Directory Commands

1. pwd  :-  pwd stands for “Print working Directory”. This command allows you to know the current directory in which you               are located.
2. cd  :-  .Change directory 
   This command allows you to change the directories.
   cd /home :- (root directory) Change the current working directory to /home.
   cd ..  :- Change to parent directory of current directory.
   cd ~  :-  This allows to move to the user’s home directory as : /home/user
3. Create and Delete directories 
   mkdir dname :- This command will create a new directory named as dname.
   rmdir dname :- This command will delete the dname directory (Empty directory)
   rm -r d   :-  It allows to remove directories and their contents recursively.
4. ls  – List information about the files (by default current directory )
   ls -l  :- list all file/directory information in current directory(long version)
   ls -a :- list hidden files ( It will not ignore entries starting with . )
   ls -R :- (List Sub-directories) list current directory and all other directories within current directory.
   ls -r  :- list in reverse alphabetically order.