$ grep "CONFIG_64" /lib/modules/*/build/.config
# CONFIG_64BIT is not set

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!

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

另一个容易确定的有用命令如下:

命令:

getconf LONG_BIT

答:

32，如果OS为32位 如果OS为64位，则为64位

#include <stdio.h>

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

如果一个二进制文件在可用的二进制文件中受到严重限制(例如在initramfs中)，我的同事建议:

$ ls -l /lib*/ld-linux*.so.2

在我的ALT Linux系统中，i586有/lib/ld-linux.so。2和x86_64有/lib64/ld-linux-x86-64.so.2。