db_status
db_disconnect
db_connect 用户名：口令@服务器地址:端口/数据库名称
createdb msf4 -E UTF8 -T template0 -o msf3
hosts
dropdb msf4
db_nmap
db_nmap -Pn -sV -oX dmz 192.168.0/24 (导出dmz文件)
db_import /root/dmz
metasploit-数据库支持
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