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Catalog New user Authorization for new users Method 1: Add a new user to the wheel user group Method 2: Add new users to sudoers list New user enabled SSH key login Other Prohibit root users from using SSH to log in Using unconventional SSH ports Prohibit ping ...

YUM overview YUM Software Update Mechanism Based on RPM Package Construction Automatically resolving dependencies All packages are provided by a centralized YUM software repository The Way of Providing Software Warehouse FTP service: ftp://... HTTP service: http://... Local directory: file://... Sources of RPM Packages Collection of RPM Packet ...

About Docker Swarm Docker Swarm consists of two parts: Docker Cluster: Organize one or more Docker nodes so that users can manage them in a cluster; Application orchestration: There is a set of API s for deploying and managing containers; Official information: https://docs.docker.com/swarm/ network diagram The following is a typical Docker Sw ...

CentOS 7 System Service Control In CentOS system, the control scripts of various system services are placed in the directory of / usr / lib / system by default. The system CTL command tool can control the specified system services. System CTL command Common formats System CTL [control type] [service name] control type start: Run the spec ...

System boot is the beginning of the operation of an operating system. If there is a problem in boot, the system will not work properly. Is there any way to repair it? The answer is yes. CentOS 7 boot process 1. Boot-up self-check BIOS 2.MBR boot 3.GRUB menu 4. Loading kernel and memory file system initramfs 5. Loading hardware driver and init ...

RAID can greatly improve disk performance and reliability. How can such a good technology not be mastered? This article introduces some common RAID and its soft RAID creation methods on Linux. mdadm Creating Soft RAID Mdadm-C-v/dev/Created device name-l level-n number added disk [-x number added hot backup disk] - C: Create a new array -- ...

Environmental description: host name Operating System Version ip docker version kubelet version To configure Remarks master Centos 7.6.1810 172.27.9.131 Docker 18.09.6 V1.14.2 2C2G Remarks node01 Centos 7.6.1810 172.27.9.135 Docker 18.09.6 V1.14.2 2C2G Remarks node02 Centos 7.6.1810 172.27.9.136 Docker 18.09.6 V1.14.2 2C2G Remarks ...

This article has been added to the Index of.NET Core on K8S Learning Practice Series Articles , you can click to see more articles related to container technology. 1. About Dockerfile The most common way to create mirrors in a Docker is to use a Dockerfile.Dockerfile is a description file of a Docker image, which we can understand as A, B, C, D ...

Environmental Science: 202.106.0.17: as Client 202.106.0.27: as router 192.168.205.37: as lvs1 192.168.205.47: as lvs2 192.168.205.57: as websrv1 192.168.205.67: as websrv2 192.168.205.77: as websrv3 192.168.205.87: as websrv4 Note: Firealld is disabled by default for all operating systems, IPtable is empty, selinux is closed Edition: O ...

Environmental Science: 192.168.205.17: as master server 192.168.205.27: as slave server 192.168.205.37: as slave server Edition: OS: centos 7 1810 with mini install mariadb-5.5.60 Purpose: By default, the replication function of MySQL is asynchronous. Asynchronous replication can provide the best performance. The main library sends the ...