How do I check the validity of /etc/passwd in Linux?

petulia3478

# /usr/sbin/pwck
user adm: directory /var/adm does not exist
user uucp: directory /var/spool/uucp does not exist
user gopher: directory /var/gopher does not exist
user pcap: directory /var/arpwatch does not exist
user sabayon: directory /home/sabayon does not exist
pwck: no changes

If there are no errors, a prompt is returned:

# /usr/sbin/pwck