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So I've got this old Toshiba Satellite Pro A100 that I'd like to try installing a more modern OS on, but I'm not sure whether it will run 64-bit OS's, or whether I need to stick to 32-bit (like [Mint 19.3 Xfce 32-bit][1]). I got this out from the system info on this machine, which is currently running an ancient version of Linux Mint:[^a]

Name		: Intel(R) Celeron(R) M processor         1.40GHz
Family, model, stepping		: 6, 13, 8 (Pentium III/Pentium III Xeon/Celeron)
Vendor		: Intel
Cache Size		: 1024kb
Frequency		: 1393.30MHz
BogoMIPS		: 2786.59
Byte Order		: Little Endian
FDIV Bug		: no
HLT Bug		: no
F00F Bug		: no
Coma Bug		: no
Has FPU		: yes
Cache information not available
fpu		: Floating Point Unit
vme		: Virtual 86 Mode Extension
de		: Debug Extensions - I/O breakpoints
pse		: Page Size Extensions (4MB pages)
tsc		: Time Stamp Counter and RDTSC instruction
msr		: Model Specific Registers
pae		: Physical Address Extensions
mce		: Machine Check Architeture
cx8		: CMPXCHG8 instruction
apic		: Advanced Programmable Interrupt Controller
mtrr		: Memory Type Range Registers
pge		: Page Global Enable
mca		: Machine Check Architecture
cmov		: Conditional Move instruction
clflush		: Cache Line Flush instruction
dts		: Debug Store
acpi		: Thermal Monitor and Software Controlled Clock
mmx		: MMX technology
fxsr		: FXSAVE and FXRSTOR instructions
sse		: SSE instructions
sse2		: SSE2 (WNI) instructions
ss		: Self Snoop
tm		: Thermal Monitor
pbe		: Pending Break Enable
up		: smp kernel running on up
bts		: Branch Trace Store

Thanks for any help with this (a bit lame for a question, I know, but it's a genuine one)!

[^a]: V. 13 "Maya" Xfce, released 21.07.2012, reached EOL 04.2017—FWIW.
Top Answer
Jack Douglas
The list of capabilities you have there is the list of flags in the output of `/proc/cpuinfo`:

$ cat /proc/cpuinfo  | grep flags
flags           : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36 clflush mmx fxsr sse sse2 syscall nx lm rep_good nopl xtopology cpuid tsc_known_freq pni cx16 x2apic hypervisor lahf_lm cpuid_fault pti

You [are looking for]( `lm`, which isn't present I'm afraid, so your CPU is 32-bit only.

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