Use Mac OS command key in bash's bind command In my ubuntu bash, I had remapped `Ctrl-y` key combo to copy text to clipboard as, bind -x '"\C-y": copy_line_from_x_clipboard' It works. Now, I am migrating to Macbook, I like to use `Command` key instead of `Ctrl` key above. I am not seeing any keybinding examples on net that contain Mac OS' command key. And I tried to get the key combo for `Command-y` using the command `sed -n l` as explained here, but it shows empty line after taking `Command-y` key input. For those who are interested, the callee function to paste text from clipboard is, copy_line_from_x_clipboard() { local n=$READLINE_POINT local l=$READLINE_LINE local s=$(xsel -ob) READLINE_LINE=${l:0:$n}$s${l:$n:$((${#l}-n))} #READLINE_LINE=${l:0:$n}$s READLINE_POINT=$((n+${#s})) }

According to one of the comments in _Use CMD-mappings in console Vim_ , you cannot use the `Command` key in Terminal.app, though you _could_ in iTerm2.

You're probably looking for _modifier_ , like `shift`, `control`, e.g., something analogous to the `alt` or `meta` key.

In Terminal.app's keyboard preferences, you have an initial set of key definitions which use these modifiers--along with `Option`. You can alter these definitions, or add new ones.

Here are a couple of screenshots showing that dialog:

![showing the keyboard preferences screen](

The second screenshot shows `Option` (alone, or in combination with other modifiers), but `Command` is not available for use by programs running in the terminal:

![showing the available modifiers for keys](