How to check Memory size on Unix

2 check memory Size on Solaris:

#dmesg |grep mem #/usr/platform/sun4u/sbin/prtdiag |grep Memory # prtconf -v |grep Mem HP-UX # dmesg |grep Physical # print_manifest |grep –i memory AIX #bootinfo -r #lsattr -El sys0 -a realmem #getconf REAL_MEMORY Linux #dmesg |grep -i memory #cat /proc/meminfo |grep -i memtotal # free # free -m