under Ubuntu:
mv /dev/random /dev/chaos && ln -s /dev/urandom /dev/random
and retry your gpg command
来源：https://stackoverflow.com/questions/11708334/pgp-not-enough-random-bytes-available-please-do-some-other-work-to-give-the-os