# vim > Vim (Vi IMproved), a command-line text editor, provides 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. > More information: <https://www.vim.org>. - Open a file: `vim {{path/to/file}}` - View Vim's help manual: `:help<Enter>` - Save and Quit: `:wq<Enter>` - Open a file at a specified line number: `vim +{{line_number}} {{path/to/file}}` - Undo the last operation: `u` - Search for a pattern in the file (press `n`/`N` to go to next/previous match): `/{{search_pattern}}<Enter>` - Perform a regex substitution in the whole file: `:%s/{{pattern}}/{{replacement}}/g<Enter>` - Display the line numbers: `:set nu<Enter>`