April 10, 2018
What are Dotfiles?
For those readers, who are not already familiar with the concept of Dotfiles,
Dotfiles literally means files with names starting with a “.”, however, these
files are somewhat special under UNIX environment, as they are hidden. They
are used by a lot of softwares to customize the behaviour according to the
needs of user at the runtime. Therefore, these files can also be called
Runtime Configuration files. Generally, these files are found directly under
user’s home directory, however, some softwares prefer to place them under
folders. Now-a-days, a lot of softwares are using $XDG_CONFIG_HOME
directory, which by default is
~/.config directory. The files are mostly
regular text files which can be edited by any kind of text editor. Some
softwares though, prefer to generate these files using some sort of utility,
lxappearance for GTK themes.
Why is it important to manage Dotfiles?
Usually, under Linux environment, most of the customization you do on various softwares, all stay under your home directory in the form of dotfiles. So, if you want to move your settings/customization to other system or preserve them while re-installing or changing the distributions, for the most part you just have to keep the dotfiles in place and all your customizations will be preserved. For example, you want to preserve the terminal colors in your terminal or your email client configuration or your Bash prompt and aliases. All these are stores in the form of dotfiles.
Ways of managing Dotfiles
As I mentioned above, Dotfiles are scattered over different directories under user’s home directory and to manually manage each file individually is harder. So, what we can do is place all the dotfiles under a folder and then create symlinks, whereever the software expects the dotfiles. But again manually creating and updating symlinks is mundane. Fortunately, GNU has a tool for this purpose, Stow. Stow, according to GNU is a symlink farm manager, original purpose of it is to keep track of various versions of softwares installed on the system. However, for our purpose it is a perfect tool.
There are various other ways used by others to accomplish the same task, which are nicely listed at Dotfiles page which you might want to check.
Using GNU Stow
First, install GNU Stow using the package manager of your distribution. Most popular distributions have it in there official repositories.
$ apt-get install stow
$ apt-get install stow
$ yum install stow
Then you need to create a directory which will act as a central place to store all the actual dotfiles. Note that this directory needs to be a direct sub-directory of home directory, otherwise you’ll have to provide additional options to GNU Stow.
$ mkdir ~/.dotfiles
Now, for each software you want to add dotfiles of, make a directory under
~/.dotfiles. So, let’s say you want to add Vim’s configuration files then
you need to create
$ mkdir ~/.dotfiles/vim
Now, move all the files concerned with Vim, under this directory keeping the
folder structure same as under home directory. So,
~/.vimrc will go in
~/.vim/<filename> will go in
~/.dotfiles/vim/.vim/<filename> and so on.
Once all files are in the sub-directory of
~/.dotfiles folder, to enable the
symlinks first go to the
.dotfiles directory and run
stow with program name,
in this case vim as argument.
$ cd ~/.dotfiles $ stow vim
And Stow will automatically create all the symlinks for you. To verify go to the home directory and run ls.
$ ls -l ~/.vimrc lrwxrwxrwx 1 elliot elliot 20 Mar 15 20:00 .vimrc -> .dotfiles/vim/.vimrc
In case you want to remove the symlinks of the software, simply run the same
stow command with
-D option and program name as arguments in the
$ cd ~/.dotfiles $ stow -D vim
As all our actual files are under
.dotfiles directory, we can use Git to
version control and transfer new changes across multiple machines. To do so,
first initiate Git repository.
$ cd ~/.dotfiles $ git init
Next, add all the files and commit them.
$ git add . $ git commit -m "Initial Commit"
Now, you can simply push it to a Git Hosting service such as Github and make all your machines clone it. This will also enable you to push and fetch changes immediately from any machine of yours.