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Linux如何使用shell辨别系统位数

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　　现在绝大多数用户使用的是Windows系统，都知道Windows系统有分32位和64位，其实Linux系统也有32位和64位之分，你知道你的Linux系统是几位的吗？下面小编就教你如何使用shell查看Linux是32位还是64位。

　　手动查看系统位数

　　查看linux系统位数，可以分别执行以下两个命令

　　getconf WORD_BIT

　　用于获取word的位数

　　getconf LONG_BIT

　　用于获取long的位数

　　对于64位系统以上两个命令应该分别得到32和64。

　　判断linux系统是32位还是64位有很多方法，推荐用getconf，然而有人认为getconf WORD_BIT=32则是32bit，getconf WORD_BIT=64则是64bit，请去64bit机器上执行，呵呵。getconf WORD_BIT显示结果还是32，why？

　　32位的系统中int类型和long类型一般都是4字节，64位的系统中int类型还是4字节的，但是long已变成了8字节inux系统中可

　　用”getconf WORD_BIT”和”getconf LONG_BIT”获得word和long的位数

　　shell判断系统位数

　　ldconfig

　　if ［ $（getconf WORD_BIT） = ‘32’ ］ && ［ $（getconf LONG_BIT） = ‘64’ ］ ; then

　　ln -s /usr/local/mysql/lib/mysql /usr/lib64/mysql

　　else

　　ln -s /usr/local/mysql/lib/mysql /usr/lib/mysql

　　fi

　　补充一些其它方法

　　uname -a

　　32位：Linux localhost.localdomain 2.6.32-431.17.1.el6.i686 #1 SMP Wed May 7 20:52:21 UTC 2014 i686 i686 i386 GNU/Linux

　　64位：Linux demolinux 2.6.32-431.11.2.el6.x86_64 #1 SMP Tue Mar 25 19:59:55 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

　　上面就是Linux使用shell查看Linux32位和64位的方法介绍了，除了使用shell查看，你还能手动执行命令查看系统位数。

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