Determine 64 or 32 bit Unix Kernel and HW

Question: How to determine if I'm running 64 bit Unix Kernel ? Answer: User the following commands AIX getconf -a | grep KERN SOLARIS isainfo -vk HP-UX getconf KERNEL_BITS LINUX getconf LONG_BIT Question: How to determine if my Unix Hardware is 64 bit ? Answer: Use the following commands to determine the Hardware Architecture AIX bootinfo -y SOLARIS isainfo -vk HP-UX getconf HW_CPU_SUPP_BITS or getconf HW_32_64_CAPABLE If the above command returns 1, hardware supports both 32 and 64 bit binaries LINUX grep flags /proc/cpuinfo If the output of the above command contains the string "lm", Hardware is 64 bit. Example: flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni monitor ds_cpl est cid cx16 xtpr lahf_lm Note: 64 bit capable Hardware does not mean your OS is 64 bit. Generally, for backward compatibility, 64 bit capable Hardware can run 32 bit Software.