The services database lists the names of TCP and UDP services and their well known port numbers; it is used by programs that call network services. The Solaris installation automatically creates the services database; it generally requires no administrative handling.
The services(4) man page contains complete syntax information. Example 4-11 shows an excerpt from a typical /etc/inet/services file:
# # Network services # echo 7/udp echo 7/tcp discard 9/udp sink null discard 11/tcp daytime 13/udp daytime 13/tcp netstat 15/tcp ftp-data 20/tcp ftp 21/tcp telnet 23/tcp time 37/tcp timeserver time 37/udp timeserver name 42/udp nameserver whois 43/tcp nickname |