There are five fundamental Linux directory commands for working with files and directories, as listed below:
pwd:  pwd refers to “print working directory”. We use this command to display the path of the current working directory. The syntax of this command is $ pwd.
cd: cd refers to “change directory”. We use this command to change the present working directory to the specifically required directory. The syntax of this command is $ cd .
Is: ls refers to “list”. We use this command to view the full list of files and directories in the present working directory. The syntax of this command is $ ls.
mkdir: mkdir refers to “make directory”. We use this command to create directories in Linux.  The syntax of this command is $ mkdir .
rmdir: rmdir refers to “remove directory”. We use this command to remove or delete any directory on the command line. The syntax of this command is $ rmdir .