关于答案“getconf LONG_BIT”。

我用C语言写了一个简单的函数:

/*
 * check_os_64bit
 *
 * Returns integer:
 *   1 = it is a 64-bit OS
 *   0 = it is NOT a 64-bit OS (probably 32-bit)
 *   < 0 = failure
 *     -1 = popen failed
 *     -2 = fgets failed
 *
 * **WARNING**
 * Be CAREFUL! Just testing for a boolean return may not cut it
 * with this (trivial) implementation! (Think of when it fails,
 * returning -ve; this could be seen as non-zero & therefore true!)
 * Suggestions?
 */
static int check_os_64bit(void)
{
    FILE *fp=NULL;
    char cb64[3];

    fp = popen ("getconf LONG_BIT", "r");
    if (!fp)
       return -1;

    if (!fgets(cb64, 3, fp))
        return -2;

    if (!strncmp (cb64, "64", 3)) {
        return 1;
    }
    else {
        return 0;
    }
}

“getconf”是个好主意!

你也可以使用环境变量进行检查:

echo $HOSTTYPE

结果:

I386 -> 32位

X86_64 -> 64位

摘自:http://www.sysadmit.com/2016/02/linux-como-saber-si-es-32-o-64-bits.html

#include <stdio.h>

int main(void)
{
    printf("%d\n", __WORDSIZE);
    return 0;
}

首先你必须下载虚拟盒子。然后选择new和32位Linux。然后使用它引导linux。如果它启动，那么它是32位的，如果它不启动，那么它是64位的。

简单的脚本获得64位或32位

        if $(getconf LONG_BIT | grep '64'); then
           echo "64 bit system"
        else
            echo "32 bit system"
        fi

lscpu会列出关于你的CPU的其他信息:

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
...