LinuxϵĶδíÎó²úÉúµÄÔÒò¼°µ÷ÊÔ·½·¨
LinuxϵĶδíÎó²úÉúµÄÔÒò¼°µ÷ÊÔ·½·¨
ĬÈÏ·ÖÀà 2008-08-26 13:37 ÔĶÁ28 ÆÀÂÛ0
×ֺţº ´ó´ó ÖÐÖРСС
¼ò¶øÑÔÖ®,²úÉú¶Î´íÎó¾ÍÊÇ·ÃÎÊÁË´íÎóµÄÄÚ´æ¶Î£¬Ò»°ãÊÇÄãûÓÐȨÏÞ£¬»òÕ߸ù±¾¾Í²»´æÔÚ¶ÔÓ¦µÄÎïÀíÄÚ´æ,ÓÈÆä³£¼ûµÄÊÇ·ÃÎÊ0µØÖ·.
Ò»°ãÀ´Ëµ,¶Î´íÎó¾ÍÊÇÖ¸·ÃÎʵÄÄڴ泬³öÁËϵͳËù¸øÕâ¸ö³ÌÐòµÄÄÚ´æ¿Õ¼ä£¬Í¨³£Õâ¸öÖµÊÇÓÉgdtrÀ´±£´æµÄ£¬ËûÊÇÒ»¸ö48λµÄ¼Ä´æÆ÷£¬ÆäÖеÄ32λÊDZ£´æÓÉËüÖ¸ÏòµÄgdt±í£¬ºó13λ±£´æÏàÓ¦ÓÚgdtµÄϱ꣬×îºó3λ°üÀ¨Á˳ÌÐòÊÇ·ñÔÚÄÚ´æÖÐÒÔ¼°³ÌÐòµÄÔÚcpuÖеÄÔËÐ춱ð,Ö¸ÏòµÄgdtÊÇÓÉÒÔ64λΪһ¸öµ¥Î»µÄ±í£¬ÔÚÕâÕűíÖоͱ£´æ×ųÌÐòÔËÐеĴúÂë¶ÎÒÔ¼°Êý¾Ý¶ÎµÄÆðʼµØÖ·ÒÔ¼°Óë´ËÏàÓ¦µÄ¶ÎÏÞºÍÒ³Ãæ½»»»»¹ÓгÌÐòÔËÐ춱ð»¹ÓÐÄÚ´æÁ£¶ÈµÈµÈµÄÐÅÏ¢¡£Ò»µ©Ò»¸ö³ÌÐò·¢ÉúÁËÔ½½ç·ÃÎÊ£¬cpu¾Í»á²úÉúÏàÓ¦µÄÒì³£±£»¤£¬ÓÚÊÇsegmentation fault¾Í³öÏÖÁË.
ÔÚ±à³ÌÖÐÒÔϼ¸Àà×ö·¨ÈÝÒ×µ¼Ö¶δíÎó,»ù±¾ÊÇÊÇ´íÎóµØʹÓÃÖ¸ÕëÒýÆðµÄ
1)·ÃÎÊϵͳÊý¾ÝÇø£¬ÓÈÆäÊÇÍù ϵͳ±£»¤µÄÄÚ´æµØַдÊý¾Ý
×î³£¼û¾ÍÊǸøÒ»¸öÖ¸ÕëÒÔ0µØÖ·
2)ÄÚ´æÔ½½ç(Êý×éÔ½½ç£¬±äÁ¿ÀàÐͲ»Ò»ÖµÈ) ·ÃÎʵ½²»ÊôÓÚÄãµÄÄÚ´æÇøÓò
½â¾ö·½·¨
ÎÒÃÇÔÚÓÃC/C++ÓïÑÔд³ÌÐòµÄʱºî£¬ÄÚ´æ¹ÜÀíµÄ¾ø´ó²¿·Ö¹¤×÷¶¼ÊÇÐèÒªÎÒÃÇÀ´×öµÄ¡£Êµ¼ÊÉÏ£¬ÄÚ´æ¹ÜÀíÊÇÒ»¸ö±È½Ï·±ËöµÄ¹¤×÷£¬ÎÞÂÛÄã¶à¸ßÃ÷£¬¾Ñé¶à·á¸»£¬ÄÑ Ãâ»áÔÚ´Ë´¦·¸Ð©Ð¡´íÎ󣬶øͨ³£ÕâЩ´íÎóÓÖÊÇÄÇôµÄdzÏÔ¶øÒ×ÓÚÏû³ý¡£µ«ÊÇÊÖ¹¤“³ý³æ”£¨debug£©£¬ÍùÍùÊÇЧÂʵÍÏÂÇÒÈÃÈËÑá·³µÄ£¬±¾ÎĽ«¾Í"¶Î´íÎó"Õâ¸ö ÄÚ´æ·ÃÎÊÔ½½çµÄ´íÎó̸̸ÈçºÎ¿ìËÙ¶¨Î»ÕâЩ"¶Î´íÎó"µÄÓï¾ä¡£
ÏÂÃ潫¾ÍÒÔϵÄÒ»¸ö´æÔڶδíÎóµÄ³ÌÐò½éÉܼ¸ÖÖµ÷ÊÔ·½·¨£º
1 dummy_function (void)
2 {
3 unsigned char *ptr = 0x00;
4 *ptr = 0x00;
5 }
6
7 int main (void)
8 {
9 dummy_function ();
10
11 &nb
Ïà¹ØÎĵµ£º
shutdown [options] when [message]
options:¡¡-r ±íʾÖØÆô£¬-h±íʾϵͳ·þÎñÍ£ÖÍ(halt)ºó£¬Á¢¿Ì¹Ø»ú £¬-f±íʾ¿ìËÙÖØÆô
when£º¡¡ÎªshutdownÖ¸¶¨Ê±¼ä¡£hh:mm£º¾ø¶Ôʱ¼ä£¬hhָСʱ£¬mmÖ¸·ÖÖÓ£»Èç08:30£¬+m:m·ÖÖÓºóÖ´ÐУ¬
now=+0£¬Ò²¾ÍÊÇÁ¢¿ÌÖ´ÐÐ
message£º±íʾϵͳµÄ¹ã²¥ÐÅÏ¢£¬Ò»°ãÌáʾ¸÷¸öÓû§ÏµÍ³¹Ø»ú» ......
[root@nonamelinux ~]# free
total used free shared buffers cached
Mem: 386024 377116 8908 0 21280 155468
-/+ buffers/cache: 200368 185656
Swap: 393552 0 393552
ÏÂÃæÊǶÔÕâЩÊýÖµµÄ½âÊÍ£º
µÚ¶þÐÐ(mem)£º
total:×ܼÆÎïÀíÄÚ´æµÄ´óС¡£
used:ÒÑʹÓöà´ó¡£
free:¿ÉÓÃÓжàÉÙ¡£
Shared:¶à¸ö½ø³Ì¹²ÏíµÄÄÚ ......
Ò»¡¢ ±³¾°
1£®Ê²Ã´ÊÇApache £¿
Apache£¬ÊÇÒ»ÖÖ¿ª·ÅÔ´ÂëµÄHTTP·þÎñÆ÷£¬¿ÉÒÔÔÚ´ó¶àÊý²Ù×÷ϵͳÖÐÔËÐУ¬ÓÉÓÚÆä¶àƽ̨ºÍ°²È«ÐÔËùÒÔ±»¹ã·ºÊ¹Óã¬ÊÇÄ¿Ç°×îÁ÷ÐеÄWeb·þÎñÆ÷Èí¼þÖ®Ò»¡£Apache Æð³õÓÉ Illinois ´óѧ Urbana-Champaign µÄ¹ú¼Ò¸ß¼¶¼ÆËã³ÌÐòÖÐÐÄ¿ª·¢£¬¿ªÊ¼ApacheÖ»ÊÇ×÷ΪNetscapeÍ ......
Ò» ¡¢LinuxÎļþ½á¹¹
¡¡¡¡Îļþ½á¹¹ÊÇÎļþ´æ·ÅÔÚ´ÅÅ̵ȴæÖüÉ豸ÉϵÄ×éÖ¯·½·¨¡£Ö÷ÒªÌåÏÖÔÚ¶ÔÎļþºÍĿ¼µÄ×éÖ¯ÉÏ¡£
¡¡¡¡Ä¿Â¼ÌṩÁ˹ÜÀíÎļþµÄÒ»¸ö·½±ã¶øÓÐЧµÄ;¾¶¡£
¡¡¡¡LinuxʹÓñê×¼µÄĿ¼½á¹¹£¬ÔÚ°²×°µÄʱºò£¬°²×°³ÌÐò¾ÍÒѾΪÓû§´´½¨ÁËÎļþϵͳºÍÍêÕû¶ø¹Ì¶¨µÄĿ¼×é³ÉÐÎʽ£¬²¢Ö¸¶¨ÁËÿ¸öĿ¼µÄ×÷ÓúÍÆäÖеÄÎļþ ......