解决 linux DNS 服务器执行 rnc-confgen 响应慢的问题

官方网站:
You must use the keyboard to create entropy, since your system is lacking
/dev/random (or equivalent)

start typing:
rndc-confgen: generate key: out of entropy

大概意思就是服务器上没有random产生器，这种情况下我们就手动伪造一个文件代替/dev/random的功能
###新建一个 random 文件随即输入一串数字“记得要长~~

1. rm -rf /dev/random

2. vi /dev/random

kdsajfouweoifjkdslajfklusadiofjoiweajkfldsjalfjdsmncvkldsjfiodjsifjiodsafjkdsjalfjdslkjafkldsnaklvnkdjsaf

3. rndc-confgen -r /dev/random > /etc/rndc.conf