vi -- advanced

:.=       returns line number of current line at bottom of screen

:=        returns the total number of lines at bottom of screen

^g/:f     List file info: fine name, number of lines in file, position of cursor in file

:30 Move cursor to line thirty

shift + 3    equals ?world( the world which at the position of the mouse) 

dw  delete worlds

m      Mark the line on which the cursor resides. Marking requires an identifier.

ma     Mark the line as identified by the letter "a" by marking with keystroke "ma"

:set all     - display all mode settings of your editing session.

:set termcap    - display terminal settings of your editing session.

:set ic     - Change default to ignore case for text searches

:set list    Show tabs and end of line markers

:set nolist   Turn of tab and eol markings

:r filename read file named filename and insert after current line

:12,35w     smallfile write the contents of the lines numbered 12 through 35 to a new file named smallfile

:Explore   List files in your current directory

:Explore  directory-name     List files in specified directory

:Vexplore Split with a new vertical window and then list files in your current directory

:Sexplore Split with a new horizontal window and then list files in your current directory