linux smtp server

. As we all know,linux system everything is a file, so each process has its file descriptor, The Nginx process writes its own file descriptor to the Nginx.pid, and we need to tell Nginx to reopen a new log file (the configuration details of the log file can be seen here, simply by letting the log record what. So we need this directive:kill -USR1 `cat ${pid_path}`This instruction means: first cat to Nginx PID, is an integer, and then send the signal

Install and configure the DNS server in linux, and configure the dns server in linux 1. DNS concept: Simply put, DNS is a service on the system that uses port 53 to provide mutual conversion between domain names and IP addresses. For example, if you access www.csdn.net, the router cannot know the address. You need to

Synchronization of ntpd server time in linux and ntpd server in linux Use Ubuntu14.04 to synchronize ntpd network time. Http://www.douban.com/note/171309770/ You can obtain common ntpd addresses and use commands to directly synchronize the server time: Root @ android:/ho

Linux Client/Server programming paradigm 2 -- Concurrent Server (process pool), linux paradigmIntroduction Let the server call fork to create a sub-process pool during the startup phase and process client requests through sub-processes. Use socketpair to communicate with the

Build an ftp server in linux and an ftp server in linux Online InstallationYum install vsftpd pam * db4 *-yUse the command to configure vsftp as a system serviceChkconfig -- level 35 vsftpd on 2Configure the host of the vsftpd serviceUseradd vsftpdadmin-s/sbin/nologin-MThis vsftpdadmin is only used to replace the ro

Linux Server install Dream cms,linux server weaving dream cms Installation article First Step: Configure the Firewall (By default, ports 80 and 3306 are denied access and are configured on the firewall): Vi/etc/sysconfig/iptables ( Add the following two sentences on the previous line of "COMMIT") -A input-m s

Security Configuration of nginx on Linux server, nginx on linux Server1. Common sense In linux, to read a file, you must first have the execution permission on the folder where the file is located, and then read the file. The execution of php files does not require the execution permission of the files. You only nee

Article Title: Use Qmail in Linux to create a department email server. 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. 　　 I. installation environment Installation Platform: RedHat

Build a DNS server in Linux and a dns server in linuxSystem Environment: CentOS 6.5 miniIP Address: 192.168.100.1001. Install related software packages# Yum install-y bind * caching-nameserver2. Open firewall ports# Vi/etc/sysconfig/iptables-AINPUT-m state -- state NEW-m tcp-p tcp -- dport 53-j ACCEPT-AINPUT-m state -- state NEW-m udp-p udp -- dport 53-j ACCEPT-A

Matlab + X11 Give me the experience let me try not to feel bad, Linux fast and stable, X11 simple and practical. Considering that MATLAB is not used every day, the server is also placed, in order not to waste resources, should be further utilized and upgraded to become an application server, will be all infrequently used, do not need graphics accelerated applicat

Linux super server inetd and linux Server inetd The inetd service is a daemon process started by the rc program during linux boot initialization. It starts various services through listening ports. The process is tcp/udp services ----> (send a letter to port 5000) ----> inte

Tags: sleep cannot change auto--process group Nlog Openlog RDOSeventh Linux Server program specificationServer programs in addition to network communication, but also to consider a lot of other details, and these details are very miscellaneous, but the basic template-style. 1) server programs are basically run in the background, no control terminal, can not accep

Linux ntp time server configuration tutorial, ntp server configuration Network Time Protocol (NTP) is also a new test requirement for RHCE. During study, I also reviewed how to set the Linux Time. Now I will share it with you. It is not difficult to set up the NTP server, b

Build an FTP server in Linux and an ftp server in linux In Linux, we use vsftp as our ftp server. Server OS: Redhat 6.3 1. Check whether vsftpd is installed on the

LINUX-monitor server status and linux Monitoring Server This document describes how to monitor the operating status of linux servers, including CPU, hard disk, memory, network interfaces, and motherboard.How to monitor Hard Disks Core Ideology Use command df. Sample prog

whether there is a description statement for the SMTP port ); 6. Save the disk and exit. 7. Run the inetd command to make the settings take effect. 8. Run the following command to check whether the POP3 port is enabled (effective ). Netstat? A | grep pop If it is enabled, you can see the following information: Tcp 0 0 *: pop3 *: * LISTEN 　　 6.5.4 open an e-mail account for a new user In LINUX, it is very e

For more information about how to set up an email server-linux Enterprise Application-Linux server application in Linux, see the following. Setting up an email server Is it not detailed enough for me to write? The reading comrades

I. Introduction of FTP ServerFTP is the abbreviation for file Transfer Protocol (document Transfer Protocol), and Chinese is called "Interfax protocol".Used for two-way transmission of control files on the Internet.At the same time, it is also an application (application). There are different FTP applications based on different operating systems, and all of these applications follow the same protocol to transfer files.In the use of FTP, users often encounter two concepts: "Download" (Download) a

Linux server postfix service configuration postfix (MTA) mail System role 1, MUA (mail User proxy) mail/mutt foxmail outlook web2, MTA (mail Transmission proxy) exchange notes sendmail postfix qmail 3. MDA (Mail Distribution agent) Mail Application Protocol 1. SMTP, Simple Mail transmission protocol, TCP port 25, encrypted port 465, and mail, it generally works o

Server Security Dog Linux V2.5 is launched to make the user server more secureAre you still not used to using Linux? Are you still struggling to integrate Apache and Nginx? Server Security Dog Linux V2.5 is transformed. A new prot