I have been tied up with other work and Holidays. Now back to some server work that is long overdue. I lost an old server yesterday so it is crunch time. I believe my new platform is suppose to be an x86_64. The order form says 64 bit. I booted Centos 6.3 i386 liveCD to check the system out before an install. uname -i reports i386 dmidecode -t processor reports Characteristics of 64 bit capable. The processor is an AMD duo-core Opteron. I thought that in a prior thread I found that booting with an i386 live CD and using uname would confirm the processor type. It seems not. I am going to go with the various evidence and start a x86_64 install, but what is with uname? thanks
On 04/10/2013 10:04 AM, Reindl Harald wrote:> > Am 10.04.2013 15:58, schrieb Robert Moskowitz: >> I believe my new platform is suppose to be an x86_64. The order form >> says 64 bit. >> >> I booted Centos 6.3 i386 liveCD to check the system out before an install. >> >> uname -i >> >> reports i386 > no wonder, you boot a i386 kernelOK. I can 'llive' with this. Just somewhere in some forgotten past I picked up that uname would still recognize that it was on a 64bit system even with the i386 kernel.> simply boot a x86_64 liveCD > hence i have not seen x86 systems since years > > Simply type "grep flags /proc/cpuinfo" and if you see lm > you have a 64 bit CPU based systemthanks> > [root at rh:~]$ grep flags /proc/cpuinfo | grep lm > 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 syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc > aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 > x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi > flexpriority ept vpid >
On 04/10/2013 09:58 AM, Robert Moskowitz wrote:> I have been tied up with other work and Holidays. Now back to some > server work that is long overdue. I lost an old server yesterday so it > is crunch time. > > I believe my new platform is suppose to be an x86_64. The order form > says 64 bit. > > I booted Centos 6.3 i386 liveCD to check the system out before an install. > > uname -i > > reports i386 > > dmidecode -t processor > > reports Characteristics of 64 bit capable. The processor is an AMD > duo-core Opteron. > > I thought that in a prior thread I found that booting with an i386 live > CD and using uname would confirm the processor type. It seems not. > > I am going to go with the various evidence and start a x86_64 install, > but what is with uname? > > thanksuname reports the architecture that the running operating system was compiled for. Since you booted an i386-compiled OS, it will report as such. To confirm the details of the hardware, examine /proc/cpuinfo . -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 555 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20130410/bc96691a/attachment.sig>
you can do this, cat /proc/cpuinfo Then, you can find the model of cpu, google it. ------------ Banyan He Blog: http://www.rootong.com Email: banyan at rootong.com On 4/10/2013 9:58 PM, Robert Moskowitz wrote:> I have been tied up with other work and Holidays. Now back to some > server work that is long overdue. I lost an old server yesterday so it > is crunch time. > > I believe my new platform is suppose to be an x86_64. The order form > says 64 bit. > > I booted Centos 6.3 i386 liveCD to check the system out before an install. > > uname -i > > reports i386 > > dmidecode -t processor > > reports Characteristics of 64 bit capable. The processor is an AMD > duo-core Opteron. > > I thought that in a prior thread I found that booting with an i386 live > CD and using uname would confirm the processor type. It seems not. > > I am going to go with the various evidence and start a x86_64 install, > but what is with uname? > > thanks > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >
On 04/10/2013 10:23 AM, Michael Mol wrote:> On 04/10/2013 09:58 AM, Robert Moskowitz wrote: >> I have been tied up with other work and Holidays. Now back to some >> server work that is long overdue. I lost an old server yesterday so it >> is crunch time. >> >> I believe my new platform is suppose to be an x86_64. The order form >> says 64 bit. >> >> I booted Centos 6.3 i386 liveCD to check the system out before an install. >> >> uname -i >> >> reports i386 >> >> dmidecode -t processor >> >> reports Characteristics of 64 bit capable. The processor is an AMD >> duo-core Opteron. >> >> I thought that in a prior thread I found that booting with an i386 live >> CD and using uname would confirm the processor type. It seems not. >> >> I am going to go with the various evidence and start a x86_64 install, >> but what is with uname? >> >> thanks > uname reports the architecture that the running operating system was > compiled for. Since you booted an i386-compiled OS, it will report as such.Ah. Got it.> To confirm the details of the hardware, examine /proc/cpuinfo .I have used cpuinfo a lot in the past, but recently I discovered dmidecode and find it very useful.
m.roth at 5-cent.us
2013-Apr-10 14:52 UTC
[CentOS] How to determine 64 vs 32 bit processor
Robert Moskowitz wrote:> On 04/10/2013 10:23 AM, Michael Mol wrote: >> On 04/10/2013 09:58 AM, Robert Moskowitz wrote:<snip>>> uname reports the architecture that the running operating system was >> compiled for. Since you booted an i386-compiled OS, it will report as >> such. > > Ah. Got it. > >> To confirm the details of the hardware, examine /proc/cpuinfo . > > I have used cpuinfo a lot in the past, but recently I discovered > dmidecode and find it very useful.Try installing lshw, too - the way and data it reports is slightly different than dmidecode, and in many cases more comprehensible.