Vim

Useful Keybindings

:! - Run a terminal command from within vim

40G - Go to line number 40

12k - Move twelve lines up

daw - Delete a word

das - Delete a sentence.

:!read - Read an external file into the current file under the cursor.

m<letter> - create mark

<backtick><letter> - go to previously created mark

By selecting text in visual mode, you can run a terminal command on that selection as input, with the output being put back into the current buffer.