ls	Show directory contents (list the names of files).
      cd	Change Directory.
      mkdir	Create a new folder (directory).
      touch	Create a new file.
      rm	Remove a file.
      cat	Show contents of a file.
      pwd	Show current directory (full path to where you are right now).
      cp	Copy file/folder.
      mv	Move file/folder.
      grep	Search for a specific phrase in file/lines.
      find	Search files and directories.
      vi/nano	Text editors.
      history	Show last 50 used commands.
      clear	Clear the terminal screen.
      tar	Create & Unpack compressed archives.
      wget	Download files from the internet.
      du	Get file size.