The generation method of the random number at the time of the key pair making in gpg

Question

in gpg --key-gen

following error occured.

Not enough random bytes available. 
Please do some other work to give the OS a chance to collect more 
entropy!
(Need 300 more bytes)

What's wrong?

Answer 1

/dev/random's entropy pool is depleted.

"do something" to generate disk activity, network traffic, etc... and the entropy will build.

"man random" for more info.

"cat /proc/sys/kernel/random/entropy_avail" to see how you're doing, then try the gpg process again.