学习小组day2笔记--清南北南

观前提醒：这一次的笔记就像是流水账，什么都写进去了，复习的时候可以直接看思维导图，简洁而详细

本课思维导图

1. 下载安装 xshell 7 和 xftp 免费版都超级顺利，登录也超级顺利，没有遇到任何问题（就让人怪不放心的，总觉得该出现点什么 bug 才行）
2. 登录之后熟悉基本命令，操作如下：

/usr/bin/xauth:  file /home/bio04/.Xauthority does not exist
bio04@VM-0-6-ubuntu:~$ pwd
/home/bio04
bio04@VM-0-6-ubuntu:~$ mkdir qingnan
bio04@VM-0-6-ubuntu:~$ cd qingnan
bio04@VM-0-6-ubuntu:~/qingnan$ cd ..
bio04@VM-0-6-ubuntu:~$ mkdir biosoft
bio04@VM-0-6-ubuntu:~$ mkdir project
bio04@VM-0-6-ubuntu:~$ mkdir tmp
bio04@VM-0-6-ubuntu:~$ mkdir src #源代码
bio04@VM-0-6-ubuntu:~$ ls
biosoft  project  qingnan  src  tmp
bio04@VM-0-6-ubuntu:~$ rmdir qingnan
bio04@VM-0-6-ubuntu:~$ ls
biosoft  project  src  tmp
bio04@VM-0-6-ubuntu:~$ mkdir qingnan
bio04@VM-0-6-ubuntu:~$ cd qingnan
bio04@VM-0-6-ubuntu:~/qingnan$ mkdir shanshan
bio04@VM-0-6-ubuntu:~/qingnan$ cd ..
bio04@VM-0-6-ubuntu:~$ rmdir qingnan
rmdir: failed to remove 'qingnan': Directory not empty
bio04@VM-0-6-ubuntu:~$ rm -r qingnan
bio04@VM-0-6-ubuntu:~$ ls
biosoft  project  src  tmp
bio04@VM-0-6-ubuntu:~$ cd tmp
bio04@VM-0-6-ubuntu:~/tmp$ pwd
/home/bio04/tmp
bio04@VM-0-6-ubuntu:~/tmp$ cd
bio04@VM-0-6-ubuntu:~$ 
bio04@VM-0-6-ubuntu:~$ mkdir rm test
bio04@VM-0-6-ubuntu:~$ cd rm test
-bash: cd: too many arguments
bio04@VM-0-6-ubuntu:~$ ls
biosoft  project  rm  src  test  tmp
bio04@VM-0-6-ubuntu:~$ #刚刚一次新建了两个文件夹！
bio04@VM-0-6-ubuntu:~$ rmdir rm test
bio04@VM-0-6-ubuntu:~$ ls
biosoft  project  src  tmp
bio04@VM-0-6-ubuntu:~$ mkdir rm_test
bio04@VM-0-6-ubuntu:~$ cd rm_test
bio04@VM-0-6-ubuntu:~/rm_test$ touch doodle.txt
bio04@VM-0-6-ubuntu:~/rm_test$ mkdir huahua
bio04@VM-0-6-ubuntu:~/rm_test$ cd huahua
bio04@VM-0-6-ubuntu:~/rm_test/huahua$ touch haha.txt
bio04@VM-0-6-ubuntu:~/rm_test/huahua$ cd ..
bio04@VM-0-6-ubuntu:~/rm_test$ rm doodle.txt
bio04@VM-0-6-ubuntu:~/rm_test$ ls
huahua
bio04@VM-0-6-ubuntu:~/rm_test$ rm -r huahua
bio04@VM-0-6-ubuntu:~/rm_test$ ls
bio04@VM-0-6-ubuntu:~/rm_test$ cd ..
bio04@VM-0-6-ubuntu:~$ ls
biosoft  project  rm_test  src  tmp
bio04@VM-0-6-ubuntu:~$ rmdir rm_test
bio04@VM-0-6-ubuntu:~$ ls
biosoft  project  src  tmp

3. 学习 vi & cat、cp、mv

bio04@VM-0-6-ubuntu:~/tmp$ vi xingqiushang.txt 
bio04@VM-0-6-ubuntu:~/tmp$ cat xingqiushang.txt 
second day at shengxin planet
everything goes well
keep learning & keep moving with huahua and everyone in our group
fighting!
bio04@VM-0-6-ubuntu:~/tmp$ head -n 2 xingqiushang.txt 
second day at shengxin planet
everything goes well
bio04@VM-0-6-ubuntu:~/tmp$ cp xingqiushang.txt new_file.txt
bio04@VM-0-6-ubuntu:~/tmp$ ls
new_file.txt  xingqiushang.txt
bio04@VM-0-6-ubuntu:~/tmp$ mv new_file.txt xingqiushang2.txt 
bio04@VM-0-6-ubuntu:~/tmp$ ls
xingqiushang2.txt  xingqiushang.txt 

4. 关于自动补全：输入字符后，按Tab 键，如果只有一个命令匹配到，按一次 Tab 键就自动将这个命令补全。
   如果输入的字符匹配多个命令则会列出所有可用的命令。