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A lot of computer friends will encounter such a situation, the computer just bought the time to feel the speed of use, the computer is not a card, but with the use of the computer to find more and more cards, can not find the beginning of that smooth feeling. So what about the computer card? Why do computers get more and more cards? Around these 2 questions, this tutorial for you to do a brief introduction, for reference. First of all, whether we're buying a new computer or a system-mounted com

Ok–lvs is running (conn:9056 active, 22307 inactive) |active=9056;80000;99999;0; inactive=22307;80000;99999;0; 2.2 Confirm the above test can get the normal value, add the configuration file,Vim/usr/local/nagios/etc/objects/services.cfgDefine Service{Use Generic-serviceHOST_NAME Tw_lvsService_description check_connectionCheck_command Check_nrpe!check_conn} After saving, reload the Nagios,/etc/init.d/nagios Reload 2.3 Nagios Web page can be found to get the value.Check_connection OK 06-25-201

("Listen");Exit (1);}for (;;){if ((Connfd=accept (LISTENFD, (struct sockaddr*) null,null) = =-1){Perror ("accept");Exit (1);}if (fork () = = 0)/*child process*/{Close (LISTENFD); * * This sentence can not be less, the reason for everyone to think about it. */Ticks=time (NULL);snprintf (buff,100, "%.24s/r/n", CTime (ticks));Write (Connfd,buff,strlen (buff));Close (CONNFD);Sleep (1);EXECLP ("f1-9d", NULL);Perror ("EXECLP");Exit (1);}Close (CONNFD);Exit

least 9s is required to complete the first retry, and Connect-time is less than 9s). Therefore, the error 4 is reported. In a test set to connect-time=10s, the client initiates a connection for the first time, lasts 3s, does not succeed, retries for the first time, retries, does not succeed, arrives at connect-time time, and the client disconnects. Therefore, the error 110 is reported. In summary, assume that the value of/proc/sys/net/ipv4/tcp_syn_retries is n Then, when the TCP initiates the c

connection uses three-time handshake to establish a connectionAccept returns when the handshake is complete, and its return value is a new descriptor for a connected descriptorThis descriptor is used to communicate with the newly connected customerAccept returns a new descriptor for each customer connected to the server7. Returns the current time and date, which is actually the number of seconds since 1970.1.1:00:00ticks = time(NULL)8. The output can be visually readable time formatHere the out

automotive production 1908 10,0001913 300,0001924 2 million Ford car assembly time per car 1908 12h1913 93min1927 24s Ford Motor makes invention a mother of necessityAutomobile Economy Automobile CultureThe Industrial Revolution is a large-scale use of natural forcesThe Industrial revolution made Europeans take a step towards the development and use of natural forces.The significance of Industrial revolution The s

specifiers affect formatting. See the descriptions in this table.CodeSample section. Format description: output of the current regionD en-US 4/10/2001D en-NZ 10/04/2001D de-de 10.04.2001D en-US Tuesday, 10000l 10,200 1T en-US 3:51:24T es-es 15:51:24F en-US Tuesday, 10000l 10,200 1 pmF fr-fr Mardi 10 avril 2001R en-US Tue, 10 Apr 2001 15:51:24 GMTR ZH-SG Tue, 10 Apr 2001 15:51:24 GMTS en-US 2001-04-10t15: 51: 24S Pt-Br 2001-04-10t15: 51: 24U en-US 20

{4 intN;5 if((n = socket (family, type, protocol)) 0)6Err_sys ("Socket Error");7 return(n);8}View CodeA simple time to get the server program1#include"Unp.h"2#include 3 4 int5MainintargcChar**argv)6 {7 intlistenfd, CONNFD;8 structsockaddr_in servaddr;9 CharBuff[maxline];Ten time_t ticks; One ALISTENFD = Socket (Af_inet, Sock_stream,0); - -Bzero (AMP;SERVADDR,sizeof(SERVADDR)); theservaddr.sin_family =af_inet; -SERVADDR.SIN_ADDR.S_ADDR =htonl (inaddr_any); -Servaddr.sin

) Proxy_connect_timeout 15s; #连接超时 Proxy_read_timeout 24s; #读超时 Proxy_send_timeout 10s; #写超时 } Description Nginx timeout settings are very clear and easy to understand, the above time-out for different modes of operation, but because the time-out caused by a lot of problems. Extended reading: Http://hi.baidu.com/pibuchou/blog/item/a1e330dd71fb8a5995ee3753.html Http://hi.baidu.com/pibuchou/blog/item/7cbccff0a3b77dc60b46e024.html H

does not have to call the BIND function before calling the function, because if necessary, the kernel determines the source IP address and selects a temporary port number as the source port.In the case of a TCP socket, calling the Connect function will fire the TCP three-way handshake and return only if the connection is successful or error, where there may be several situations where an error is returned.(1) If the TCP client does not receive the SYN sub-section response, it returns a etimedou

=a+1, ..., n=b.InputThe input contains at most test cases. Each test case begins with 3 integers a, B and C, where C is the number of lost cards. The next line contains C strings, representing the lost cards. Each card was formatted as ValueS, Valueh, VALUEC or valued, where value is a composite integer. No. Lost cards is the same. The input is terminated by a=b=c=0. There'll is at the most one test case where a=1, b=50,000 and cOutputFor the test case, print b-a+1 integers Since the numbers mig

This article is senlie original, reproduced Please retain this address: http://blog.csdn.net/zhengsenlie /*** Call getaddrinfo and udp_server over UDP **/ # Include "unp. H" # Include Int Main (INT argc, char ** argv) { Int sockfd; Ssize_t N; Char buff [maxline]; Time_t ticks; Socklen_t Len; Struct sockaddr_storagecliaddr; // 1. Use udp_server to obtain the socket If (argc = 2) Sockfd = udp_server (null, argv [1], null ); Else if (argc = 3) Sockfd = udp_server (argv [1], argv [2], null ); E

There are several errors in this program, which are actually very simple errors. In a few days, I am sending them correctly. Compile and run in linux. Server: # Include # Include # Include # Include # Include # Include # Include # Deprecision MAX_LINE 256 Int main (int argc, char ** argv){Int listenfd, connfd;Struct sockaddr_in servadd; Char buff [MAX_LINE];Time_t ticks; Listenfd = socket (AF_INET, SOCK_STREAM, 0 );Bzero ( servadd, sizeof (servadd ));Servadd. sin_family = AF_INET;Servadd. sin_

Realpath= Bucketpath.escapestring (FilePath, headers,NULL,false, Calendar.second, 1,false); String Realname= Bucketpath.escapestring (fileName, headers,NULL,false, Calendar.second, 1,false); }LongEnd =System.currenttimemillis (); System.out.println ("End time is:" + End + ". \ntotal time is:" + (End-start) + "Ms."); }}The following 5 parameters of this method we generally do not need to use, so this is actually set to the actual value of no effect. Headers parameter to have "timestamp" paramete

*******/Bzero (Buf,buflen);Len = recv (newfd,buf,buflen,0);if (Len >0 !strncmp (buf, "Time", 4)) {Bzero (Buf,buflen);/* Get the current time of the system */now = time (NULL);/*ctime converts the system time to a string, sprintf the converted string to buf*/sprintf (buf, "%24s\r\n", CTime (now));Send System Time *******/Send (Newfd,buf,strlen (BUF), 0);}/* Turn off the communication socket */Close (NEWFD);}}int main (int argc, char **argv){int sockfd

1. Use the Read function to return the story of length 0: Closes the connection to the end, and the service side calls the close function.//INTRO/DAYTIMETCPCLI.C while((n = Read (SOCKFD, Recvline, MAXLINE)) >0) {Recvline[n]=0; if(Fputs (recvline, stdout) = =EOF) Err_sys ("fputs Error");}if(N 0) Err_sys ("Read Error");/*-------------------------------------------------------------*///intro/daytimetcpsrv.c for ( ; ; ) {CONNFD= Accept (LISTENFD, (SA *) NULL, and NULL); Ticks=Time (NULL); snprintf (

after that and then the connect times out after a total of around seconds.On Linux However, the default retry cycle ends after just seconds. Linux does send SYN retries somewhat faster than bsd-derived Kernels-linux supposedly sends 5 SYNs in this seconds, b UT this includes the original packet (the retries is after 3s, 6s, 12s, 24s).The end result though is so if your application wants a connect timeout shorter than 20s, no problem, but if your appl

-size and Particle-positon two animated effects */animation:particle-size. 24s linear Infinite, Particle-positon. 48s linear infinite Alternate;} @keyframes Particle-size {/* This keyframe named Particle-size is used to animate the background size change */from {background-size:6px 6px, 12px 12px;} To {background-size:12px 12px, 24px 24px;}} @keyframes Particle-positon {/* This keyframe named Particle-positon is used to animate the backgro

server's well-known ports to sockets Bzero (servaddr, sizeof (SERVADDR)); servaddr.sin_family = af_inet; SERVADDR.SIN_ADDR.S_ADDR = htonl (Inaddr_any); Servaddr.sin_port = htons (13); Bind (LISTENFD, (sa*) servaddr, sizeof (SERVADDR)); Switch the socket to a listening socket so that the foreign connection from the customer can be accepted by the kernel on that socket Listen (LISTENFD, Listenq); Accept customer connection, send answer for (;;) { // CONNFD = Accept (LISTENFD, (sa*) null, NULL); T

, "RB") md5f = MD5 () STRs = "" While True: STRs = File.read (8096) if not strs:break md5f.update (strs) FILEMD5 = MD5 F.hexdigest () File.close () return filemd5 except:logging (' MySQL Check ', ' ERROR ', traceback.format_e XC ()) def get_em_ipaddr (dev): s = socket.socket (socket.af_inet, socket. SOCK_DGRAM) IP = Socket.inet_ntoa (Fcntl.ioctl (S.fileno (), 0x8915, # siocgifaddr struct. Pack (' 24s ', dev)) [20:24]) return ipdef ipaddr (): "" "Get h