Linux ÅжϻúÆ÷µÄ×Ö½Ú˳Ðò
#include <fcntl.h>
int main(void)
{
typedef union un{
short s;
char c[sizeof(short)];
}un;
un myun;
myun.s = 0x0102;
if(sizeof(short) == 2){
if(myun.c[0] == 1 && myun.c[1] == 2)
printf("big-endian\r\n");
else if(myun.c[0] == 2 && myun.c[1] == 1)
printf("little-endian\r\n");
else
printf("unkown\r\n");
}
return 0;
}
Õª×Ô¡¶Unix ÍøÂç±à³Ì¡·
Ïà¹ØÎĵµ£º
http://www.softhouse.com.cn/linux/knowledge/tech/7320.html
......
Unix/LinuxÏÂÒ»°ãÏëÈÃij¸ö³ÌÐòÔÚºǫ́ÔËÐУ¬ºÜ¶à¶¼ÊÇʹÓà & ÔÚ³ÌÐò½áβÀ´ÈóÌÐò×Ô¶¯ÔËÐС£±ÈÈçÎÒÃÇÒªÔËÐÐmysqlÔÚºǫ́£º
¡¡¡¡/usr/local/mysql/bin/mysqld_safe –user=mysql &
¡¡¡¡µ«ÊÇÎÒÃǺܶà³ÌÐò²¢²»ÏómysqldÒ»Ñù¿ÉÒÔ×ö³ÉÊØ»¤½ø³Ì£¬¿ÉÄÜÎÒÃǵijÌÐòÖ»ÊÇÆÕͨ³ÌÐò¶øÒÑ£¬Ò»°ãÕâÖÖ³ÌÐò¼´Ê¹Ê¹Óà & ½á⣬Èç¹ ......
ÔÀ´likelyºÍunlikelyÊÇÓÃÀ´±àÒëÓÅ»¯µÄ£¬Æäʵ¶¼¿ÉÒÔûÓС£ÎÒÃÇÖªµÀºÜ¶àcpuÀïÃæÓиæËß»º´æ£¬ÇÒÓÐÔ¤¶Á»úÖÆ£¬likelyºÍunlikely¾ÍÊÇÔö¼ÓÖ´ÐÐÅжÏÓï¾äʱµÄÃüÖÐÂÊ¡£
Èç¹ûÊÇif(lilely(a))£¬ËµÃ÷aÌõ¼þ·¢ÉúµÄ¿ÉÄÜÐÔ´ó£¬ÄÇôaÎªÕæµÄÓï¾äÔÚ±àÒë³É¶þ½øÖƵÄʱºò¾ÍÓ¦¸Ã½ô¸úÔÚÇ°Ãæ³ÌÐòµÄºóÃæ£¬ÕâÑù¾Í»á±»cacheÔ¤¶ÁÈ¡½øÈ¥£¬Ôö¼Ó³ÌÐòÖ´ÐÐ ......
ѧϰLinuxÖÕ¶ËÃüÁî
linuxĿ¼¼Ü¹¹
/ ¸ùĿ¼
/bin ³£ÓõÄÃüÁî binary file µÄÄ¿錄
/boot ´æ·ÅϵͳÆô¶¯Ê±±ØÐë¶ÁÈ¡µÄµµ°¸£¬°üÀ¨ºËÐÄ (kernel) ÔÚÄÚ
/boot/grub/menu.lst GRUBÉèÖÃ
/boot/vmlinuz & ......