密码生成

# 密码生成
# while true;do echo `tr -dc A-Za-z0-9_ < /dev/urandom |head -c 15`;done
# while true;do echo `tr -dc A-Za-z0-9_ < /dev/urandom |head -c 1024`;sleep 5;done
# for i in {0..256};do echo `echo "$(cat /dev/urandom |od -x|head -n 1)" "$(date)"|sha256sum|base64 |head -c 32` |tee passwds.txt ;done