kpc@kpc-desktop:~$ smbclient -U pi 192.168.0.3

192.168.0.3: Not enough '\' characters in service
Usage: smbclient [-?EgBVNkPeC] [-?|--help] [--usage]
        [-R|--name-resolve=NAME-RESOLVE-ORDER] [-M|--message=HOST]
        [-I|--ip-address=IP] [-E|--stderr] [-L|--list=HOST]
        [-m|--max-protocol=LEVEL] [-T|--tar=<c|x>IXFqgbNan]
        [-D|--directory=DIR] [-c|--command=STRING] [-b|--send-buffer=BYTES]
        [-t|--timeout=SECONDS] [-p|--port=PORT] [-g|--grepable]
        [-B|--browse] [-d|--debuglevel=DEBUGLEVEL]
        [-s|--configfile=CONFIGFILE] [-l|--log-basename=LOGFILEBASE]
        [-V|--version] [--option=name=value]
        [-O|--socket-options=SOCKETOPTIONS] [-n|--netbiosname=NETBIOSNAME]
        [-W|--workgroup=WORKGROUP] [-i|--scope=SCOPE] [-U|--user=USERNAME]
        [-N|--no-pass] [-k|--kerberos] [-A|--authentication-file=FILE]
        [-S|--signing=on|off|required] [-P|--machine-pass] [-e|--encrypt]
        [-C|--use-ccache] [--pw-nt-hash] service <password>
kpc@kpc-desktop:~$