List all links in your Zim notebook, prefixed with an E for existing or M for missing pages.
E
M
Download/clone this repository in your $XDG_DATA_HOME/zim/plugins (usually it is in ~/.local/share).
$XDG_DATA_HOME/zim/plugins
~/.local/share
Open a terminal and enter
$ zim --plugin linklist --notebook <notebook name>
Add --missing-only or --existing-only to list only dangling or existing pages.
--missing-only
--existing-only