v im batch replacement:
%s/source_pattern/target_pattern/g
If you want to replace all usernames with login_name, then: %s/username/login_name/g will do.
vim column editor:
Column delete ctrl+v, d after selection
Insert ctrl+v into the column, shift+i after selection, ESC after editing
Column replacement ctrl+v, s after selection, ESC after editing
Column copy ctrl+v, y after selection
column paste p
1. Column deletion
Operating procedures:
ctrl+v enters the visual operation mode
Use hjkl to control the up, down, left, and right directions to select the part to be deleted
Finally, enter d to delete
2. Batch insert a character Y000000 in the selected column
Operating procedures:
ctrl+v enters the visual operation mode
Use hjkl to control the up, down, left, and right directions to select the position to be inserted
Type an uppercase I (shift+i or CAPSLOCK i) followed by the character you want to type
After inputting, press the ESC key to end, and the currently selected column will insert the entered characters.
Batch replace the selected part with characters 99999
Operating procedures:
ctrl+v enters the visual operation mode
Use hjkl to control the up, down, left, and right directions to select the part to be deleted
Then enter the letter s, and then enter the character to be entered
After inputting, end with the ESC key, and the selected part will be replaced with the entered characters. A replacement operation is a bit like a combination of deletion and insertion.