第二天正式学习Linux

学习大纲

代码

bio01@VM-0-6-ubuntu:~/tmp$ cd~:
cd~:: command not found
bio01@VM-0-6-ubuntu:~/tmp$ cd
bio01@VM-0-6-ubuntu:~$ cat nihao.txt
cat: nihao.txt: No such file or directory
bio01@VM-0-6-ubuntu:~$ cd tmp
bio01@VM-0-6-ubuntu:~/tmp$ cat nihao.txt

hello world
hello everyone