Install DELL Open Manage for Debian 8 / Proxmox 4.x

echo 'deb http://linux.dell.com/repo/community/ubuntu jessie openmanage' >/etc/apt/sources.list.d/linux.dell.com.sources.list
gpg --keyserver pool.sks-keyservers.net --recv-key 1285491434D8786F
gpg -a --export 1285491434D8786F | apt-key add -

apt-get update
apt-get install srvadmin-all