HttpClient/HttpURLConnection + HttpDns Best Practices

On the Android side, if OkHttp serves as a network request framework, it can gracefully integrate HttpDns because it provides a custom DNS service interface. The related implementations can be referred to: HttpDns+OkHttp Best Practices. If you use HttpClient or HttpURLConnection to initiate network requests, although you cannot directly cust ...

Posted on Sat, 06 Jul 2019 12:15:47 -0700 by andrew_U

Operations and Maintenance Basic Command

1. View the current operating system version [root@root ~]# cat /etc/redhat-release CentOS release 6.5 (Final) 2. View the number of bits in the operating system (kernel) [root@root ~]# uname -r 2.6.32-431.el6.x86_64 3. View the running level of the current system [root@root ~]# runlevel N 3 4. Setting Linux boot level 5. Temporary modificatio ...

Posted on Tue, 02 Jul 2019 14:45:30 -0700 by Cbrams

Configuring e-mail transmission under linux (1)

Basic E-mail Sending 1. Email Sending The server submits e-mail to TCP port 25 using SMTP protocol, or the local client submits it through / usr/bin/sendmail program. If the MTA is the final destination, the mail will be delivered to the MDA. Otherwise, MX records will be used to find the next MTA in DNS and forward using SMTP. MDA: Mail De ...

Posted on Fri, 28 Jun 2019 13:29:12 -0700 by Donnamabob

DNS Fast Configuration Experiment

DNS Fast Configuration ExperimentDNS Fast Configuration Experiment:The implementation of DNS program under Linux is bind.x86_64. It is noteworthy that the running program is/usr/sbin/named. The dig tool for testing DNS needs to install bind-utils.x86_64 package.Forward analysis:Main DNS server ip address: 172.16.252.87From DNS Server 1 ip addre ...

Posted on Wed, 26 Jun 2019 16:12:59 -0700 by 244863

Linux System Management Fifth Week Job [Linux Micro Job]

1. Describe the functions, usage scenarios and differences of bridges, hubs, Layer 2 switches, Layer 3 switches and routers.Network Bridge: Working in the second layer of data link layer of OSI model, it is mainly used to connect two local area networks (LAN) and forward frames according to MAC address. It can effectively connect two local area ...

Posted on Mon, 24 Jun 2019 13:56:46 -0700 by zonkd

Lightweight DNS Server--DNSmasq

Introduction:    Dnsmasq is a lightweight DNS server. It is also an open source project with simple and fast configuration. Dnsmasq provides DNS caching and DHCP services. As a domain name resolution server (DNS), dnsmasq can cache DNS requests to improve the connection speed of visited Web sites. As a DHCP server, dnsmasq c ...

Posted on Sun, 16 Jun 2019 10:57:19 -0700 by stebbi

PXE KICKSTART Automatic Installation System

I. PXE PXE(Pre-boot Execution Environment, Pre-boot Execution Environment) In the Client/Server network mode, the image is downloaded from the remote server through the network, and the operating system is started through the network. During startup, the terminal requests the dhcp server to assign IP address, and then downloads a startup pac ...

Posted on Sat, 15 Jun 2019 11:57:11 -0700 by alex_bg

Security Situation, Interactive Discovery-Based on Aliyun Easy Building Security Screen

In 2017, Aliyun launched MVP(Most Valuable Professional) Project. As its name implies, MVP is looking for Aliyun's most valuable experts, opinion leaders who can and are willing to help others, fully understand and use Aliyun technology. This article is about Aliyun MVP Fu Kui Practice sharing, today we will talk about "security situation, ...

Posted on Mon, 10 Jun 2019 15:08:33 -0700 by willythemax

Kubernetes deployment: managed Helm and Rancher deployments

Helm deployment helm official download address: https://github.com/helm/helm/releases Official list of chart s available: https://hub.kubeapps.com All software and configuration files are stored on the Baidu disks mentioned in the previous article: Baidu Shared Links in this article helm introduction Helm is a tool to simplify the installati ...

Posted on Thu, 16 May 2019 19:50:44 -0700 by aspekt9

DNS Server Installation of CentOS-yellowcong

Yesterday, a brother came to me to study DNS server and promised him to write an example about the construction of DNS service. This DNS server is based on bind. This thing is configuring name server on linux server, so that it can't be done immediately on the configuration of server DNS on window s system. It will take a while to do so, bu ...

Posted on Wed, 15 May 2019 22:58:49 -0700 by PigsHidePies