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1. 从系统查看 1.1 uname -a 命令 [root@qs-dmm-rh2 ~]# uname -a Linux qs-dmm-rh2 2.6.18-194.el5 #1 SMP Tue Mar 16 21:52:43 EDT 2010 i686 i686 i386 GNU/Linux [root@qs-xezf-db2 ~]# uname -a Linux qs-xezf-db2 2.6.18-194.el5 #1 SMP Tue Mar 16 21:52:39 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux 1.2 file /bin/ls 命令 [root@qs-dmm-rh2 ~]# file /bin/ls /bin/ls: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped [root@qs-xezf-db2 ~]# file /bin/ls /bin/ls: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.6.9, dynamically linked (uses shared libs), for GNU/Linux 2.6.9, stripped 1.3 getconf LONG_BIT 命令 [root@qs-dmm-rh2 ~]# getconf LONG_BIT 32 [root@qs-xezf-db2 ~]# getconf LONG_BIT 64 1.4 arch命令 [root@qs-dmm-rh2 ~]# arch i686 [root@qs-xezf-db2 ~]# arch x86_64 2. 从CPU查看 [root@qs-dmm-rh2 ~]# cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l 0 [root@qs-xezf-db2 ~]# cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l 8 结果大于0, 说明支持64bit计算. lm指long mode, 支持lm则是64bit。 (责任编辑：IT) |