vim

move

1. gg/G: jump to top of content
2. 0/$: the begin of the line
3. 5gg: jump to line 5

edit

1. i/a: insert befor(after)current cursor position
2. o,O: insert below(above) current cursor
3. r/R: replace current character/ repace until esc
4. s/S: delte current character/line and start insert
5. [5]dd
6. dG: delte from current line to last
7. :1,4d,delet
8. D: delte to the end of line

undo, redo

undo: u redo: ctrl + r

mode

1. insert: i
2. normal : excute command; switch into other mode;
   1. p(P): paste the character after(before) current cursor;
3. visual: select characters;
   1. v: select mutiple characters
   2. V: select mutiple lines;