/usr/lib/amanda/rest-server/ is in amanda-common 1:3.5.1-1build2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/amanda/rest-server/bin/
/usr/lib/amanda/rest-server/bin/app-dancer2.pl
/usr/lib/amanda/rest-server/bin/app.pl
/usr/lib/amanda/rest-server/config-dancer/
/usr/lib/amanda/rest-server/config-dancer/config.yml
/usr/lib/amanda/rest-server/config.yml
/usr/lib/amanda/rest-server/environments/
/usr/lib/amanda/rest-server/environments/development.yml
/usr/lib/amanda/rest-server/environments/production.yml
/usr/lib/amanda/rest-server/lib/
/usr/lib/amanda/rest-server/lib/Amanda/
/usr/lib/amanda/rest-server/lib/Amanda/Rest.pm
/usr/lib/amanda/rest-server/public/
/usr/lib/amanda/rest-server/public/404.html
/usr/lib/amanda/rest-server/public/500.html
/usr/lib/amanda/rest-server/public/css/
/usr/lib/amanda/rest-server/public/css/error.css
/usr/lib/amanda/rest-server/public/css/style.css
/usr/lib/amanda/rest-server/public/dispatch.cgi
/usr/lib/amanda/rest-server/public/dispatch.fcgi
/usr/lib/amanda/rest-server/public/favicon.ico
/usr/lib/amanda/rest-server/public/images/
/usr/lib/amanda/rest-server/public/images/perldancer-bg.jpg
/usr/lib/amanda/rest-server/public/images/perldancer.jpg
/usr/lib/amanda/rest-server/public/javascripts/
/usr/lib/amanda/rest-server/public/javascripts/jquery.js
/usr/lib/amanda/rest-server/views/
/usr/lib/amanda/rest-server/views/index.tt
/usr/lib/amanda/rest-server/views/layout/
/usr/lib/amanda/rest-server/views/layout/main.tt