Voir limites :

• https://en.wikipedia.org/wiki/32-bit_computing
• https://en.wikipedia.org/wiki/2_GB_limit
• https://en.wikipedia.org/wiki/3_GB_barrier
• https://learn.microsoft.com/en-us/windows/win32/memory/memory-limits-for-windows-releases

uname -a
getconf LONG_BIT
grep flags /proc/cpuinfo
grep -o -w 'lm' /proc/cpuinfo | sort -u

OS 32 ou 64 bits ?

arch
echo $HOSTTYPE
 
hostnamectl