How does Linux use shell to see if Linux is 32-bit or 64-bit?
This article mainly explains how Linux uses shell to check whether Linux is 32-bit or 64-bit. Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how to use shell to check whether Linux is 32-bit or 64".
Nowadays, most users use Windows system, and they all know that Windows system has 32-bit and 64-bit. In fact, Linux system also has 32-bit and 64-bit. Do you know how many bits your Linux system is? The editor will teach you how to use shell to see if Linux is 32-bit or 64-bit.
Manually check the number of system digits
To view the number of linux system bits, you can execute the following two commands respectively
Getconf WORD_BIT
The number of digits used to get word
Getconf LONG_BIT
The number of digits used to get long
For 64-bit systems, the above two commands should get 32 and 64, respectively.
There are many ways to judge whether a linux system is 32-bit or 64-bit. It is recommended to use getconf. However, some people think that getconf WORD_BIT=32 is 32-bit WORD_BIT=64 and getconf is 64bit. Please execute it on the 64bit machine, hehe. Getconf WORD_BIT shows the result or 32 why?
The int type and long type are generally 4 bytes in 32-bit systems and 4 bytes in 64-bit systems, but long has become available in 8-byte inux systems.
Get the number of digits of word and long with "getconf WORD_BIT" and "getconf LONG_BIT"
Shell judges the number of system digits
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
Add some other methods
Uname-a
32-bit: 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-bit: Linux demolinux 2.6.32-431.11.2.el6.x86_64 # 1 SMP Tue Mar 25 19:59:55 UTC 2014 x86 "64 GNU/Linux
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