[uname] Find out system Architecture (32-bit vs. 64-bit)

uname # Operating System
uname -a # Kernel version and System Architecture
uname -m # Machine hardware name, tells whether system is 32-bit or 64-bit
uname -p # Processor type (usually unknown on modern Unix)
  • i686 or i386 is 32-bit
  • x86_64 is 64-bit
uname -a
# Ubuntu 20.04 inside WSL2 on a Windows machine - 64bit
Linux Panda 4.19.104-microsoft-standard #1 SMP Wed Feb 19 06:37:35 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux


# Orange Pi Plus 2 running Armbian

aamnah@orangepiplus:~$ uname

aamnah@orangepiplus:~$ uname -a
Linux orangepiplus 3.4.113-sun8i #18 SMP PREEMPT Wed Jan 24 22:10:49 CET 2018 armv7l armv7l armv7l GNU/Linux

aamnah@orangepiplus:~$ uname -m

aamnah@orangepiplus:~$ uname -p
  • FYI, ARM v7 (and below) is 32-bit. ARM v8 introduced the 64-bit istruction set.