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; the normal mode (accessed via `<Esc>`) doesn't allow regular text editing.
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- Open a file:
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`vim {{file}}`
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- Enter text editing mode (insert mode):
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`<Esc> i`
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- Copy ("yank") or cut ("delete") the current line (paste it with `P`):
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`<Esc> {{yy|dd}}`
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- Undo the last operation:
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`<Esc> u`
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- Search for a pattern in the file (press `n` to go to the next result):
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`<Esc> /{{search_pattern}} <Enter>`
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- Perform a regex substitution in the whole file (from the start, `1`, to the end, `$`):
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`<Esc> :1,$s/{{pattern}}/{{replacement}}/g <Enter>`
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- Save (write) the file, and quit vim:
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`<Esc> :wq <Enter>`