Solution to the problem of inconsistency of domain file types in DNS master-slave server

Background The DNS server of the company has made master-slave configuration. When using the slave server for resolution recently, it was found that it could not be resolved inexplicably. After repeated checks, no problem was found in the configuration. When looking at the domain file, it was found that there was a gar ...

Posted on Wed, 01 Apr 2020 17:49:52 -0700 by davidska

Enterprise practice: batch deployment of multi version system based on Cobbler

Source: https://blog.51cto.com/scholar/1672176 Preface Operation and maintenance automation plays an important role in the production environment, especially in the face of hundreds, thousands or even tens of thousands of servers, it is just to install the operating system, if not through automation, ...

Posted on Fri, 28 Feb 2020 01:34:08 -0800 by vargefaret

Use postfix and dovecot to deploy your mail system--Learn Notes

The experimental environment is redhat 7.0 systemAs shown in the figure aboveClient uses outlook to send and receive mailThe server sends outgoing mail using postfix, receives mail using dovecot, and forwards the changed user 1. Install dns domain name resolution service 1.1 Configure the server host name, which is consistent with the sending ...

Posted on Sat, 15 Feb 2020 08:27:43 -0800 by murpe

Overview, data type, data structure, usage scenario of Redis

1. Overview Redis is a very fast, non-relational (NoSQL) memory key-value database that stores mappings between keys and five different types of values. Keys can only be of type string, and values support five data types: string, list, collection, hash, ordered collection. Redis supports many feat ...

Posted on Fri, 07 Feb 2020 19:05:34 -0800 by digibrain

Network probe: Blackbox Exporter

What is a blackbox exporter? Blackbox Exporter is the official black box monitoring solution provided by Prometheus community, which allows users to detect the network through: http\HTTPS\DNS\TCP\ICMP Running blackbox exporter as docker Pull mirror image docker pull prom/blackbox-exporter Check the dockerfile (this is a good habit) $ cat chec ...

Posted on Thu, 06 Feb 2020 01:32:03 -0800 by gapern

Nginx web services (basic theory, operation, access control, nginx virtual host)

Article directory Preface: 1, Nginx service foundation 1.1 overview of nginx 1.2 manual compilation and installation of Nginx 1.3 operation control 2, Nginx access control 2.1 profile introduction 2.2 access status statistics 3, Access control 3.1 install and configure DNS Service 3.2 test DNS r ...

Posted on Thu, 30 Jan 2020 22:43:40 -0800 by chevys

vmware configuration management ubuntu environment

System development in ubuntu environment 1.vmware installation 1.1 network configuration: 2.ubuntu installation 3. Configuration management 3.1 system configuration 3.1.1 /etc/environment 3.1.2 /etc/profile 3.1.3 /etc/hosts 3.1.4 current working user configuration 3.2 network configuration 3.2.1 ...

Posted on Thu, 16 Jan 2020 22:32:48 -0800 by buluk21

linux network interface, ip address, routing settings

This paper is based on centos To configure DNS entries: Configuration file / etc/resolv.conf Modify host name: Command: hostname NAME. Failure after restart Configuration file / etc/sysconfig/network CentOS7 special command: hostnamectl Configure IP address mode: 1. Static designation: Order: ifcfg family: ifconfig: configure IP, NETMASK ...

Posted on Mon, 06 Jan 2020 19:12:26 -0800 by coldkill

FQDN query and setting in Linux

FQDN: (Fully Qualified Domain Name) fully qualified domain name: name with both host name and domain name In fact, it is to mark the complete domain name of a host. For example, if my domain name is ifrom.top, the host name of its mail server is mail, so its FQDN is mail.ifrom.top The command for Linux to get the hostname is: ➜ ~ hostname -f ...

Posted on Sun, 05 Jan 2020 08:16:58 -0800 by possiblyB9

Analysis of OkHttp source code

OkHttp use code instance private static final MediaType JSON = MediaType.parse("application/json; charset=utf-8"); OkHttpClient client = new OkHttpClient(); String post(String url, String json) throws IOException { RequestBody body = RequestBody.create(JSON, json); Request request = new Request.Builder() ...

Posted on Wed, 01 Jan 2020 07:31:32 -0800 by allex01