Linux

Server Design technology has many, according to the protocol used to divide the TCP server and UDP server. The loop server and the concurrent server are divided by processing mode.1 cyclic server and concurrent server modelIn the network program, in

First, the concept of deadlock:　　1, the phenomenon of deadlock description:　　　　In many applications, a process is required to access several resources, rather than one, in an exclusive way. For example, two processes are prepared to record scanned

I. Miscellaneous Knowledge collation1, the program's data flow has three kinds:Input data stream, standard input stdin (keyboard)Output data stream, standard output stdout (display)Error output stream, standard output stderr (display)FD file

Linux Watch command-real-time monitoring of running results of commands Watch is a very useful command, basic all Linux distributions with this gadget, like the name, watch can help you monitor the results of a command, save you over and over

Find (locate because of the need to update the database, so not very common) is a very powerful Linux file Search command, with the following characteristics.1. Real-time, new files can be found immediately2. Precise3. Support many search criteria,

Feature Description:The script is used to transfer the local directory to the remote server on a regular basis (in conjunction with crontab), with each execution generating a time-named directory, and the current version of the data is linked to a

In addition to network communication, the server program must also take into account many other details of the problem, fragmented, but basically the template-style. ——— cited Linux server programs typically run in the background. Daemon is

Linux wget is a tool for downloading files, which is used at the command line. is an essential tool for Linux users, especially for network administrators, who often download software or restore backups from remote servers to a local serverLinux

Cron is a timed execution tool under Linux that can run a job without human intervention. Since Cron is a built-in service for Linux, it does not automatically get up, and you can start and shut down this service in the following ways:/sbin/service

Interrupts and exceptions, interrupts (generalized): The order in which the processor executes instructions is changed, usually relative to the electrical signals generated by the internal or external hardware circuitry of the CPU chip

Unix IPC: Pipelines, Named Pipes (FIFO) Piping 1. ConceptA pipeline is a one-way (half-duplex), first-out, non-structured byte stream that connects the output of one process with the input of another. The write process writes data at the end of

In the maintenance and use of the Linux system, often forget how to use the command, if there is no corresponding data, then how to do? Do not worry, the system itself provides a detailed manual for users to query, the following small series on the

Candidate URL:Http://www.ibm.com/developerworks/cn/linux/1407_liuming_init1/index.htmlThis series of three articles, after reading remember, that level is not the same.Brief analysis of Linux initialization init system, part 1th: sysvinitFrom

Basic concepts of tunneling tools:1. In a computer network, a tunneling tool is a technique that uses a network protocol to encapsulate another network protocol.2. Usually used for data camouflage or through the firewall, after the intrusion target

Linux provides a rich help manual that you do not have to look for when you need to see the parameters of a command, as long as you have a man. The Linux Man Handbook has several chapters:1, standard commands (command)2. System calls (Systems Call)3.

Ftp security settings and ftp Security 1. File Introduction Description of ftpuser and user_list files in/etc/pam. d/vsftpd; (ADD and change the file path after file =)Description of userlist_enable and userlist_deny in/etc/vsftpd. conf. For the

Linux BASICS (1), Linux BASICS ( 1. Five methods available for installing linux 1. CD2. Hard Disk3. NFS Image4. FTP5. HTTP There are two scenarios for hard disk installation: A. It is installed on Win System B. The installation is started from other

Install Node. js in CentOS The previous article used NSSM to deploy the Node. js solution on Windows servers. At that time, we saw a very popular solution pm2, which unfortunately did not support the win32 system. In the past two days, I installed a

Virtualenv Quick Start Guide1. virtualenv Overview virtualenvCreate an independent Python development environment tool to solve the dependency, version, and indirect permission issues. For example, if a project depends on Django1.3 and the current

How to install and use Zabbix in CentOS6.5Zabbix is an enterprise-level open-source solution that provides distributed system monitoring and network monitoring functions based on the WEB interface. Zabbix can monitor various network parameters to