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# cp test2 test
cp: cannot create regular file `test': Text file busy
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£¨1£©ÏÈrmɾ³ýÕýÔÚÔËÐеÄtest£¬È»ºócp test2 test¾ÍûÓдíÎóÁË¡£
£¨2£©ÏÈmv¸ÄÃûÕýÔÚÔËÐеÄtest£¬È»ºócp test2 testҲûÓÐÎÊÌâ¡£
²éÁ˲é×ÊÁϲ¢¶¯ÊÖ·ÖÎöÁËһϣ¬ÕÒµ½Á˱ȽÏÂúÒâµÄ½âÊÍ¡£cp²¢²»¸Ä±äÄ¿±êÎļþµÄinode£¬ÊÂʵÉÏËüµÄʵÏÖÊÇÕâÑùµÄ£º
# strace cp test2 test  2>&1 | grep open.*test
open("test2", O_RDONLY|O_LARGEFILE)     = 3
open("test", O_WRONLY|O_TRUNC|O_LARGEFILE) = 4
ÎÒÔ­ÒÔΪcpµÄʵÏÖÊÇ“rm + open(O_CREAT)”£¬²»¹ýÏÖÔÚÏëÏëÉÏÃæµÄʵÏÖ·½Ê½²ÅÊÇ×î¿É¿¿µÄ£¨±£Ö¤ÁËʱÐò°²È«ºÍÄ¿±êÎļþµÄÊôÐÔ£©¡£ÕâÒ²¿ÉÒÔ½âÊÍΪʲôcpµÄÄ¿±êÎļþ»á¼Ì³Ð±»¸²¸ÇÎļþµÄÊôÐÔ¶ø·ÇÔ´Îļþ¡£
LinuxÓÉÓÚDemand Paging»úÖÆµÄ¹ØÏµ£¬±ØÐëÈ·±£ÕýÔÚÔËÐÐÖеijÌÐò¾µÏñ£¨×¢Ò⣬²¢·ÇÎļþ±¾Éí£©²»±»ÒâÍâÐ޸ģ¬Òò´ËÄÚºËÔÚÆô¶¯³ÌÐòºó»áËø¶¨Õâ¸ö³ÌÐò¾µÏñµÄinode¡£Õâ¾Í ÊÇΪʲôcpÔÚÓÓO_WRONLY|O_TRUNC”ģʽopenÄ¿±êÎļþʱ»áʧ°Ü¡£¶øÏÈrmÔÙcpµÄ»°£¬ÐÂÎļþµÄinodeÆäʵÒѾ­¸Ä±äÁË£¬Ô­ inode²¢Ã»Óб»ÕæÕýɾ³ý£¬Ö±µ½ÄÚºËÊͷŶÔËüµÄÒýÓá£Í¬Àí£¬mvÖ»ÊǸıäÁËÎļþÃû£¬Æäinode²»±ä£¬ÐÂÎļþʹÓÃÁËеÄinode¡£
ÎÊÌâµ½ÕâÀïÒѾ­Ë®Âäʯ³ö£¬²»¹ýÅÙ¸ù¾¿µ×µÄ¸öÐÔÇýʹÎÒÔÙ×öÁËÒÔÏÂÒ»×éʵÑ飬ûÏëµ½½á¹ûÍêÈ«³öºõÎÒÒâÁÏÖ®Í⣡
дÁËÒ»¸ö¼òµ¥µÄ²âÊÔ³ÌÐò£º
#include <stdio.h>
int main(int argc, char * argv[])
{
foo();  // An export function by libtest.so.
sleep(1000);
return 0;
}
foo()ÊÇÁíÒ»¸ö²âÊÔ¶¯Ì¬¿âlibtest.soµÄµ¼³ö½Ó¿Ú£¬Ö»´òÓ¡Ò»ÐÐÌáʾ¾Í·µ»Ø¡£½ÓÏÂÀ´ÎÒ°ÑÉÏÃæ¶ÔÖ´ÐÐÎļþµÄ²âÊÔÓÃÀý¶Ô¶¯Ì¬¿âÓÖ×öÁËÒ»±é£º
£¨1£©cp libtest2.so libtest.so¿ÉÒÔÖ±½Ó¸²¸ÇÒѼÓÔØµÄ¶¯Ì¬¿â¡£
£¨2£©ÏÈrmɾ³ýÒѼÓÔØµÄlibtest.so£¬È»ºócp libtest2.so libtest.so³É¹¦¡£
£¨3£©ÏÈmv¸ÄÃûÒѼÓÔØµÄlibtest.so£¬È»ºócp libtest2.so libtest.so³É¹¦¡£
³ýÁ˵ÚÒ»¸öÓÃÀýÍ⣬½á¹ûÏàͬ¡£ÕâÑù¿´À´£¬¶¯Ì¬¿â±»¼ÓÔØÊ±ÄѵÀld²¢Ã»ÓÐËø¶¨inode£¿²»¹ýÏëÏëÒ²¿ÉÒÔ¿íË¡£¬±Ï¾¹ldÒ²ÊÇÓû§Ì¬³


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iptables - [RI] chain rule num rule-specification[option]
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iptables -D chain rule num[option]
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iptables -[LFZ] [chain][option]
ÓÃiptables -LFZ Á´Ãû [Ñ¡Ïî]
iptables -[NX] chain
ÓÃ -NX ......

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    cvpnlib.cpp cv ......

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1. cd /root/homework/module
2. vi process.c
3. ¼ÓÈëÈçÏ´úÂ룺
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
static int process_init(void)
{
int num= ......

[Linux] ¼òµ¥´î½¨Ð£Ô°FTP LINUXƪ


http://www.myzqu.com/viewthread.php?tid=56258&extra=page%3D1%26amp;filter%3Dtype%26amp;typeid%3D199
linux, FTP, ´î½¨·½·¨, ·þÎñÆ÷
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linux¹ÒÔØÔ­ÓÐLVMÅÌ

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    1¡¢pvs
¡¡¡¡[root@localhost yuanbor]# /sbin/pvs ¼ì²éÊÇ·ñÓÐÖØÃûµÄVG×é
¡¡¡¡2¡¢vgrename
¡¡¡¡[root@localhost yuanbor]#/sbin/vgrename [VG UUID] /dev/VolGroup01  #½«Öظ´µÄVG×é  ¸ù¾ÝUUID¸ÄΪ VolGroup01
¡¡¡¡[root@localhost yuanbor]# /sbin/pvs  #¼ì²é Ð޸Ľá¹û
¡¡¡ ......
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