进入grub引导界面
#GRUB_TIMEOUT_SYTLE=hidden
GRUB_TIMEOUT=10
GRUB_CMDLINE_LINUX_DEFAULT="text"
update-grub

bionic: windows subsystem linux
/etc/apt/sources.list
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

apt update
apt autoremove
apt upgrade

vimrc
colorscheme ron
:syntax on
filetype on
filetype plugin on
filetype indent on
set sts=4
set shiftwidth=4
set backspace=2
set tabstop=4
set showmode
set nu
set nohlsearc