Linux GRUB ·½Ê½Çл»Æô¶¯¼¶±ð(runlevel)
ÊÂÒòÐÞ¸ÄÁËij¸öÅäÖÃÎļþ£¬µ¼ÖÂϵͳÆô¶¯Ä³¸ö·þÎñµÄʱºòholdסÁË£¬ÏµÍ³Æô¶¯²»ÆðÀ´¡£ÕâÖÖÇé¿öϳ£³£Í¨¹ýÐ޸ıíÆô¶¯¼¶±ð£¬Çл»µ½·ÇxwindowģʽÏÂÖØÐÂÆô¶¯£¬Ò»°ãѡȡÆô¶¯¼¶±ðrunlevelΪ3¼´¿É¡£
²Î¿¼»·¾³£ºRedhat Enterprise Linux AS 4
²½Ö裺
1.µ±LinuxÆô¶¯Ê±£¬°´ e ½øÈ¥²ÎÊýÑ¡Ôñ±à¼½çÃæ£º
2.ÒÆ¶¯¹â±êÑ¡ÖÐϵͳ£¨Red Hat Enterprise Linux AS (2.6.9-55.ELsmp)£©£¬°´ e£º
3.ÒÆ¶¯¹â±êÑ¡ÖУ¨kernel /vmlinuxz-2.6.9-55.ELsmp ro root=LABEL=/ rhgb quiet£©£º
4.ÐÞ¸ÄrhgbΪ3£¬È»ºó°´enter¼ü£º
5.Ñ¡ÖУ¨kernel /vmlinuxz-2.6.9-55.ELsmp ro root=LABEL=/ 3 quiet£©£¬°´ b£¬ ϵͳÔò½øÈ¥Æô¶¯³ÌÐò¡£
×¢£¬µ±ÏµÍ³rebootʱ£¬»á×Ô¶¯Çл»µ½xwindowsÆô¶¯·½Ê½µÄrunlevel£¨5£©£»
Áí£¬Èç¹ûÄܽøÈ¥ÏµÍ³£¬ »òÕßÄÜÆô¶¯sshd·þÎñ£¬Ôòͨ¹ýÐÞ¸Ä/etc/inittab Îļþ¸ü¸Ärunlevel¡£
Òź¶µÄÊÇÔÝʱÎÞ·¨ÉÏ´«Í¼Æ¬£¬¸÷¸ö²½ÖèµÄ½ØÍ¼Ö»ÄܸéÏÂÁË¡«¡«
²Î¿¼£º
Runlevel System State
0 Halt the system
1 Single user mode
2 Basic multi user mode
3 Multi user mode
5 Multi user mode with GUI
6 Reboot the system
S, s Single user mode
Ïà¹ØÎĵµ£º
£¨L2CAPÐÒé¼ò½é£¬L2CAPÔÚBlueZÖеÄʵÏÖÒÔ¼°L2CAP±à³Ì½Ó¿Ú£©
Ò»£ºL2CAPÐÒé¼ò½é£º
Logical Link Control and Adaptation Protocol(L2CAP)
Âß¼Á¬½Ó¿ØÖƺÍÊÊÅäÐÒé (L2CAP) ΪÉϲãÐÒéÌá¹©ÃæÏòÁ¬½ÓºÍÎÞÁ¬½ÓµÄÊý¾Ý·þÎñ£¬²¢Ìṩ¶àÐÒ鹦ÄܺͷָîÖØ×é²Ù×÷¡£L2CAP ³äÐíÉϲãÐÒéºÍÓ¦ÓÃÈí¼þ´«ÊäºÍ½ÓÊÕ×î´ó³¤¶ÈΪ 64K µÄ L2CAP Ê ......
±¾ÎľÍÓû§ÔÚ×°linuxµÄ¹ý³ÌÖУ¬ËùÓöµ½µÄlinux·ÖÇøÎÊÌâÀ´ÏêϸµØ½éÉÜһϣ¬ÕâÀïÒÔred hat linux7.1ΪÀý¡£
Ê×ÏÈÎÒÃÇÒª¶ÔÓ²ÅÌ·ÖÇøµÄ»ù±¾¸ÅÄî½øÐÐһЩ³õ²½µÄÁ˽⣬ӲÅ̵ķÖÇøÖ÷Òª·ÖΪ»ù±¾·ÖÇø£¨primary partion£©ºÍÀ©³ä·ÖÇø(extension partion)Á½ÖÖ£¬»ù±¾·ÖÇøºÍÀ©³ä·ÖÇøµÄÊýĿ֮ºÍ²»ÄÜ´óÓÚËĸö¡£ÇÒ»ù±¾·ÖÇø¿ÉÒÔÂíÉϱ»Ê¹Óõ«² ......
#include <stdio.h>
#include <unistd.h>
int main() {
char link[100], path[100];
sprintf(link, "/proc/%d/exe", getpid());
readlink(link, path, sizeof(path));
printf("%s\n.", path);
return 0;
} ......
°²×°Sqlite
Ê×ÏÈÊÇÏÂÔØsqlite-3.3.8.tar.gz¡£
1¡¢½âѹsqlite-3.3.8.tar.gz£ºtar –xzvf sqlite-3.3.8.tar.gz,µÃµ½sqlite-3.3.8µÄÎļþ¡£
2¡¢ÔÚsqlite-3.3.8ͬһĿ¼Ï´´½¨sqliteÎļþ£ºmkdir sqlite
3¡¢Cd sqlite
4¡¢Ö´ÐÐconfigureÉú³É°²×°³ÌÐò
5¡¢ ../sqlite-3.3.8/configure --prefix=/home/work/zd ......
¹ØÓÚepollʹÓ÷½·¨£º
²ÎÕÕ£º http://linux.die.net/man/4/epoll
ʵÀý´úÂ룺£¨À´×ÔÍøÉÏijÂÛ̳£©
#include <pthread.h>
#include <stdio.h>
#include <sys/timeb.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/epoll.h> ......