Can someone explain what libwbclient.so.0 does? On Ubuntu 18.04, the libwbclient0 package is a dependency of cifs-utils and anything winbind related. They also include a package called libwbclient-ssd; the difference seems to most in the location of the library? root at kraken:~# dpkg -L libwbclient0 .. /usr/lib/x86_64-linux-gnu/libwbclient.so.0.14 /usr/lib/x86_64-linux-gnu/samba /usr/lib/x86_64-linux-gnu/samba/libreplace.so.0 /usr/lib/x86_64-linux-gnu/samba/libwinbind-client.so.0 .. /usr/lib/x86_64-linux-gnu/libwbclient.so.0 root at roadrunner:~# dpkg -L libwbclient-sssd .. /usr/lib/x86_64-linux-gnu/sssd/modules/libwbclient.so.0.14.0 .. /usr/lib/x86_64-linux-gnu/sssd/modules/libwbclient.so.0 .. Originally we thought our problems with sssd + Samba were related to this library, but turns out this appears to be unrelated: I can mount shares with either library installed (and haven't tried installing both on the same machine. This begs the question, what is this needed for and why is there a separate (and apparently largely undocumented) version specific to sssd?