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netstat -atn
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netstat -atn | cut -b 49-75 | grep -o -P "\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b" | sort | uniq -c | sort -n -r -k 1,7 | head -10
ÕâÐÐÃüÁîÓÃÀ´·ÖÎönetstatµÄÊä³ö½á¹û£¬×îºóµÃ³öµÄÊÇĿǰ´¦ÓÚÁ¬½ÓÖеIJ»Í¬µÄIPµØÖ·£»Õâ¸öÃüÁîÔÚUbuntu£¨cut -b 45-75)Éϲ»ÄÜʵÏÖ£¬ÕâÊDz»Í¬µÄLinux¶ÔÓÚһЩ»ù±¾ÃüÁîµÄʵÏÖ²»Í¬£¨±àÒëµÄÑ¡ÏîºÍ²ÎÊý²»Ò»Ö£©£¬µ«ÊÇubuntuÉÏ¿ÉÒÔÓÃÏÂÃæµÄÃüÁîʵÏÖÏàËÆµÄ¹¦ÄÜ£¬
netstat -atn | cut -b 45-75 | cut -d':' -f1 |sort | uniq -c | sort -n -r -k 1,7 | head -10
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netstat -atn |cut -b 77-90 £ü sort | uniq -c ÊÇÁгöÿ¸öÁ¬½ÓµÄ״̬²¢Í³¼Æ£¡
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time tcpdump -ns 200 -c 100 '(dst port http or dst port https) and tcp[13] & 2!=0' | grep -o -P '\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}.\d{1,5}\s\>' | cut -d '.' -f 1-4 | sort | uniq -c | sort -n -r -k 1,7 | head -25
Õâ¸öÃüÁîÊǶÔÓÚ100¸ö°üÖÐÓжàÉÙ¸öÐÂÁ¬½ÓÇëÇóµÄͳ¼Æ£¡ÔËÓÃÁËtcpdumpץȡ100¸ö£¨£­c 100£©°ü£¬×îºóÁгöÕâЩÇëÇóµÄIPµØÖ·¡£
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[root@localhost conf]# ps -ef|grep httpd|wc -l
½á¹û - 1 (ÒòΪ°üº¬ÁËgrep httpdÕâ¸ö½ø³Ì)
 
 
[root@localhost conf]# netstat -n|awk '/^tcp/{++S[$NF]} END {for(a in S) print a,S[a]}'
LAST_ACK 173
SYN_RECV 35
CLOSE_WAIT 159
ESTABLISHED 152
FIN_WAIT1 29
FIN_WAIT2 10
CLOSING 39
TIME_WAIT 103


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Signaling CommandÊÇ2¸öBluetoothʵÌåÖ®¼äµÄL2CAP²ãÃüÁî´«Êä¡£ËùÒÔµÃSignaling CommandʹÓÃCID 0x0001.
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 Èç¹ûÒªÖ±½Ó·¢ËÍSignaling Command.ÐèÒª½¨Á¢SOCK_RAWÀàÐ͵ÄL2CAPÁ¬½ÓSocket¡£ÕâÑù²ÅÓлú»á×Ô¼ºÌî³äCommand Code£¬Identi ......

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$ kill -l
1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL
5) SIGTRAP 6) SIGABRT 7) SIGBUS 8) SIGFPE
9) SIGKILL 10) SIGUSR1 11) SIGSEGV 12) SIGUSR2
13) SIGPIPE 14) SIGALRM 15) SIGTERM 17) SIGCHLD
18 ......

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sudo vi /etc/inetd.conf²¢¼ÓÈëÒÔÏÂÒ»ÐÐ
telnet stream tcp nowait telnetd /usr/sbin/tcpd /usr/sbin/in.tel ......

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