(Reading database ... 74764 files and directories currently installed.)
Removing mongodb-org-server (3.4.1) ...
invoke-rc.d: unknown initscript, /etc/init.d/mongod not found.
dpkg: error processing package mongodb-org-server (--remove):
 subprocess installed pre-removal script returned error exit status 100
invoke-rc.d: unknown initscript, /etc/init.d/mongod not found.
dpkg: error while cleaning up:
 subprocess installed post-installation script returned error exit status 100
Removing libc-ares2:amd64 (1.10.0-2ubuntu0.1) ...
Removing libv8-3.14.5 (3.14.5.8-5ubuntu2) ...
Removing mongodb-org-mongos (3.4.1) ...
Removing mongodb-org-shell (3.4.1) ...
Removing mongodb-org-tools (3.4.1) ...
Processing triggers for libc-bin (2.19-0ubuntu6.6) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Errors were encountered while processing:
 mongodb-org-server
E: Sub-process /usr/bin/dpkg returned an error code (1)