Linux command

pwd

The directory you are standing in is called the working directory. To find the name of the working directory, use the pwd command.

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ls

To list the files in the working directory, use the ls command.

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cd

cd /usr
cd /usr/bin

cd ..
".." notation refers to the working directory's parent directory

cd ./bin
cd bin

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http://www.linuxcommand.org/lc3_lts0020.php

直接进入某个目录

cd ~/directoryName

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https://zhidao.baidu.com/question/181421264.html

删除目录

rm -rf directoryName

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读取文件内容

cat fileName

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Show All Running Processes in Linux

https://www.cyberciti.biz/faq/show-all-running-processes-in-linux/

How do I edit files on the command line

To open the file, run

vi /path/to/file

Press i to enter the Insert mode.

To leave the Insert mode press ESC.

To delete the character that is currently under the cursor you must press x

If you haven't made any changes, press :q to leave the file (but you must not be in Insert mode).

If you have made changes, but want to leave the file without saving the changes, press :q! (but you must not be in Insert mode).

https://www.howtoforge.com/faq/how-to-edit-files-on-the-command-line

https://www.computerworld.com/article/2598082/linux/linux-linux-command-line-cheat-sheet.html