我已经顺利升级到 16.04，除了 samba 没有启动外，一切都正常：
$ sudo /etc/init.d/smbd status
? smbd.service - LSB: start Samba SMB/CIFS daemon (smbd)
Loaded: loaded (/etc/init.d/smbd; bad; vendor preset: enabled)
Active: failed (Result: exit-code) since Mon 2016-04-25 21:43:03 EET; 23min ago
Docs: man:systemd-sysv-generator(8)
Process: 1954 ExecStart=/etc/init.d/smbd start (code=exited, status=1/FAILURE)
Apr 25 21:43:02 home systemd[1]: Starting LSB: start Samba SMB/CIFS daemon (smbd)...
Apr 25 21:43:03 home smbd[1954]: * Starting SMB/CIFS daemon smbd
Apr 25 21:43:03 home smbd[1954]: ...fail!
Apr 25 21:43:03 home systemd[1]: smbd.service: Control process exited, …