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fix some typos #21

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fix some typos #21

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5 changes: 3 additions & 2 deletions lab0/lab0_2_2_3_install.md
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Expand Up @@ -36,15 +36,16 @@ ls命令默认状态下将按首字母升序列出你当前文件夹下面的所

ls / # 将列出根目录'/'下的文件清单.如果给定一个参数，则命令行会把该参数当作命令行的工作目录。换句话说，命令行不再以当前目录为工作目录。
ls -l # 将给你列出一个更详细的文件清单.
ls -a # 将列出包括隐藏文件(以.开头的文件)在内的所有文
件. ]ls -h # 将以KB/MB/GB的形式给出文件大小,而不是以纯粹的Bytes.
ls -a # 将列出包括隐藏文件(以.开头的文件)在内的所有文件.
ls -h # 将以KB/MB/GB的形式给出文件大小,而不是以纯粹的Bytes.

(2) 查询当前所在目录：(pwd)

chy@chyhome-PC:~$ pwd
/home/chy

(3) 进入其他目录：(cd)

chy@chyhome-PC:~$ pwd
/home/chy
chy@chyhome-PC:~$ cd /root/
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