在虛擬機中新安裝的Ubuntu16.04默認連不上網的，導致基礎類庫軟件無法更新，而且putty、FileZilla等工具也無法連接Ubuntu。
一、首先要設置宿主機器的網絡
設置本地連接與虛擬網絡VMnet8共享
設置虛擬網絡VMnet8
二、安裝好的虛擬機網絡調整為NAT模式。進入Ubuntu系統查看網卡名稱，然后調整網絡配置。
查看網卡名稱：ifconfig
由於默認vi編輯器有問題，比如上下左右變成ABCD，此問題下面會解決。所以暫時用gedit命令調整網絡配置，
配置DNS服務器，
重啟網絡服務
測試網絡是否可用
三、源調整
查看ubuntu系統的codename
備份源
修改源
1 #xenial指codename，請根據實際情況調整 2 #163源： 3 deb http://mirrors.163.com/ubuntu/ xenial main restricted universe multiverse 4 deb http://mirrors.163.com/ubuntu/ xenial-security main restricted universe multiverse 5 deb http://mirrors.163.com/ubuntu/ xenial-updates main restricted universe multiverse 6 deb http://mirrors.163.com/ubuntu/ xenial-proposed main restricted universe multiverse 7 deb http://mirrors.163.com/ubuntu/ xenial-backports main restricted universe multiverse 8 deb-src http://mirrors.163.com/ubuntu/ xenial main restricted universe multiverse 9 deb-src http://mirrors.163.com/ubuntu/ xenial-security main restricted universe multiverse 10 deb-src http://mirrors.163.com/ubuntu/ xenial-updates main restricted universe multiverse 11 deb-src http://mirrors.163.com/ubuntu/ xenial-proposed main restricted universe multiverse 12 deb-src http://mirrors.163.com/ubuntu/ xenial-backports main restricted universe multiverse 13 14 #阿里源： 15 deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse 16 deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse 17 deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse 18 deb http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse 19 deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse 20 deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted universe multiverse 21 deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted universe multiverse 22 deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted universe multiverse 23 deb-src http://mirrors.aliyun.com/ubuntu/ xenial-proposed main restricted universe multiverse 24 deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse 25 26 #中科大源（在安裝Chrome Deps時很好用） 27 deb http://mirrors.ustc.edu.cn/ubuntu/ xenial main restricted universe multiverse 28 deb http://mirrors.ustc.edu.cn/ubuntu/ xenial-security main restricted universe multiverse 29 deb http://mirrors.ustc.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse 30 deb http://mirrors.ustc.edu.cn/ubuntu/ xenial-proposed main restricted universe multiverse 31 deb http://mirrors.ustc.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse 32 deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial main restricted universe multiverse 33 deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial-security main restricted universe multiverse 34 deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse 35 deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial-proposed main restricted universe multiverse 36 deb-src http://mirrors.ustc.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse
如果上面的源有問題就用簡潔版本
1 deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted universe multiverse 2 # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted universe multiverse 3 deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse 4 # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main restricted universe multiverse 5 deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse 6 # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse 7 deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main restricted universe multiverse 8 # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main restricted universe multiverse
最后update
四、上下左右變成ABCD問題，卸載vi重新安裝即可
五、安裝ssh服務，方便使用putty遠程登錄Ubuntu
