Bulk replacement in VI

(1) replace all files in VI in batches: % s # abc #123 # g (if there is # in the file, available/replaced ,: % s/abc/123/g) -- Note: replace abc with 123 (or: % s/str1/str2/g replace all str1 in the file with str2) 2) partial replacement in the file: 20, 30 s # abc #123...
(1) replace all files in VI in batches: % s # abc #123 # g (if there is # in the file, available/replaced ,: % s/abc/123/g) -- Note: replace abc with 123 (or: % s/str1/str2/g replace all str1 in the file with str2) 2) partial replacement in the file: 20, 30 s # abc #123 (such as # in the file, available/replaced,: % s/abc/123/g) -- Note: replace abc from 20 rows to 30 rows with 123