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 Helpful documents:<br />
7 - [Roman Zolotarev: Edit text with vi(1)](https://rgz.ee/vi.html)<br />
8 - [Jeff W: vi help](http://www.jeffw.com/vi/vi_help.txt)<br />
9 - [ViEmu: Graphical vi cheatsheet](http://www.viemu.com/a_vi_vim_graphical_cheat_sheet_tutorial.html)
10 
11 #### Yank / delete an arbitrary number of lines
12 
13 	1) mark the first line: mk
14 	2) move to last line
15 	3a) yank: y'k
16 	3b) delete: d'k
17 	4) move to new line
18 	5) paste with P or p
19 
20 #### Apply regex to an arbitrary number of lines
21 
22 	1) mark the first line: mk
23 	2) mark the last line: ml
24 	:'k,'ls/regex/power/g
25 
26 #### Add # to block of text
27 
28 	:'k,'ls/.*/#&/
29 
30 #### Remove trailing whitespace of block of text
31 
32 	:'k,'ls/\ *$//
33 
34 #### Write file as root
35 
36 	:w !doas tee %
37 
38 #### Diff the file on disk with the file in the buffer
39 
40 	:w !diff -u % -
41 
42 #### Make a backup of the file on disk
43 
44 	:!cp % %.bak
45 
46 #### Sort all lines
47 
48 	:%!sort
49 
50 #### Sort paragraph
51 
52 	!}sort
53 
54 #### Uniq all lines
55 
56 	:%!uniq
57 
58 #### Uniq paragraph
59 
60 	!}uniq
61 
62 #### Join all lines
63 
64 	:%j
65 
66 #### Select a column (3rd) from formated text seperated by ':' 
67 
68 	:%!awk -F':' '{print $3}' 
69 
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