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1. Introduction to GlusterFS: GFS is an extensible distributed file system for large, distributed applications that access a large amount of data.It runs on inexpensive common hardware and provides fault tolerance.It can provide high overall performance services to a large number of users. Open source distributed file system;It consists of a s ...

MongoDB is a database based on distributed file storage. Written in C + +. It aims to provide scalable high-performance data storage solutions for WEB applications. MongoDB is a product between relational database and non relational database. It has the most abundant functions and is the most like relational database.1. Download and unzip mong ...

Blog Outline:I. migration mode of KVM virtual machineII. Static migration of KVM virtual machineIII. dynamic migration of KVM virtual machine I. migration mode of KVM virtual machine KVM virtual machine migration in KVM platform is divided into the following two types: (1) cold migration (static migration) The directory where we store the vi ...

It was originally modified with chown / chmod, but it was restored to its original shape after a day It is found that logrotate is the program that will modify the log every day when dumping it. Check the configuration file /var/log/messages {     compress     dateext     maxage 365     rotate 99     missingok     notifempty     size +4096k   ...

I. check iptables service status First check the status of iptables service [root@woxplife ~]# service iptables status iptables: Firewall is not running. The iptables service is installed, but the service is not started. You can install it directly if it is not installed. yum install -y iptables ...

redis Download and compile wget http://download.redis.io/releases/redis-4.0.2.tar.gz tar xzf redis-4.0.2.tar.gz cd redis-4.0.2 make Startup service Start redis in the background cd redis-4.0.2/ src/redis-server & Query redis process ps -ef | grep redis You can see that redis has been started. root 19141 19065 0 12:50 pts/1 00:00:03 ...

This is a basic operation example of Firewalld, using the Firewalld graphical operation interface for access control operation. Experimental topology requirement analysis First, the topology involves two regions. Here, work and public regions are used to make corresponding rules. 1. icmp is forbidden in the work area. 192.168.100.101 is allo ...

Simple Experiments of Firewall Dual Hot Standby Experimental topo: The purpose of the experiment is: Familiar with dual hot standby principle Network Planning of Dual Machine Hot Standby Experiments need: Enterprises deploy dual hot standby and connect routers upstream and downstream in the ...

Catalog New user Authorization for new users Method 1: Add a new user to the wheel user group Method 2: Add new users to sudoers list New user enabled SSH key login Other Prohibit root users from using SSH to log in Using unconventional SSH ports Prohibit ping ...

1. Software Installation1.1 Update System yum -y install wget vim-enhanced mkdir /etc/yum.repos.d/backup mv /etc/yum.repos.d/{*.repo,backup} wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.163.com/.help/CentOS7-Base-163.repo wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo rm -rf /var/cache/yum rm -rf /va ...