问题：
"Unable to connect to vulnerability scanner. If the system has been updated recently the vulnerability scanner is rebuilding its database. Please wait a few minutes."
解决方法：
ps -ef |grep open
/usr/sbin/openvasmd --listen=0.0.0.0 --port=9391 ==》IP有问题
vim /etc/default/openvas-scanner
SCANNER_ADDRESS=0.0.0.0 ==》修改成openvas所在IP即可。
SCANNER_PORT=9391