where
An improved which.
where will identify a keyword (or builtin), a file, a function (and where it
was define) and an alias.
Install
Create a symbolic link to where in whatever directory you are using as your bin directory.
Example
$ where ls bad compgen gco gtoplevel
ls is hashed (/bin/ls)
bash: type: bad: not found
compgen is a shell builtin
gco 132 /home/harleypig/projects/dotfiles/.bash_sources.d/git
gtoplevel 18 /home/harleypig/projects/dotfiles/.bash_sources.d/git