apt update Updating from such a repository can‘t be done securely, and is therefore
执行aptupdate报错如图:Err:6http://mirrors.aliyun.com/ubuntubionicReleaseSECURITY:URLredirecttargetcontainscontrolcharacters,rejecting.[IP:E:Therepository‘http://mirrors.aliyun.com/ubuntubionicRelease’nolong