Programmer Think

1. Linux Foundation 1.1 User Type root user A special administrative account Also known as superuser root is close to full system control Almost unlimited capacity for system damage Do not log on as root unless necessaryNormal (Unprivileged) User Limited permissions Limited capacity to cause damage 1.2 terminal Device terminal: keyboar ...

Management Logical Volume Management LVM Concepts When we partition, format and mount partitions on regular hard disks, we find that there is not enough disk space or that the disk allocation is too large. If you need to re-plan your hard drive, you need to re-format your hard drive drive. Of course, you will not have any data on your hard dri ...

Recently, I started envoy proxy, pulled the envoyproxy/envoy:latest image, and conducted a local test. However, when the proxy failed, I recorded the whole process. Configure agent Refer to envoyproxy official Front end agent sample configuration As a blueprint, it has changed to its own configuration. The contents are as follows: static_res ...

1. DockerMaven plug-in Microservice deployment method: Manual deployment: package and generate jar s based on the source code and upload them to the server.Automatic deployment through Maven plug-in. 1.1 automatic deployment steps of Maven plug-in: Modify the docker configuration of the host so that it can be accessed remotely. Add - h ...

pod troubleshooting of k8s operation and maintenance K8S is an open source application for managing container applications on multiple hosts in the cloud platform. Kubernetes aims to make deploying container applications simple and efficient K8S Core advantages of: 1，be based on yaml The file realizes the automatic creation and deletion of ...

1. Disk structure 1.1 equipment documents Everything is a file: open(), read(), write(), close() Device file: associated with a device driver, which can communicate with the corresponding hardware device Equipment number: Main equipment number: major number, which identifies the equipment typeSecondary equipment number: minor number, which ...

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1._Filter One of the three major components of Java Web (Servlet, Filter and Listener); Similar to Servlet, it is used to intercept requests, not to process requests; Web developers use Filter technology to intercept all web resources managed by the web server, such as Jsp, Servlet, static picture file or static html file, so as to realize so ...

In jdk 1. * version, the main containers are vector (implementing List interface) and hashtable (implementing Map interface). With the evolution of jdk version, in order to deal with transactions in high concurrency environment, jdk later added some containers suitable for high concurrency; Now let's follow the footsteps of history to explo ...

1, Download from the official website Official download address This time, the current new release version is selected: 4.9.2. Download the binary version of the compressed package. Or directly Click download In Linux environment, use the following command to download: wget https://dlcdn.apache.org/rocketmq/4.9.2/rocketmq-all-4.9. ...