linux mqtt client

First, the client#include #include #include #include #include #include #include #include #include void Main (){char send_data[20]= "IM sender data";int FD;struct sockaddr_in local_addr,to_addr;fd=Socket(af_inet,scok_dgram,0);if (fd{printf ("Create socket Error");Return}Local_addr.sin_family=af_inet;Local_addr.sin_port=htons (7777);Local_addr.sin_addr.s_addr=inaddr_any;To_addr.sin_family=af_inet;To_addr.sin_port=htons (8888);To_addr.sin_addr.s_addr=ina

Many of them are very interesting to me, such as:NeteasecloudmusicForked from Yanunon/neteasecloudmusicNetEase Cloud MusicWizqtclientForked from Wizteam/wizqtclientCross-platform Client for notesQt5-cadaques-in-chineseForked from Cwc1987/qmlbook-in-chineseQt5 Cadaques in ChineseQt360Using the QT4 Analog 360 10.0 InterfaceQtavForked from Wang-bin/qtavFlat.qmlForked from QYVLIK/FLAT.QMLFlatui by QML, reference Flatui design a set of QML controlsEasypain

. Open Xstartup Configure desktop#vim/root/.vnc/xstartupChange the last line toGnome-session 6 finally is the firewall problem, want to let others can log in, you have to open the port of VNC let others come in, many people think that the configuration of iptables, but still can not, then we will be quiet to see if you and my iptables rule corresponds.==================== First Look at the VNC port =========================[[emailprotected]~]#netstat-nltup|grepvnctcp 000.0.0.0:6002 0.0.0.0:* LIS

In Linux, the total number of oracle clients is less than 40 MB, which is very convenient and quick to install. 1. First, check the directory structure after downloading: Copy it to linux. 2. Use the root user in the command line window to operate in the rpm directory: Rpm-ivh... rpm Rpm-ivh... rpm Rpm-ivh... rpm Rpm-ivh... rpm (Install the four RPMs separately. Install the basic one first, and install the

In Linux, the total number of Oracle clients is less than 40 MB, which is very convenient and quick to install. 1. First, check the directory structure after downloading: Copy it to linux. 2. Use the root user in the command line window to operate in the rpm directory: Rpm-ivh... rpm Rpm-ivh... rpm Rpm-ivh... rpm Rpm-ivh... rpm (Install the four RPMs separately. Install the basic one first, and install the

]# tail-3/byrd/svnpasswd/authz[linuxerdox:/]Byrd = RW* =[Root@svn-server svndata]# NETSTAT-TUNLPActive Internet connections (only servers)Proto recv-q Send-q Local address Foreign address State Pid/program NameTCP 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1052/sshdTCP 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1129/masterTCP 0 0 0.0.0.0:3690 0.0.0.0:* LISTEN 1267/svnserveTCP 0 0:: £ º::* LISTEN 1052/sshdTCP 0 0:: 1:25:::* LISTEN 1129/master[Root@svn-server svndata]# Pkill Svnserve[Root@svn-server svndata]# svnserv

Problem background: After you deploy the OVF template in vsphere client, you are prompted to start Linux network: Device eth0 does not seem to be present, delaying initialization The device eth0 is not ready to delay initialization as shown in the figure: The problem is that the MAC address in the exported OVF template is the source system's Mac (configuration file is the configuration file for the sou

Install the oracle client in linux 1. Prepare the required installation package. Oracle-instantclient-basic-10.2.0.5-1.i386.rpmOracle-instantclient-devel-10.2.0.5-1.i386.rpmOracle-instantclient-jdbc-10.2.0.5-1.i386.rpmOracle-instantclient-sqlplus-10.2.0.5-1.i386.rpm Install oracle-instantclient-basic-10.2.0.5-1.i386.rpm first, install other 2. Create users, groups, and directories [Root @ wxcs-2 oracle] # g

management cost.Support autonomous reconfiguration of complex application systems in the face of new application goals and changing environmentsSupport Self-diagnosis and recovery of complex application SystemsSupport autonomous optimization of complex application SystemsSupport for autonomous protection of complex application systemsHigh AvailabilityProvide secure, trusted information servicesSupports large-scale concurrent client accessProvides mor

=INET_ADDR (SERVER_IP);//Server IP AddressLocal_addr.sin_port=htons (Server_port);//Server port number intBind_result = Bind (FD, (structsockaddr*) local_addr,sizeof(structsockaddr)); if(Bind_result 0) {cout"Bind Error in main ()"Endl; return-1; } cout"bind_result="Endl; //---------------------------------------------Listen (FD,Ten); structsockaddr_in remote_addr; intSin_size=sizeof(structsockaddr_in); cout"before accept"Endl; intNEW_FD = Accept (FD, (structsockaddr*) remote_addr, (socklen_t*

you can view the dynamic log. CTRL + C exit6. Cope folder inside the server, enter the corresponding directory and enter: Cp-r Original file target file7. Delete a file directory (if you change-R to-rf, you will not be confirmed every time): Rm-r target file8. Delete a file directly (you will be prompted to delete when performing the deletion, enter: Y for confirmation); RM target File9. Open an editable file: Vim Server.xml will open the contents of this file in the terminal, but this time can

locally " Delete 1.txt " 1. txt # and then commit to the SVN server to really deleteHow to view the change log:[[email protected] myproject]# SVN log # View change log (from bottom to top) ------------------------------------------------------------------------R2| User1 |2018- ,-Ten -: ,: ++0800(Fri,TenThe2018) |1Linedelete1. txt------------------------------------------------------------------------R1| User1 |2018- ,-Ten -: on: to+0800(Fri,TenThe2018) |1Lineadd1. txt---------------------

Original link: http://www.hao32.com/unix-linux/462.htmlConfiguration Files ~/.ssh/config and/etc/ssh/ssh_config14.01.You generally do not need to modify the OpenSSH client configuration file. For a given user, there are two profiles, ~/.ssh/config (user-specific) and/etc/ssh/ssh_config (global sharing). To read these files in that order, for a given parameter, it uses the first configuration found in the re

There is an existing ***.tar.gz client software, now the client installation steps are as followsDescription: This software is a network client authentication software, because the Linux host in the virtual machine, so this host network configuration from only use bridge mode, but not the use of NAT mode.Because this h

Article Title: tasque: RTM client on linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. RTM, remember the milk is one of the most popular websites to be done online. If you are

Every time you log on to the server, you have to enter your username and password, which is troublesome. Therefore, you may want to use a specified user to log on automatically. Collect the information on the Internet: Tools: Putty Puttygen Steps: 1. Use puttygen to generate an SSH2 RSA key and save the key file as authorized_keys; 2. Upload the content in "Public Key for pasting into authorized_keys file" in puttygen to the remote server ~ /. Ssh/authorized_keys file; 3. Set Putty: Connection/s

Label: 2016-4-6 14:17:15Preparation before installation:1/install Boost library2/Install SCons programMethod One:$ git clone git://github.com/mongodb/mongo.git$ CD MONGO$ cat Docs/building.md$ scons.After a period of compilation, the server side and client of MongoDB can be generated, as well as the C + + client library.Method two: Compile with scons (to install the SCons program first)Download MONGO source

, such as: the first record {name: "Xiaoming"}, the second record: {name: "Xiaoli", age:15}, which is not possible in the relational database. For MongoDB, Where: Collections is the collection of tables that are equivalent to relational databases, and document documents are equivalent to rows in a relational database. So that is to say, the data stored in a table in MongoDB can be non-defined type, etc. Let's take a look at some of the basic operations of MongoDB's own shell client.Let's take a

Work we use is the company set up a good environment, want to create a server at home to do some technical research, at this time will encounter a variety of problems, the most important thing is to the computer can connect the server, or nothing can be done, now we will solve the client and service-side connectivity issues:The first step: Get the tools you need. VM Virtual Machines DR3 FileZilla Jdk Tomcat JSP Source code

I reviewed the Linux socket programming, wrote the simplest server and client programs, and passed the test. The server-side programs adopt the loop and busy waiting mechanism, which will be changed to multithreading and thread pool mechanism later. Server programs #include Client Program #include