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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 ...

!!!!! Container can only be created with image!!!!! , write it down, take the test!Download a centos image before you talk about the container operation command (this command is available in the previous "common Docker image operation command". Students who don't know can go to see it) //First check centos. [root@iz Two ze0lvzs71710m0 ...

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 ...

Preface: Recently, I have sorted out some previous study notes (some of them are missing, some of them will be disordered, and I will make up later). In the past, it was stored locally, and this time it was transferred to the network for standby.   cisco SSH Remote Login configuration 0. Configure ip, start port Switch>enable ...

Catalog Tree menu Data tables and paging This is my project hierarchy. Tree menu Today is based on the last improvement, access to background data, dynamic display of the tree menu, and then the menu can click to jump to different pages. The data used the code of the last SSH tree menu and Book ...

A hadoop pseudo-distributed environment is built using virtual machines to simulate a small-scale cluster for learning. Install a centos7 system in the virtual machine ip host name 192.168.158.30 hadoop.master 1. Installing the java environment I installed JDK 1.8 Installation method: https://blo ...

Many people will struggle between saltstack and ansible. Whether saltstack is good or ansible is good. First of all, we should realize the advantages and disadvantages between them.Saltstack is based on zero mq messaging system, which can achieve high concurrency (theoretically, a salt-master can concurrently run 1000 minions in a short time), ...

1. ssh Secret-Free Login ssh ip address [root@192 ~]# ssh 192.168.1.102 root@192.168.1.102's password: Last login: Mon Feb 18 20:40:28 2019 from 192.168.1.101 Secret-free login configuration Generating public and private keys [root@192 ~]# ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which t ...

Distribution System-expect yum install -y expect //Automatic remote login #! /usr/bin/expect set host "192.168.133.132" set passwd "123456" spawn ssh root@$host expect { "yes/no" { send "yes\r"; exp_continue} "assword:" { send "$passwd\r" } } interact After automatic remote login, execute commands and exit #!/usr/bin/expect set user "roo ...

Centos Foundation and Installation Centos installation 1. Linux version derivation |- AT&T Unix: AT&T was originally developed, and later set up Bell Laboratory with Western Electric Company to continue to develop Unix from UNIX to UNICS (UNiplexed Information and Computing Service), while ...