https://lists.archlinux.org/pipermail/arch-general/2011-January/018357.html
[arch-general] [signoff] lvm2/device-mapper 2.02.82-1
device mapperarchgeneralsignoff
https://www.rpmfind.net/linux/rpm2html/search.php?query=device-mapper-libs
RPM resource device-mapper-libs
device mapperrpmresourcelibs
https://francoconidi.it/solved-procdevices-no-entry-for-device-mapper-found/device-mapper-2/
device-mapper.2 - Edmond's Weblog
device mapperedmondweblog