Bash это каталог ошибка

This is really confusing…

I currently have a Debian 8 computer, and I connect to it using PuTTY (SSH).
The default console used is Bash.

When I try to pass a path to an alias, it gives the following error:

 -bash: /: Is a directory

Here is an example:

Also, there’s a bizarre behaviour: running '/' or "/" cause the same error, as if Bash were ignoring quotes.

If it matters, the alias explorer was defined like this:

alias explorer='pcmanfm 1>/dev/null 2>&1 &'

Is this the expected behaviour?
If not, what am I doing wrong?

TLDR: Create ~/.bash_completion.d directory instead and reference it wherever it’s relevant.

Following up as I stumbled upon the exact same scenario and wanted to figure out how to process this properly.

For information, I’m running Linux Mint (Debian based).

In .bash_profile, there is this line:

[ -f /etc/bash_completion ] && source /etc/bash_completion

The sourced file contains:

. /usr/share/bash-completion/bash_completion

So far, we got pretty much the same behavior. It’s just not handled the same way.

Now, since this is default, it’s better not to touch anything to avoid extra issues. Most Linux distributions assume that ~/.bash_completion is a file with user-defined completions, not a directory.

And there is this (kind of?) convention for creating directory suffixed with .d in their name to make things explicit and prevent conflicts (such as our).

The solution would then to be:

mkdir -p ~/.bash_completion.d
mv ~/.bash_completion/* ~/.bash_completion.d
rm ~/.bash_completion
vim ~/.bashrc

Once the editor is open, update the path from:

source ~/.bash_completion/alacritty

to:

source ~/.bash_completion.d/alacritty

Reload and you should be good to go no matter the distribution you’re working on

Apparently one of your modifications to .bashrc introduced an error that treats /bin like something other than a directory (for example, by trying to run it as an executable file, read data from or write data to it as a file, etc.). Because .bashrc runs when your interactive shell starts, the error message always appears.

You may be able to identify the error yourself by looking through your modifications to .bashrc.

^{(Otherwise, to identify the specific problem it will be necessary to see the contents of your .bashrc file. You can copy its entire contents to the clipboard and paste it into your question, select it in your question, and format it as code with Ctrl+K. If you’ve made this file, much, much longer than it usually is, it might be too long to put into your question in its entirety. In that case, you can post it at http://paste.ubuntu.com and edit your question to include a link to the posting.)}

One possibility is that you may have introduced a space in a path starting with /bin. For example, near the beginning of the default .bashrc file is the code:

# make less more friendly for non-text input files, see lesspipe(1)
[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

If you accidentally put a space after /bin (in SHELL=/bin/sh), this might produce such an error.

That is just one example, and not necessarily the most likely one.