linux ntp client

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Implementation of TCP server and client in Linux under C language learning

) and any host communication//inaddr_any means that data that can receive any IP address is bound to all IPServer_addr.sin_port=htons (PortNumber); (Convert short data on this machine to short data on the network) port number/* Bundle SOCKFD Descriptor to IP address */if (bind (SOCKFD, struct sockaddr *) (SERVER_ADDR), sizeof (struct sockaddr)) ==-1){fprintf (stderr, "Bind error:%s\n\a", Strerror (errno));Exit (1);} /* Set the maximum number of clients allowed to connect */ if (Listen (sockfd,

Linux programming-Multi-Client (15th chapter)

servers waiting for messages, while the main process will continue to wait for new connections. The SERVER4 process is waiting for new customers, While 3 client processes are being serviced by 3 server sub-processes. After a 5-second pause, all customers get their results and end up running. The server's child processes are also exited, leaving only the primary server process running.Server programsprocessing multiple customers with the fork function

Linux remote log rsyslog server and client installation (parental testing)--Custom receive log format __linux

Linux remote log rsyslog server and client Installation The reason for using Rsyslog:1. Prevent system crashes unable to get system log share crash reason, with Rsyslog can transfer log to remote log server2. Using the Rsyslog log can reduce system pressure because using Rsyslog can effectively reduce the system's disk IO3.rsyslog using TCP transmission is very reliable, can filter the log, extract the effe

"Notes" "Informatica" Java component calls SSH client to execute shell script on Linux system remotely

try{String cmdstr= "C:\\ssh\\ssh2.exe [email protected]/home/azik/tmp/echo_date.sh";Process mypro=runtime.getruntime (). exec (CMDSTR);Mypro.waitfor ();Integer Errno=mypro.exitvalue ();Loginfo ("The ERRORLEVEL is:" +errno);Mypro.destroy ();if (errno! = 0) {LogError ("Execute Cmd Fail.");Failsession ("Catch exception!");}} catch (Exception e) {LogError (E.tostring ());Failsession ("Catch exception!");}"Notes" "Informatica" Java component calls SSH client

SVN client user guide in Linux

SVN client user guide for Linux svnaddvalues/strings. xml // -- add www.2cto. comsvnst // -- View status svnci // -- submit svnci-m quot; svnci, permission quot; 1. run the file checkout to the local directory svnc... SVN add values/strings. xml // -- add www.2cto.com svn st // -- View status svn ci // -- submit svn ci-m "svn ci, permission "1. run the file checkout to the local directory svn checkout pat

Samba Services Windows Client Access Linux share error

Error notificationOne user is not allowed to use more than one user name with multiple links to a server or shared resource. Terminal all connections to this server or shared resource, and then try again.WorkaroundThe reason is that the machine used now has been connected with the server, the connection is disconnected after the operating system does not clear the connection state;Run the following command under CMD to clear the list of system records.net use * /del /ySamba Services Windows

Server crashes on Linux socket programming client shutdown

1, the problem is mainly due to the closure of the socket to send data generation, that is, call the Send function to send data2, when sending data to the closed socket, when the send buffer is not full, the value returned by the Send function is still greater than 0, and when the send buffer is full, returns-13. When the Send function is called two times to the closed socket, a sigpipe signal is generated, which is handled by the end of the socket thread4. Solutions(1) Call signal (sigpipe,sig_

Linux SVN client common commands

:2016-05-09 11:40:24 +08 XX (Mon, 11:40:03) Text last updated:2016-05-09-+0800 (Mon, May) checksum:6f9361a19c3f7bb3c06d0fdadbfe 479bCompare DifferencesSVN diff path (compares the modified file to the base version)Example: SVN diff test.phpSVN diff-r m:n Path (difference between version m and version N)Example: SVN diff-r 200:201 test.phpShorthand: SVN di[Email protected] webtest]# svn di-r 1:3 index.html index:index.html================================================ ===================---index

Linux Client accesses NFS Datagram Permission denied error

When accessing the NFS shared directory on a Linux server, error: Permission denied. As shown below:Because this NFS is configured by the system administrator, I am not aware of the specifics, and the system administrator is on leave, not in contact. So I'll just get to know more about NFS.1: First See if the NFS component (Nfs-utils), RPC component (PORTMAP) is installed.Rpm-qa | grep NFSRpm-qa | grep protmap2: Check whether the RPC service is starte

Linux Install SVN client subversion and how to use it

local files. This is the one where the working copy corresponds to a branch or tag in the same warehouse. method. 2, rewrite the working copy of the URL metadata to reflect the simple URL changes. When the root URL of the warehouse changes (such as scheme name or host name change), but the working copy is still used when mapping to the same directory in the same warehouse This command updates the corres

The construction of Smba server and the use of the client in Linux

off SELinux: /blockquote> 1, temporary shutdown (without restarting the machine): setenforce 0 and nbsp;# #设置SELinux become permissive mode

Install Oracle client and SQLLDR on Linux

1, the establishment of Oracle installation directory, generally/opt/oracle;2, put the installation package instantclient-basic-linux.x64-11.2.0.3.0.zip into the directory, and extract: Unzip XXX, generate directory:/opt/oracle/instantclient_11 _2;;3. Create a new Tnsnames.ora file in the/opt/oracle/instantclient_11_2 directory to write the database connection information;4. Configure environment variables:/ect/profile fileExport Oracle_home=/opt/oracleexport Nls_lang=american_america. ZHS16GBKE

Install oracle12.1 client separately under Linux

Tags: des style io os ar file Data SP 20141, install Oracle-instantclient: (default installation can be)oracle-instantclient12.1-sqlplus-12.1.0.1.0-1.x86_64.rpmoracle-instantclient12.1-devel-12.1.0.1.0-1.x86_64.rpmoracle-instantclient12.1-basic-12.1.0.2.0-1.x86_64.rpm2, the configuration environment variable, modifies the/etc/profile, the file finally joins the following content:Export Oracle_home=/usr/lib/oracle/12.1/client64Export Ld_library_path=/usr/lib/oracle/12.1/client64/libExport path= $

CentOS Redhat Linux Install Oracle Client Note points

Label:1) installation files to be copied to local file system execution2) Although I do not know what LIBXMU is, but after installation, the associated package installed a lot, feel very worryYum Install libxmu.i6863) If you can't find a package, it's a good choice to use Yum search 4) You need to write Tnsnames.ora manually and configure the TNS_ADMIN environment variable. You can copy from a Windows machine, but be aware that EOL is going to be converted into UNIX-formatted line breaks.CentOS

Connecting a Googlecloud Linux virtual machine via a local client

" file you obtained in step 1.5Final login successful, enjoy.4.1 Open the Script Editor.Use the Tera term script to create an automatic logon script.4.2 We use the template to create, check the SSH2 connection4.3 appropriate changes to some parameters, lazy words, you can directly remove the password in the script.Here the main need to modify is the IP, private key file path.4.4 Click the Green Triangular "Run" button on the menu bar to test.4.5 The operation of selecting the key is automaticall

Use a Linux virtual machine to install CentOS6.4 and vspherecentos6.4 In the VMware vSphere Client.

Use a Linux virtual machine to install CentOS6.4 and vspherecentos6.4 In the VMware vSphere Client. Preface: companies need to prepare virtualization to virtualize physical machines with high configurationsNVirtual machines to provide services for more application services. 1. Connect to the physical machine using the vShere client, select "configuration"> "Stor

Configuration of Linux LDAP authentication server and client pam network verification instance

Configuration of LDAP authentication server in Linux and client pam network verification instance 1] LDAP introduction LDAP (LightweightDirectoryAccessProtocol) represents Lightweight Directory Access Protocol LDAP is a kind of non-relational database LDAP... configuration of Linux LDAP authentication server and client

Try the Baidu cloud client on Linux

I use Linux is startos5.1, blog is i in http://vb2005xu.iteye.com/blog/2119240 My local GCC version iswrote [email protected]:~/softken$ gcc-vUse built-in specs.collect_gcc=gccCollect_lto_wrapper=/usr/lib/gcc/i686-pc-linux-gnu/4.6.3/lto-wrapperTarget: I686-pc-linux-gnuConfigured as:.. /configure--prefix=/usr--sysconfdir=/etc--libdir=/usr/lib--localstatedir=/var--

Installing the CentOS6.4 system with a Linux virtual machine under VMware vSphere client

Preface: to prepare for virtualization, the company will virtualize the physical machines that are relatively high N virtual machines so that more application services can be served. 1, use Vshere client to connect to the physical machine above, select "Configuration"--"Memory"-"data Storage", right click Select "Browse Datastore", you can upload the file, as shown in:?2. Upload the Centos.iso files that need to be installed.3. Right-click to start c

Nagios Client Installation steps in Linux and problems encountered

# at the end of the file, if you do not add a port,Nrpe will not function properlyNrpe 5666/tcp #nrpeNrep is a xinetd based service, so just turn on the xinetd service .[Email protected]~]#/etc/init.d/xinetd Restart[[Email protected]~]# Netstat-na | grep 5666issue: Unable to detect port 5666 after installation. Problem solving:1, check whether XINETD service is turned onNo, and cannot be turned on. Cause: The XINETD service is not installed. Installing the XINETD service solves the problemYum i

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