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k8s environment construction Create three virtual machines to ensure that the private network uses the same network card on the same network segment Kubedm create cluster Preparation environment (machine execution) Install docker # ( sudo yum -y install docker-ce-20.10.7 docker-ce-cli-20.10.7 containerd.io-1.4.6 ) # Set docker to start ...

How to get a core dump of a segment error on Linux What is a segment error? Segment fault refers to a situation in which your program attempts to access memory addresses that are not allowed. This may be due to: Attempt to dereference null pointer (you are not allowed to access memory address 0);Try to unquote other pointers that are not ...

Install Docker Install Docker Compose (this is required for the operation of a complete project) This document mainly records the process of learning to deploy Docker. The article is followed by the deployment of open source projects based on Docker and Docker Compose. It's never too old to learn, keep an empty cup mentality, learn knowledg ...

Based on CentOS, this paper deeply explains the process concept, PCB, process creation, process status, zombie process and orphan process by von Neumann system and operating system concept. catalogue 1, Von Neumann system 2, Operating system   3, Basic concepts of process 4, Description process - PCB 1.task_ struct 5, Organizational ...

Shared memory: Normally, after the two processes are born by their father, even if they are brothers, their two memories are independent. If the agreement is made in advance: there is a space in memory where brothers can get data in the future. (Critical Zone) In addition to the fact that the parent process can create shared memory for the chil ...

4.4. Create logical volumes using lvcreate Volume group is the core of LVM architecture, which is similar to disk partition in non LVM system. Logical volume is the final object we use. The command used to create logical volume in volume group is lvcreate. In fact, LVM has two modes: non Thin mode and Thin mode. In non Thin mode, the basic com ...

Lock: it is placed around the critical area to ensure that the critical area is executed like a single atomic instruction. The lock makes the chaotic state originally scheduled by the OS controllable. Implementation of lock Discuss the goal that should be set before implementation, so how to evaluate the effect of a lock implementation? T ...

Red hat RHCE exam am - RHCSA (RH134) serverb.example.com task 17. Set the expiration time of new user password Task requirements When creating a new user, the default password policy is set to expire after 20 days. Complete step Find login file cat /etc/login.defsAdjust the password expiration time in about 25 lines. The default is 99999 ...

1. Install and prepare a virtual machine (vmware, VirtualBox). 2. Use the connection tool to connect (Xshell, electerm and other tools, the electerm tool I use). use ip address or ip addr To view the virtual machine address. If you are using a local area network, you need to set a bridging network and copy the physical address. If it is ...

shell script 1, What is a shell Shell is a program written in C language. It is a bridge between users and linux kernel. It is not only a command language, but also an interpretative programming language. Use a chart to see what the shell does **Expand knowledge:** **kernel: Serve the software, receive user or software instructions, drive ...