unix cpu info

find number of cpu's and cores in Solaris;

cpu_info|grep core_id|sort -u|wc -l
4

>psrinfo -pv
The physical processor has 8 virtual processors (0-7)
SPARC64-VII (portid 1024 impl 0x7 ver 0xa1 clock 2750 MHz)

sockets:

echo "`psrinfo -p` socket(s)"

In RHEL:
$ grep processor /proc/cpuinfo