Hi All,

I have fedora-5 installed in my system, is there any way to find out whether the processor is 64-bit or 32-bit.
I know that the OS is 32-bit for sure.

Can anybody help me in knowing the output of the following command on a 64-bit processor system:

uname -p
uname -m

Thanks,
Abha.

uname will give you the operating system. For example x86_64 is a 64 bit system. For cpu info ...
cat /proc/cpuinfo

I tried out this but nowhere i am getting any information as to what bit processor it is. When I run this command I get the following output:

$ cat /proc/cpuinfo

processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Pentium(R) 4 CPU 2.80GHz
stepping : 9
cpu MHz : 2793.102
cache size : 1024 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep 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 cid cx16 xtpr lahf_lm
bogomips : 5592.47

Thanks,
Abha.

this is a 64 bit CPU, in your /proc/cpuinfo in flags section there is lm that's mean that your CPU support long mode, and this capability is available only for 64 CPU

Thanks a lot for such a quick reply.

Hi.
Can anyone point to a list of what all the stuff proc/cpuinfo writes actually mean?... Now I know that lm=Long mode. But what about the rest of the flags, and the family / model numbers?

View the kernel source tree..
/usr/include/asm/cpufeature.h

Here's an example of what it would look like...
http://www.linuxforums.org/forum/mis...nfo-flags.html

Here's another thread on the LQ forum...
http://www.linuxquestions.org/questi...lag-lm-358563/

It's good to search first and ask if you can't find it.

Family and model come from intel's web site or others that list cpu's.