Add common terminal commands

README.md

@@ -75,6 +75,15 @@ $ git config --list
 
 ### Terminal commands
 
+#### Common commands
+- `cd`: change directory
+- `ls`: list all the files
+- `mkdir`: make directory
+- `rmdir`: remove/delete directory
+- `touch`: create a file
+- `rm`: remove a file
+- `pwd`: find out the file path of current directory you are in, from the root
+
 See changes that have been made
 ```shell
 git diff