003_ File operation of Linux common commands

1. File operation touch command Create a file. If the file name does not exist, create it directly. If it exists, change the access time touch [option] filename1 filename2... root@ubuntu:~/Test# touch hello.c root@ubuntu:~/Test# ls hello.c rm command: delete file or directory Parameter - r recursively delete subdirectories rm -rf * del ...

Added by evo4ever on Mon, 29 Jun 2020 11:43:38 +0300

[big data application technology] task 8: reptile integrated task

All requirements of this time come from: https://edu.cnblogs.com/campus/gzcc/GZCC-16SE2/homework/3075 preface This job is to crawl the information about python's relevant positions on the pull hook network. Through crawling the data such as position id, city, full name of the company, welfare treatment, work place, education requirements, wor ...

Added by jblallement on Sat, 27 Jun 2020 09:09:45 +0300

pxe+kickstart+dhcp+tftp+httpd to realize unattended installation of CentOS7 system

Article catalog 1, Introduction 1. What is PXE 2. Working process of PXE 2, Realize network manual installation 1. System environment preparation 2. Install and configure dhcp service 3. Install and configure tftp service 4. Install and configure httpd service 5. Configure PXE boot program (1) PX ...

Added by webweever on Fri, 26 Jun 2020 09:39:26 +0300

C programming under Linux: TCP/IP network communication

Today, I will talk about Socket communication under Linux, including client and server. Customer service terminal The idea of connecting the client to the server is as follows:1. Establish Socket link, 2. Set the communication mode, IP and port of the server, and specifically set sockaddr_in, the ...

Added by lemonpiesaregood on Wed, 24 Jun 2020 10:11:07 +0300

Detailed explanation of Docker Dockerfile instructions and practical cases

Dockerfile introduces and commonly used instructions, including FROM, RUN, COPY, ADD, EXPOSE, WORKDIR, etc. in fact, dockerfile has powerful functions and provides more than ten instructions.   About Dockerfile Dockerfile is a text file used to build an image. The text content contains instructions and instructions required to build an image. ...

Added by programguru on Sun, 21 Jun 2020 11:49:45 +0300

[basic], [v], [supplement] c + + learning diary

C + + learning diary Double colon scope operator Namespace namespace Using declaration and using compilation instructions The enhancement of c + + to c Memory allocation of const The difference between const and define Inline function extern explicit Singleton mode Up down type conversion Type conver ...

Added by ghazianibros on Sun, 21 Jun 2020 06:30:36 +0300

Packaging Helm diagrams using Operator technology and deploying them to K8S clusters

Preface In " Packaging and deploying complex applications to the k8s cluster using helm "In this article, we package the application as a chart with helm, which simplifies the deployment process. However, while helm supports Seamless Upgrades for Stateless Applications on the line of Basic Install, replacing the mirrored version to ta ...

Added by kevin_newbie on Fri, 19 Jun 2020 19:26:51 +0300

Ceph use series -- Ceph RGW use

The theme of this article is "Ceph use series - Ceph RGW use", welcome to pay attention. Ceph RGW introduction Ceph object gateway is an object storage interface built on librados, which aims to provide a RESTful gateway to Ceph storage cluster for applications. Ceph object storage uses t ...

Added by isuckat_php on Fri, 19 Jun 2020 11:32:47 +0300

002.OpenShift installation and deployment

I. description of preconditions 1.1 overview of installation preparation Red Hat OpenShift container platform is composed of Red Hat as RPM package and container image. The RPM package is downloaded from the standard Red Hat repository (Yum repository) using the subscription manager, and the container image is from the Red Hat private reposit ...

Added by jcantrell on Fri, 19 Jun 2020 06:48:12 +0300

Speech location based on ROS + speaker mic array v2.0

** 0. Preface ** Some time ago, I participated in a competition and needed to complete the voice positioning function of ROS robot, but for various reasons, I failed to complete this function. Now I will sort out the overall idea as follows. ** 1. Hardware introduction **First of all, the purpose of ...

Added by brianjw on Fri, 19 Jun 2020 05:54:34 +0300