$ ceph-deploy install mon-0
.................................
[mon-2][DEBUG ] ceph-common (9.2.0-1trusty) 설정하는 중입니다 ...
[mon-2][DEBUG ] Setting system user ceph properties..
[mon-2][ERROR ] RuntimeError: command returned non-zero exit status: 100
[ceph_deploy][ERROR ] RuntimeError: Failed to execute command: env DEBIAN_FRonTEND=noninteractive DEBIAN_PRIORITY=critical apt-get --assume-yes -q --no-install-recommends install ca-certificates apt-transport-https
해결)
