问题
Is there anything special about directories which start with a dot . in Linux (Ubuntu), such as ~/.vim?
Thanks.
回答1:
Files and directories whose names begin with a dot (.) by default are not displayed in directory listings by the standard command ls. Therefore, they are traditionally used to store settings, preferences, etc.. Directory ~/.vim in particular surely contains personal preferences and settings for the text editor vim.
There are also two special directory names in this class: the directory named simply . is an alias for the same directory in which it appears (a self reference), and the directory named .. refers to the parent directory of ..
Many graphical file browsers ignore the convention of hiding file names beginning with a ., so it is not necessarily correct any longer to call these files "hidden". Nevertheless, that terminology persists.
回答2:
In UNIX-like environments, a filename preceded by a dot indicates a hidden file. It's mainly a mechanism to decrease clutter in directory listings. You can get a listing of hidden files by passing the -a parameter to ls
回答3:
Those are hidden. You'd need to apply extra effort to see them.
来源：https://stackoverflow.com/questions/28972757/linux-directory-starting-with-dot