After a System upgrade from Ubuntu Precise Pangolin to Trusty Tahr I wasn’t able to connect to the server using SMB. The server is part of a active directory. Reading the documentation through, I figured out that wbinfo worked flawless, but the user was not found when using id.

$ wbinfo -u
my.user
guest
...

$ id my.user
id: my.user: no such user

/etc/nsswitch.conf need be configured right (winbind must be configured), but it was in my case:

passwd: compat winbind
group: compat winbind
shadow: compat
...

Using strace, I figured out that libnss_winbind.so.2 wasn’t found by id. In the end, the solution was easy as that:

$ sudo apt-get install libnss-winbind
...
$ sudo service winbind restart
winbind stop/waiting
winbind start/running, process 3399
$ id my.user
uid=10006(my.user) gid=10002(domain user) groups=...