How to see whether a Linux system is 32-bit or 64-bit

1. #uname-A

If there's a x86_64, it's 64, and there's no 32-bit.

# uname-a

Linux Desktop 2.6.35-23-generic #37-ubuntu SMP Fri Nov 5 19:17:11 UTC all i686 gnu/linux

This is 32-bit.

#uname-A

Linux backup 2.6.9-67.ELSMP #1 SMP Wed Nov 7 13:58:04 EST. i686 i686 i386 Gnu/linux

Note: The ixxx are all 32-bit, with x86-64 all 64-bit

2. #file/sbin/init

/sbin/init:elf 32-bit LSB Shared object, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for gnu/li Nux 2.6.15, stripped

3. See how many bits the CPU is

More/proc/cpuinfo

4. $su-root

#file/sbin/init

/sbin/init:elf 32-bit LSB executable, Intel 80386, version 1 (SYSV),

That is, 32-bit Linux, 64-bit, which shows the 64-bit

How to see whether a Linux system is 32-bit or 64-bit