| Command | Use case |
|---|---|
| :r {file} | read all in {file} |
| :r !head -5 {file} | read top 5 lines from {file} |
| :r !tail -10 {file} | read last 10 lines from {file} |
| :w | write to exists file |
| :w {file} | write to {file} |
| :q! | quit w/o save |
| :10,20 w {file} | write line 10-20 to {file} |