Very short introduction to Vi (by L. M. MacEwan on floppix.com)

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Using vi:

1. To start vi, type vi <filename>
2. To get into insert mode and start entering text into the document press:
   • i - to start inserting text before the cursor
   • a - to start inserting text after the cursor
   • I - to start inserting text at the beginning of the current line
   • A - to start inserting text at the end of the current line
   • o - to open up a new line and insert text on the new line
3. To get back to command mode:
   • press [Esc]
4. To delete:
   • make sure you are in command mode; press [Esc]
   • x - deletes the character at the cursor
   • dd - deletes the current line
   • D - deletes from the current postion in the line to the end of the line
   • dG - deletes to end of file
5. To undo a command:
   • u - undo the last command
6. To move a line or block of lines:
   • dd - deletes the line from the current postion
   • p - after moving to the new location; p will put the line(s) after the current line
   • 10dd - deletes 10 lines starting from the current postion
   • p - after moving to the new location; p will put all 10 lines after the current line
7. To copy a line
   • yy - deletes the line from the current postion
   • p - after moving to the new location; p will put the line(s) after the current line
8. To exit:
   • :q! - quit without saving
   • :q - quit
   • :wq - save the file and quit
   • :w - save the file without quitting

You are done with this small intro, good luck padawan!