Shell Judge Linux System 32-bit or 64-bit command

In the previous article introduced the Shell to judge the various versions of Debian methods, in the actual use, the judge system is 32-bit or 64-bit is often used, today to introduce the content.

Manually view the number of system digits

To view the number of Linux system digits, you can perform the following two commands individually

Getconf Word_bit

Used to get the number of digits in Word

Getconf Long_bit

The number of digits used to get long

For 64-bit systems above two commands should be 32 and 64 respectively.

To determine whether the Linux system is 32-bit or 64-bit has a lot of methods, recommended with getconf, however, some people think getconf word_bit=32 is 32bit,getconf word_bit=64 is 64bit, please go to 64bit machine execution, hehe. Getconf word_bit Show results or 32,why?

In a 32-bit system, the int and long types are typically 4 bytes, and the 64-bit system is of type int or 4 bytes, but long has become a 8-byte inux system that can be
Use "getconf word_bit" and "getconf long_bit" to get the digits of WORD and LONG

Shell determines the number of digits in the system

Ldconfig
If [$ (getconf word_bit) = ' $ '] && [$ (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

Add some other way

Uname-a

32 bits: 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 bits: Linux demolinux 2.6.32-431.11.2.el6.x86_64 #1 SMP Tue Mar 19:59:55 UTC 2014 x86_64 x86_64 x86_64 gnu/linux