VBoxManage list hdds VBoxManage modifyhd 0bc1f930-5460-4e41-ab6c-22c042b7d5ac –resize 51200

virutalbox 全屏显示 点击【设备】，然后点击【安装增强功能】

df -ah
fdisk /dev/sda mkfs ext4 /dev/sda4 blkid

fstab UUID= /xxx ext4 defaults 0 0 partprobe

ubuntu安装 sed -i ‘s/archive.ubuntu.com/mirrors.ustc.edu.cn/g' /etc/apt/sources.list apt-get install openssh-server apt-get install vim sudo apt-get install unity-tweak-tool