如何查看Linux是32位还是64位

getconf LONG_BIT
64/32

uname -a
Linux iZ25dmhrwpjZ 3.10.0-123.9.3.el7.x86_64 #1 SMP Thu Nov 6 15:06:03 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

file /bin/ls
/bin/ls: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, BuildID[sha1]=0xec333a104e045327c5e3d0ca6dda16c610a210f3, stripped

如何查看Linux是32位还是64位

原文：http://ouyangjun.blog.51cto.com/10284323/1734593