Linux

Linux system kernel settings optimized TCP network, # vi/etc/sysctl.conf, add the following Net.ipv4.tcp_syncookies = 1 indicates that SYN Cookies are turned on. When there is a SYN wait queue overflow, cookies are enabled to protect against a

blocking and non-blocking IO in Linux device drivers:Blocking and non-blocking in 1.Linux device drivers Summary: http://m.blog.csdn.net/blog/dongteen/17264501Blocking and non-blocking io:http://m.blog.csdn.net/blog/dongteen/17264501 in 2.Linux

This lesson is mainly to explain how to learn Linux and learning the attitude and thinking of Linux, so that we have a general framework for learning to learn Linux in the future lay the foundation.This article is from the Linux learners blog, so be

Server information is as followsExternal network server: eth0: Public network IPEth1: Intranet IP (192.168.10.205)Public network to provide services, intranet IP and internal LAN communication.Configuration Process :(1) Open iptablesService iptables

The following commands are mainly used in the command, for some often used, collect information, summed up.Instruction Directory:1.yum2.wget3.tar1.yum command:Yum (full name Yellow dog Updater, Modified) is a shell front-end package manager in

The shell command in Linux is usually the execution step: the user enters the command in the terminal, the system kernel reads the value of the environment variable in the current user's environment variable path The value of the variable is the

The LS command is the most commonly used command under Linux. The LS command is the abbreviation for list. LS is used to print out the list of current directories if LS specifies a different directory then the list of files and folders in the

Ystem.out and System.err are printed to catalina.out. Catalina.out will not rotate. Generally after the deployment of Tomcat, run for a long time, the Catalina.out file will be more and more large, the stability of the system has caused a certain

1, vi/etc/sysconfig/susefirewall2 #编辑防火墙设置Fw_services_ext_tcp= ""#开启22端口RcSuSEfirewall2 Restart #重启防火墙System operation and maintenance www.osyunwei.com warm reminder: qihang01 original content copyright, reproduced please indicate the source and the

To install the Zabbix Agent script:#!/bin/bash#the zabbix path you want to installprefix= "/usr/local/zabbix"   Configfile= "/etc/zabbix/zabbix_agentd.conf" # list of comma delimited ip  addresses  (or hostnames)  of zabbix servers. Server=

Linux Process Scheduling analysis and linux scheduling AnalysisOverview Multi-process scheduling is essential for the operating system. Some people say that process scheduling is the most important part of the operating system. I think this is an

30 things to be done after minimal RHEL/CentOS 7 installation (4) 30 things to be done after minimal RHEL/CentOS 7 installation (4)17. Install Webmin Webmin is a Web-based Linux Configuration tool. Like a central system, it is used to configure

Configure port forwarding in Centos to forward port 80 requests to port 8080 Apache is deployed in Linux. To ensure security, we use a non-root user to start the service. However, when binding a domain name, we cannot directly access port 80. As we

Add an SSL certificate to Nginx in CentOS to support HTTPS access SSL (Secure Sockets Layer) and its successor Transport Layer Security (TLS) are a Security protocol that provides Security and data integrity for network communication. TLS and SSL

Check how long the CentOS system has been running the uptime command It does not matter how long the system has been running for some people, but it is very important for the server administrator. When running important applications, the server must

OpenDaylight Helium (Helium) version installation The Helium (Helium) version of OpenDaylight (ODL) has been released. For details, refer to the ODL official website. Only one version of Helium (Helium) is released. The download link is

Linux SSH without a password login, linuxssh password login I. ssh schematic: 1. the user name and password are not required for two linux machines to use ssh. Digital signature RSA or DSA is used to complete this operation. 2. Model

Install Gitlab5.1 full version in CentOS I found many blogs and found that Gitlab is installed on Ubuntu or Fedora. Basically, there are errors Based on CentOS. This article is myThe results of the two-week Continuous testing work overtime are

Basic Hadoop tutorial This document uses the Basic Environment configuration of the K-Master server as an example to demonstrate user configuration, sudo permission configuration, network configuration, firewall shutdown, and JDK installation.

Install Kafka cluster in Centos Kafka is a distributed MQ system developed and open-source by LinkedIn. It is now an incubator project of Apache. On its homepage, kafka is described as a high-throughput distributed MQ that can distribute messages to