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1. Introduction to Docker Mirrors 1. Introduction of Mirror Composition      Hierarchical, with bootfs at the bottom and rootfs above bootfs can be of type btrfs, aufs, lxc and require a kernel, but this kernel is only for user controls that launch containers rootfs is represented as a root file system, which contains many files and directori ...

[LINUX]CentOS7 configure jdk environment Please support originality and identify DannisTang (tangweixuan1995@foxmail.com) If the Java environment is installed under linux, but the java file path is not specified in the configuration file, the installation directory cannot be found with echo. Please refer to another article o ...

1. Introduction of Network Virtualization Technology 1. What is a virtualized network A virtualized network is a network virtualized by the linux kernel. In fact, the linux kernel can emulate a variety of network devices Analog network devices: Analog network devices appear in pairs, one in containers and one in switches Analog switches: Cont ...

zabbix is an enterprise open source solution based on the WEB interface that provides distributed system monitoring and network monitoring capabilities. The zabbix consists of two parts, the zabbix server and the optional component zabbix agent. zabbix server can provide remote server/network status monitoring, data collection and other func ...

1. View file properties: ls -l filename - rw-rw-r-- 1 kiosk kiosk 0 Oct 2 17:05 file [1] [2] [3] [4] [5] [6] [7] [8] //notes: [1]file type - # Common documents d # catalog s # Socket socket, the open interface of a progra ...

PG starts psql locally, accesses external tables, and exits The connection between PG and remotePG is broken as the client psql exits.   PG starts multiple psqls locally, and each psql accesses the external table once View remotePG process postgres@ubuntu:~$ ps -ef|grep post root 134 89 0 09:36 pts/0 00:00 ...

Installing maven in linux Download decompression wget -c http://apache.claz.org/maven/maven-3/3.5.4/binaries/apache-maven-3.5.4-bin.tar.gz tar -zxvf apache-maven-3.5.4-bin.tar.gz Import environment variables Open file vi /etc/profile export MAVEN_HOME=/usr/local/apache-maven-3.5.4 export MAVEN_HOME export PATH=$PATH:$MAV ...

swoole optimized configuration and stress test 1, Server hardware: 2, Server side: 3, Client: Modify the following file: vim /etc/sysctl.conf Configuration and installation of pressure measuring tools: 4, Server kernel optimization: 5, Testing 1, Server hardware: 2 vCPU 4 GB (I/O optimization) 100Mbps (peak) 2, Se ...

Insert node When we want to insert a single node, we can use the insertBefore() and appendChild() methods. If we want to insert multiple content, we need to use DocumentFragment. It is a strategy to use the insertion method repeatedly, but in this way, the browser will render the DOM tree continuously, which will affect the us ...

Configuration setting The server operating system IP address SQL SERVER Windows 2003 10.9.5.47 Oracle DB Linux 5.8 10.9.5.90 Oracle Gateways 1. Install transparent gateway After Oracle 11G, Gateways under linux ...