Here are some more vi Commands that I have learned recently:

j – move down one line
k – move up one line
ndd – delete n number of characters

And apparently there are many, many more. To be continued…

Here are a few basic vi commands that I have found helpful in adding and deleting information in a file from the command line.

dd – delete a line
i – change to insert mode
/ – perform a search query
n – move to the next result in the search
:wq – save the file and exit