Call it with "--no-pager"
Without it, if the user has a pager (more/less/etc.) configured and
call vagrant up with NFS shares, systemctl would use the pager, and
that would probably require an unnecessary key press from the user.
In the case that NFS is already started on a Gentoo host, /etc/init.d/nfs start will not reload exports, but fail. /etc/init.d/nfs reload is known to fail for some esoteric configurations of /etc/exports, restart should be safe for existing connections.
To reload /etc/exports, /sbin/exportfs is best way
to command it in standard.
It modify generic linux to check daemon status
before restart instead of restarting everytime.
Signed-off-by: Hiroshi Miura <miurahr@linux.com>