vim常用命令

1. 全选（高亮显示）：按esc后，然后ggvG或者ggVG
2. 全部复制：按esc后，然后ggyG
3. 全部删除：按esc后，然后dG
4. 粘贴：插入模式下，ctrl+shift+v（wsl开启ctrl+shift+c/v复制粘贴模式）

    # /etc/apt/sources.list
    sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup # 复制一份备份
    sudo vim /etc/apt/sources.list
    # 在第一行的第一个位置，按esc，输入dG，全选删除
    # 因为在wsl中开启了ctrl+shift+c/v复制粘贴模式，所以可以直接ctrl+c复制下边的字符，在终端vim中按i进入插入模式，再按ctrl+shift+v粘贴
    #阿里云源
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

    # 按esc，:wq，写入保存
    sudo apt-get update # 更新源
    sudo apt-get install package # 安装包
    sudo apt-get remove package # 删除包
    sudo apt-cache search package # 搜索软件包
    sudo apt-cache show package  # 获取包的相关信息，如说明、大小、版本等
    sudo apt-get install package --reinstall  # 重新安装包
    sudo apt-get -f install  # 修复安装
    sudo apt-get remove package --purge # 删除包，包括配置文件等
    sudo apt-get build-dep package # 安装相关的编译环境
    sudo apt-get upgrade # 更新已安装的包
    sudo apt-get dist-upgrade # 升级系统
    sudo apt-cache depends package # 了解使用该包依赖那些包
    sudo apt-cache rdepends package # 查看该包被哪些包依赖
    sudo apt-get source package  # 下载该包的源代码
    sudo apt-get clean && sudo apt-get autoclean # 清理无用的包
    sudo apt-get check # 检查是否有损坏的依赖