核心内容：
1、VMware卸载和安装
2、linux的基本命令

1、VMware卸载和安装
卸载VMware
----------------
    控制面板-->vmware->卸载。
安装VMware
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    1.VMware-workstation-full-11.1.2-windows-x86_64.exe
        以管理员身份运行.
    2.自定义安装
        指定安装目录(没有空格，没有中文)
        ...
在vmware中安装centos客户机
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    1.vware文件菜单-->新建虚拟机->典型安装
    2.安装程序光盘镜像文件，指定CentOS-7-DVD-1503-01-x86_64.iso
    3.个性化linux
        全名    :centos
        用户名    :centos
        密码    :123456
        确认密码:1234562、linux的基本命令
centos基本命令
---------------------------
    CentOS                                Windows
    $>ls                                     cmd>dir                                                 查看目录
    $>ls --help                                                                                         查看命令帮助
    $>man ls                                                                                            查看命令帮助
    
    $>clear                               cmd>cls                                                  清屏
    $>cd /home                       cmd>cd d:/                                             切换目录  d盘下。。。
    $>cd .                                 cmd>cd .                                                 进入当前目录
    $>cd ..                                cmd>cd ..                                                进入上级目录
    $>cd /home/centos           cmd>cd d:/xx/x/x                                   进入绝对路径
    $>pwd                                                                                               显式当前目录
    $>whoami                                                                                         显式当前用户名
    $>su root                                                                                          切换用户,输入密码
    $>passwd                                                                                          修改当前用户的密码
    $>ifconfig                         cmd>ipconfig                                          查看ip地址
    $>ping localhost              cmd>ping localhost                                 查看网络连通情况
    $>ping www.baidu.com        cmd>ping www.baidu.com                查看网络连通情况
    $>启动桌面版的网卡
        on.
    $>su centos                                            
    $>cd /home/centos                                    
    $>cd ~                                                                                              回到主目录
    $>cd -                                                                                               回到上次的目录
    $>ll                                                                                                    别名,ls -l --autocolor...
    $>alias                                                                                              查看所有的别名
    $>ls -a -l -h                                                                                      查看当前目录-h:人性化 -l:列表 -a:显式.开头
    $>mkdir ~/Downloads/a                                                                 创建目录
    $>touch ~/Downloads/a/1.txt                                                         创建文件
    $>echo helloworld > 1.txt                                                               重定向输出
    $>cat 1.txt                                                                                        查看文件
    $>cp 1.txt 2.txt                                                                                 复制文件
    $>rm 1.txt                                                                                        删除文件
    $>rm -rf tmp                                                                                    强行递归删除
    $>mv a.txt tmp/                                                                               强行递归删除
end:坚持    

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