tldr/pages/common/vim.md

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# vim
> Vi IMproved, a programmer's text editor, providing several modes for different kinds of text manipulation.
> Pressing `i` enters edit mode. `<Esc>` goes back to normal mode, which doesn't allow regular text insertion.
- Open a file:
`vim {{file}}`
- Enter text editing mode (insert mode):
`<Esc>i`
- Copy ("yank") or cut ("delete") the current line (paste it with `P`):
`<Esc>{{yy|dd}}`
- Undo the last operation:
`<Esc>u`
- Search for a pattern in the file (press `n`/`N` to go to next/previous match):
`<Esc>/{{search_pattern}}<Enter>`
- Perform a regex substitution in the whole file:
`<Esc>:%s/{{pattern}}/{{replacement}}/g<Enter>`
- Save (write) the file, and quit:
`<Esc>:wq<Enter>`
- Quit without saving:
`<Esc>:q!<Enter>`