sudo dpkg -i m.deb
Selecting previously unselected package nautilus-megasync.
(Reading database ... 173965 files and directories currently installed.)
Preparing to unpack m.deb ...
Unpacking nautilus-megasync (2.9.2) ...
dpkg: dependency problems prevent configuration of nautilus-megasync:
nautilus-megasync depends on megasync; however:
Package megasync is not installed.
dpkg: error processing package nautilus-megasync (--install):
dependency problems - leaving unconfigured
Processing triggers for libc-bin (2.23-0ubuntu3) ...
Processing triggers for hicolor-icon-theme (0.15-0ubuntu1) ...
Errors were encountered while processing:
nautilus-megasync