1 # Why vi Rocks
2 
3 A collection of commands, command sequences in [vi(1)](https://man.openbsd.org/vi.1)/[ex(1)](https://man.openbsd.org/ex.1) or with 3rd party unitilities.<br />
4 These all work with at least [nvi](https://en.wikipedia.org/wiki/Nvi) 1.79 and 2.1.3 (unicode).
5 
6 #### Yank / delete an arbitrary number of lines.
7 
8 	1) mark the first line: mk
9 	2) move to last line
10 	3a) yank: y'k
11 	3b) delete: d'k
12 	4) move to new line
13 	5) paste with P or p
14 
15 #### Join all lines in a file
16 
17 	:%j
18 
19 #### When you need root permissions to write the file
20 
21 	:w !doas tee %
22 
23 #### Diff the file on disk with the file in cache
24 
25 	:w !diff -u % -
26 
27 #### Make a backup of the file on disk
28 
29 	:! cp % %.bak
30 
31 #### Sort lines
32 
33 	:%!sort
34 
35 #### Dedup lines
36 
37 	:%!uniq
38 
39