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top - 01:06:48 up  1:22,  1 user,  load average: 0.06, 0.60, 0.48
Tasks:  29 total,   1 running,  28 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.3% us,  1.0% sy,  0.0% ni, 98.7% id,  0.0% wa,  0.0% hi,  0.0% si
Mem:    191272k total,   173656k used,    17616k free,    22052k buffers
Swap:   192772k total,        0k used,   192772k free,   123988k cached
   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  1379 root      16   0  7976 2456 1980 S  0.7  1.3   0:11.03 sshd
14704 root      16   0  2128  980  796 R  0.7  0.5   0:02.72 top
     1 root      16   0  1992  632  544 S  0.0  0.3   0:00.90 init
     2 root      34  19     0    0    0 S  0.0  0.0   0:00.00 ksoftirqd/0
     3 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 watchdog/0
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01:06:48µ±Ç°Ê±¼ä
up 1:22ϵͳÔËÐÐʱ¼ä£¬¸ñʽΪʱ:·Ö
1 userµ±Ç°µÇ¼Óû§Êý
load average: 0.06, 0.60, 0.48ϵͳ¸ºÔØ£¬¼´ÈÎÎñ¶ÓÁеÄƽ¾ù³¤¶È¡£
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ʵսLinux Bluetooth±à³Ì£¨Èý£© HCI²ã±à³Ì

1. HCI²ãЭÒé¸ÅÊö£º
HCIÌṩһÌ×ͳһµÄ·½·¨À´·ÃÎÊBluetoothµ×²ã¡£ÈçͼËùʾ£º
´ÓͼÉÏ¿ÉÒÔ¿´³ö£¬Host Controller Interface(HCI)  ¾ÍÊÇÓÃÀ´¹µÍ¨HostºÍModule¡£Hostͨ³£¾ÍÊÇPC£¬ ModuleÔòÊÇÒÔ¸÷ÖÖÎïÀíÁ¬½ÓÐÎʽ£¨USB,serial,pc-cardµÈ£©Á¬½Óµ½PCÉϵÄbluetooth Dongle¡£
ÔÚHostÕâÒ»¶Ë£ºapplication,SDP,L2capµÈЭÒé ......

ʵսLinux Bluetooth±à³Ì£¨ËÄ£© L2CAP²ã±à³Ì

£¨L2CAPЭÒé¼ò½é£¬L2CAPÔÚBlueZÖеÄʵÏÖÒÔ¼°L2CAP±à³Ì½Ó¿Ú£©
Ò»£ºL2CAPЭÒé¼ò½é£º
Logical Link Control and Adaptation Protocol(L2CAP)
Âß¼­Á¬½Ó¿ØÖƺÍÊÊÅäЭÒé (L2CAP) ΪÉϲãЭÒéÌṩÃæÏòÁ¬½ÓºÍÎÞÁ¬½ÓµÄÊý¾Ý·þÎñ£¬²¢Ìṩ¶àЭÒ鹦ÄܺͷָîÖØ×é²Ù×÷¡£L2CAP ³äÐíÉϲãЭÒéºÍÓ¦ÓÃÈí¼þ´«ÊäºÍ½ÓÊÕ×î´ó³¤¶ÈΪ 64K µÄ L2CAP Ê ......

[תÌû]LinuxÇý¶¯¿ª·¢Ñ§Ï°µÄһЩ±ØÒª²½Öè

 1. ѧ»áд¼òµ¥µÄmakefile
2. ±àһЩӦÓÃ
³ÌÐò
£¬¿ÉÒÔÓÃmakefileÅÜÆðÀ´
3. ѧ»áдÇý¶¯
µÄmakefile
4. дһ¼òµ¥charÇý¶¯£¬makefile±àÒëͨ¹ý£¬¿ÉÒÔinsmod£¬ lsmod£¬ rmmod. ÔÚÇý¶¯µÄinitº¯ÊýÀï´òÓ¡hello world£¬insmodºóÓ¦¸ÃÄܹ»Í¨¹ýdmesg¿´µ½Êä³ö
¡£
5. дһÍêÕûÇý¶¯£¬ ¼ÓÉÏread£¬ write£¬ ioctl£¬ pollingµÈ¸ ......

Apache LinuxÉÏRPM°üжÔØ ±¸Íü

[root@apache02 home]# rpm -q -a|grep http
httpd-2.0.52-25.ent
httpd-manual-2.0.52-25.ent
system-config-httpd-1.3.1-1
httpd-devel-2.0.52-25.ent
httpd-suexec-2.0.52-25.ent
#rpm -e httpd-2.0.52-25.ent
error: Failed dependencies:
        httpd-mmn = 20020903 is ......

linux fork() º¯ÊýʵÀýÏê½â

forkº¯Êýѧϰ£º
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
main ()
{
  pid_t pid; pid=fork();
  if (pid < 0)
    printf("error in fork!");
  else if (pid == 0)
    printf("i ......
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