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1.1 coreÎļþµÄ¼òµ¥½éÉÜ
ÔÚÒ»¸ö³ÌÐò±ÀÀ£Ê±£¬ËüÒ»°ã»áÔÚÖ¸¶¨Ä¿Â¼ÏÂÉú³ÉÒ»¸öcoreÎļþ¡£coreÎļþ½ö½öÊÇÒ»¸öÄÚ´æÓ³Ïó(ͬʱ¼ÓÉϵ÷ÊÔÐÅÏ¢)£¬Ö÷ÒªÊÇÓÃÀ´µ÷ÊԵġ£
1.2 ¿ªÆô»ò¹Ø±ÕcoreÎļþµÄÉú³É
ÓÃÒÔÏÂÃüÁîÀ´×èֹϵͳÉú³ÉcoreÎļþ:
ulimit -c 0
Ò²¿ÉÒÔÐÞ¸ÄϵͳÎļþÀ´µ÷ÕûcoreÑ¡Ïî
ÔÚ/etc/profileͨ³£»áÓÐÕâÑùÒ»¾ä»°À´½ûÖ¹²úÉúcoreÎļþ£¬Í¨³£ÕâÖÖÉèÖÃÊǺÏÀíµÄ:
# No core files by default
ulimit -S -c 0 > /dev/null 2>&1
ÏÂÃæµÄÃüÁî¿ÉÒÔ¼ì²éÉú³ÉcoreÎļþµÄÑ¡ÏîÊÇ·ñ´ò¿ª:
ulimit -c
Èç¹ûÏÔʾ0£¬ÔòΪ¹Ø±Õ
ulimit -c unlimitedÀ´ÈÃÌض¨µÄÓû§¿ÉÒÔ²úÉúcoreÎļþ£¬¶øulimit -c 1024ÔòÏÞÖƲúÉúµÄcoreÎļþµÄ´óС²»Äܳ¬¹ý1024 blcoks
ÔÚÓû§µÄ~/.bash_profileÀï¼ÓÉÏulimit -c unlimitedÀ´ÈÃÌض¨µÄÓû§¿ÉÒÔ²úÉúcoreÎļþ
1.3 ÉèÖÃCore DumpµÄºËÐÄת´¢ÎļþĿ¼ºÍÃüÃû¹æÔò
/proc/sys/kernel/core_uses_pid¿ÉÒÔ¿ØÖƲúÉúµÄcoreÎļþµÄÎļþÃûÖÐÊÇ·ñÌí¼Ópid×÷ΪÀ©Õ¹£¬Èç¹ûÌí¼ÓÔòÎļþÄÚÈÝΪ1£¬·ñÔòΪ0
/proc/sys/kernel/core_pattern¿ÉÒÔÉèÖøñʽ»¯µÄcoreÎļþ±£´æλÖûòÎļþÃû£¬±ÈÈçÔ­À´ÎļþÄÚÈÝÊÇcore-%e
¿ÉÒÔÕâÑùÐÞ¸Ä:
echo "/corefile/core-%e-%p-%t" > /proc/sys/kernel/core_pattern
½«»á¿ØÖÆËù²úÉúµÄcoreÎļþ»á´æ·Åµ½/corefileĿ¼Ï£¬²úÉúµÄÎļþÃûΪcore-ÃüÁîÃû-pid-ʱ¼ä´Á
ÒÔÏÂÊDzÎÊýÁбí:
    %p - insert pid into filename Ìí¼Ópid
    %u - insert current uid into filename Ìí¼Óµ±Ç°uid
    %g - insert current gid into filename Ìí¼Óµ±Ç°gid
    %s - insert signal that caused the coredump into the filename Ìí¼Óµ¼Ö²úÉúcoreµÄÐźÅ
    %t - insert UNIX time that the coredump occurred into filename Ìí¼ÓcoreÎļþÉú³ÉʱµÄunixʱ¼ä
    %h - insert hostname where the coredump happened into filename Ìí¼ÓÖ÷»úÃû
    %e - insert coredumping executable name into filename Ìí¼ÓÃüÁîÃû
1.4 ʹÓÃcoreÎļþ
ÔÚcoreÎļþËùÔÚĿ¼Ï¼üÈë:
gdb -c core
Ëü»áÆô¶¯GNUµÄµ÷ÊÔÆ÷£¬À´µ÷ÊÔcoreÎļþ£¬²¢ÇÒ»áÏÔʾÉú³É´ËcoreÎļþµÄ³ÌÐòÃû£¬ÖÐÖ¹´Ë³ÌÐòµÄÐźŵȵÈ
ÈôÐèÒª½øÒ»²½²é¿´core dumpÎļþ½øÐÐÅÅ´í£¬ÐèÒª½øÒ»²½Á˽âgdbµÄÓ÷¨¡£


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Signaling CommandÊÇ2¸öBluetoothʵÌåÖ®¼äµÄL2CAP²ãÃüÁî´«Êä¡£ËùÒÔµÃSignaling CommandʹÓÃCID 0x0001.
¶à¸öCommand¿ÉÒÔÔÚÒ»¸öC-frame£¨control frame£©Öз¢ËÍ¡£
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1. ALT + '.'
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µÚ¶þÌõÃüÁcd /usr/local;
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2.CTRL+'r'
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3.TAB
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Linux 2.6 ×Ö·ûÉ豸Çý¶¯³ÌÐò


Linux 2.6 ×Ö·ûÉ豸Çý¶¯³ÌÐò
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Linux ½Å±¾±àд»ù´¡(¶þ)

1.1.5 ShellÃüÁîºÍÁ÷³Ì¿ØÖÆ
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1)Unix ÃüÁî:
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³£ÓÃÃüÁîÓï·¨¼°¹¦ÄÜ
echo "some text": ½«ÎÄ×ÖÄÚÈÝ´òÓ¡ÔÚÆÁÄ»ÉÏ
ls: ÎļþÁбí
wc –l filewc -w filewc -c fi ......
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