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Linux operating system boot process Overview of the boot process 1. Post After the server host is powered on, the CPU, memory, graphics card, keyboard and other devices will be preliminarily tested according to the settings in the BIOS of the motherboard. After the test is successful, the system control will be handed over according to t ...

preparation Intranet environment deployment project, the configuration environment is cumbersome. Use the docker import / export image and container function to create and export the project environment on the networked server, and then import it directly on the intranet server. Offline installation 1. Download docker installation package Do ...

Let's start with chestnuts, a pile of candy. We want to classify them by color We also seem to find some maximum, minimum and average values (Note: aggregation can be nested) Hot and cold cluster architecture elastic nodes support specified types, such as specifying which nodes are hot nodes and which are cold nodes. There are two configurat ...

Docker Basic composition of Docker Docker installation uname -r view system kernel Cat / etc / OS release to view the system configuration [root@palmer docker]# cat /etc/os-release NAME="CentOS Linux" VERSION="7 (Core)" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="7" PRETTY_NAME="CentOS Linux 7 (Core)" ANSI_COLOR="0;31" CPE_NAME="cpe:/o ...

1. Introduction The tput command initializes and operates your terminal session through the terminfo database. Using tput, you can change several terminal functions, such as moving or changing the cursor, changing text properties, and clearing specific areas of the terminal screen. Like most commands in UNIX, the tput command can be used ...

Guide map of this section: https://www.processon.com/view/link/5fcc5e81f346fb3fc8776929 1. 1. ndarray object 1.1 why ndarray list problem The element of Python list can be any object, and the pointer of the object is saved in the list. For example, storing [1, 2, 3] requires three pointers and three integer objects, which wastes memory ...

We use string comparison to demonstrate the difference between = = and equals: First, clarify three points: 1. = = compares whether two references point to the same object. 2. The equals method of String class in Java has been rewritten. It compares whether the contents of two strings are equal. The 3.equals method is as like ...

When testing http services, you usually use curl to send http requests to the server. Curl will simulate the browser's request and help you establish a tls/ssl connection with the server. Sometimes we want to get the time-consuming in the request process to optimize the client experience. At this time, we usually use the - w parameter of curl. ...

1. Demand The project shall be packaged to meet the following requirements: 1. Make a Zip package for the whole project, including the application, the jar package that the application depends on, and the documentation 2. The jar package of the project can execute the Main function in different classes 3. The jar package of the project source ...

1. Prometheus storage bottleneck It can be seen from the architecture diagram of prometheus that prometheus provides local storage, that is, tsdb timing database. Advantages of local storage Using local storage can reduce the complexity of Prometheus deployment and management, and reduce the complexity caused by high availability (HA). ...