一，旧版本ubuntu上的apt源不能用了#apt-getupdate忽略:1http://mirrors.aliyun.com/ubuntuhirsuteInRelease忽略:2http://mirrors.aliyun.com/ubuntuhirsute-securityInRelease忽略:3http://mirrors.aliyun.com/ubuntuhirsute-updatesInRelease忽略:4http://mirro