Every day a Linux command learns--CD and PWD commands __linux

The CD command I learned today doesn't really have to be about syntax or DOS. Represents the current directory, ... /indicates the parent directory ~ represents the current user root directory,/represents the system root a new parameter!$ represents the parameter of the previous command as a parameter to the CD for example: you perform the PWD then the CD!$, which is equivalent to performing a CD pwd but this is not eggs.

The PWD command is to display the full path of the current directory and learn.