3

I'm wondering why it is required to put ~/ before .bashrc when opening the bashrc file.

To illustrate:

I normally open files on my system as follows:

vim filename.extension 

But while in the /home directory if I do the following:

vim .bashrc 

vim will open a new file called .bashrc

In order to open my bashrc file I must do as follows:

vim ~/.bashrc

Why?

My current system is Linux Mint 18.3

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  • You can save the file (:w) and see where it was saved. That should be the directory where you opened vim.
    – Al.G.
    Jun 13 '18 at 9:48
  • ~ is expanded to your home directory, so it doesn't make sense. Are you sure your $PWD is the same as your $HOME?
    – choroba
    Jun 13 '18 at 9:49
  • @choroba I made a mistake and was not aware that ~ gets expanded to home directory (i.e. /home/username). Thanks for your help
    – MarkMark
    Jun 13 '18 at 13:07
  • 1
    note: it is filename not filename.extension Unix does not have file extensions. a . us just a .. Except when the . is the first character, in this case it tells ls not to list it (it is hidden). Jun 13 '18 at 14:18
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    /home is not the home you are looking for. $HOME is where the home is. Your home will (probably) be /home/yourname. Jun 13 '18 at 14:20
21

Your difficulty might come from this:

while in the /home directory

.bashrc isn’t in /home, it’s in your home directory (often /home/username, and yes, it’s confusing), which you can go to by typing

cd

Once you’re there,

vim .bashrc

will open the existing file.

Always using

vim ~/.bashrc

means you never need to think about where you are ;-).

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  • 2
    More intuitive when the users' directories were in /usr ;-)
    – Kusalananda
    Jun 13 '18 at 9:53
  • @Kusalananda when was that using Nux for 10 years never seen this
    – Kiwy
    Jun 13 '18 at 10:20
  • 2
    @Kiwy early seventies, see Wikipedia’s entry on /usr. Jun 13 '18 at 10:22
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    @Kiwy Some FreeBSD systems use /usr/home/username for the home of username.
    – Kusalananda
    Jun 13 '18 at 10:38
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    Staying closer to the present day, a modern MacOS user's home directory is not /home/$USER but /Users/$USER
    – Law29
    Jun 13 '18 at 18:18
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The ~ or ~/ refers to the absolute path of your home directory a.k.a. /home/username.


Additionally, if you try cd ~ or cd ~/ they will both do the same thing; the shortest option being simply cd. All three options take you to your home directory. NOT /home.


Since .bashrc is located in your home directory, you must specify its location by adding the tilde, which allows you to point to home directory from wherever you are and thus access the .bashrc.

Of course, this works for any other files and folders located in your ~, for example:

  • cd ~/myFolder
  • ~/myScript.sh

What you were trying to do is open .bashrc, but since vim checks in your current location if the file already exists or not, it will create a new .bashrc file in your current pwd, since there is no current .bashrc where you were trying to open it.

In other words, if you were in /home/username/someFolder/someSubFolder, doing the vim .bashrc command will create a new .bashrc file, since there is no already existing .bashrc and you did not point to the right path, which is /home/username/.bashrc (or ~/.bashrc).

2
  • that was a really helpful and informative answer. I understand it now.
    – MarkMark
    Jun 13 '18 at 13:17
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    The key insight is that /home should not be any account's home directory. It is the parent of most home directories (and the grandparent of Likewise users' home directories, at least in the implementation we use at work, where /home/MYDOMAIN/* is where the home directories for AD user in the MYDOMAIN domain reside). Jun 13 '18 at 16:39

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