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ÎÒÃÇÔÚLinuxÏ°²×°ÏµÍ³Èí¼þµÄʱºò,¾­³£Óöµ½Ò»Ð©ÏµÍ³»·¾³±äÁ¿ÅäÖõÄÎÊÌ⡣ʲôÊÇ»·¾³±äÁ¿£¿ÈçºÎ¶¨ÖÆ»·¾³±äÁ¿£¿ÎÒ½«ÔÚÏÂÃæ×öһЩ½éÉÜ¡£
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LinuxÊÇÒ»¸ö¶àÓû§µÄ²Ù×÷ϵͳ¡£¶àÓû§Òâζ×Åÿ¸öÓû§µÇ¼ϵͳºó£¬¶¼ÓÐ×Ô¼º×¨ÓõÄÔËÐл·¾³¡£¶øÕâ¸ö»·¾³ÊÇÓÉÒ»×é±äÁ¿Ëù¶¨Òå,Õâ×é±äÁ¿±»³ÆΪ»·¾³±äÁ¿¡£Óû§¿ÉÒÔ¶Ô×Ô¼ºµÄ»·¾³±äÁ¿½øÐÐÐÞ¸ÄÒÔ´ïµ½¶Ô»·¾³µÄÒªÇó¡£
¶þ¡¢¶¨ÖÆ»·¾³±äÁ¿
»·¾³±äÁ¿ÊǺÍShell½ôÃÜÏà¹ØµÄ£¬ËüÊÇͨ¹ýShellÃüÁîÀ´ÉèÖõġ£»·¾³±äÁ¿ÓÖ¿ÉÒÔ±»ËùÓе±Ç°Óû§ËùÔËÐеijÌÐòËùʹÓ᣶ÔÓÚbashÀ´Ëµ£¬¿ÉÒÔͨ¹ý±äÁ¿ÃûÀ´·ÃÎÊÏàÓ¦µÄ»·¾³±äÁ¿¡£
ÏÂÃæͨ¹ý¼¸¸öʵÀýÀ´ËµÃ÷
1.ÏÔʾ»·¾³±äÁ¿HOME
$ echo $HOME
/home/admin
2.ÉèÖÃÒ»¸öеĻ·¾³±äÁ¿NAME
$ export NAME=”RaidCheng”
$ echo $NAME
RaidCheng
3.ʹÓÃenvÃüÁîÏÔʾËùÓеĻ·¾³±äÁ¿
$ env
HOSTNAME=test
TERM=vt100
SHELL=/bin/bash
HISTSIZE=1000
SSH_CLIENT=202.xxx.xxx.xxx 53694 22
CATALINA_BASE=/usr/local/jakarta-tomcat
SSH_TTY=/dev/pts/0
ANT_HOME=/usr/local/ant
JAVA_OPTS=-server
USER=admin

4.ʹÓÃsetÃüÁîÏÔʾËùÓб¾µØ¶¨ÒåµÄShell±äÁ¿
$ set
BASH=/bin/bash
BASH_VERSINFO=([0]=”2″ [1]=”05b” [2]=”0″ [3]=”1″ [4]=”release” [5]=”i386-redhat-linux-gnu”)
BASH_VERSION=’2.05b.0(1)-release’
CATALINA_BASE=/usr/local/jakarta-tomcat
CATALINA_HOME=/usr/local/jakarta-tomcat

5.ʹÓÃunsetÃüÁîÀ´Çå³ý»·¾³±äÁ¿
$ export NAME=”RaidCheng”
$ echo $NAME
RaidCheng
$ unset NAME
$ echo $NAME
6.ʹÓÃreadonlyÃüÁîÉèÖÃÖ»¶Á±äÁ¿
$ export NAME=”RaidCheng”
$ readonly NAME
$ unset NAME
-bash: unset: NAME: cannot unset: readonly variable
$ NAME=”New” #»á·¢ÏÖ´ËÒ²±äÁ¿²»Äܱ»ÐÞ¸Ä
-bash: TEST: readonly variable
Èý¡¢³£¼ûµÄ»·¾³±äÁ¿
PATH¡¡¡¡¡¡¡¡¡¡¡¡¾ö¶¨ÁËshell½«µ½ÄÄЩĿ¼ÖÐÑ°ÕÒÃüÁî»ò³ÌÐò
HOME¡¡¡¡¡¡¡¡¡¡¡¡µ±Ç°Óû§Ö÷Ŀ¼
HISTSIZE¡¡¡¡¡¡¡¡ÀúÊ·¼Ç¼Êý
LOGNAME ¡¡¡¡¡¡¡¡µ±Ç°Óû§µÄµÇ¼Ãû
HOSTNAME¡¡¡¡¡¡¡¡Ö¸Ö÷»úµÄÃû³Æ
SHELL ¡¡¡¡¡¡¡¡¡¡Ç°Óû§ShellÀàÐÍ
LANGUGE ¡¡¡¡¡¡¡¡ÓïÑÔÏà¹ØµÄ»·¾³±äÁ¿£¬¶àÓïÑÔ¿ÉÒÔÐ޸Ĵ˻·¾³±äÁ¿
MAIL¡¡¡¡¡¡¡¡¡¡¡¡µ±Ç°Óû§µÄÓʼþ´


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ʵսLinux Bluetooth±à³Ì(Áù) L2CAP±à³ÌʵÀý

ÀýÒ»£º·¢ËÍSignaling Packet£º
Signaling CommandÊÇ2¸öBluetoothʵÌåÖ®¼äµÄL2CAP²ãÃüÁî´«Êä¡£ËùÒÔµÃSignaling CommandʹÓÃCID 0x0001.
¶à¸öCommand¿ÉÒÔÔÚÒ»¸öC-frame£¨control frame£©Öз¢ËÍ¡£
 Èç¹ûÒªÖ±½Ó·¢ËÍSignaling Command.ÐèÒª½¨Á¢SOCK_RAWÀàÐ͵ÄL2CAPÁ¬½ÓSocket¡£ÕâÑù²ÅÓлú»á×Ô¼ºÌî³äCommand Code£¬Identi ......

LinuxÏÂSVN°²×°ÅäÖÃÈ«³Ìʵ¼


Ò»¡¢°²×°SVNĬÈÏ°²×°µ½/usr/local/binÏÂÃæ
¶þ¡¢´´½¨²Ö¿â svnadmin create /home/svnrepo
/root/svnrepoΪËù´´½¨²Ö¿âµÄ·¾¶£¬ÀíÂÛÉÏ¿ÉÒÔÊÇÈκÎĿ¼
Èý¡¢ÐÞ¸ÄÅäÖÃÎļþ/home/svnrepo/conf/svnserve.conf
#È¥µô#[general]Ç°ÃæµÄ#ºÅ
[general]
#ÄäÃû·ÃÎʵÄȨÏÞ£¬¿ÉÒÔÊÇread,write,none,ĬÈÏΪread
anon-access = none
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linuxÖÐÓÃshell»ñÈ¡×òÌì¡¢Ã÷Ìì»ò¶àÌìÇ°µÄÈÕÆÚ

linuxÖÐÓÃshell»ñÈ¡×òÌì¡¢Ã÷Ìì»ò¶àÌìÇ°µÄÈÕÆÚ:
ÔÚLinuxÖжÔman date -d ²ÎÊý˵µÄ±È½ÏÄ£ºý,ÒÔϾÙÀý½øÒ»²½ËµÃ÷:
# -d, --date=STRING display time described by STRING, not `now’
[root@Gman root]# date -d next-day +%Y%m%d #Ã÷ÌìÈÕÆÚ
20091024
[root@Gman root]# date -d last-day +%Y%m%d #×òÌìÈÕÆÚ
20091 ......

ʹÓÃlinux¹²ÏíÄÚ´æµÄʵÏÖµÄphpÄÚ´æ¶ÓÁÐ

<?php
/**
* ʹÓù²ÏíÄÚ´æµÄPHPÑ­»·ÄÚ´æ¶ÓÁÐʵÏÖ
* Ö§³Ö¶à½ø³Ì, Ö§³Ö¸÷ÖÖÊý¾ÝÀàÐ͵Ĵ洢
* ×¢: Íê³ÉÈë¶Ó»ò³ö¶Ó²Ù×÷,¾¡¿ìʹÓÃunset(), ÒÔÊÍ·ÅÁÙ½çÇø
*
* @author wangbinandi@gmail.com
* @created 2009-12-23
*/
class SHMQueue
{
private $maxQSize = 0; // ¶ÓÁÐ×î´ó³¤¶È

private $front = 0; ......

php + mysq + linux УÈËÊ´¦ÍøÕ¾

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