Programmer Think

1. What is the Pod lifecycle The Pod can contain multiple containers, and the Pod can also have one or more init containers started before the application container. The init container is not different from the ordinary container. The main reason is that init runs first. The main container will not be started until init runs successfully. Ther ...

In front, we all write our own LED lamp drivers. In fact, for very basic device drivers such as LED lamps, the Linux kernel has been integrated. The LED driver of Linux kernel adopts platform framework, Therefore, we only need to add corresponding LED nodes in the device tree file as required, 1, linux kernel comes with LED driver enable ...

RH358 configuring e-mail transmission – automated Postfix configuration Use Ansible to configure the SMTP of the Postfix system role. Are the superposition of commonly used modules. RH358 column address: https://blog.csdn.net/qq_41765918/category_11532281.html 1. Configure SMTP with Postfix system role The RHEL system roles ...

Linux System Engineer The system used in the experiment is redhat-rhel8 2. Linux system management - Apache management and optimization 1, Function and installation of Apache Web Server software stay web Commonly used when accessed http: //The way http: // ##Hypertext Transfer Protocol dnf install httpd.x86_64 -y 2, Enabling Apache ...

Why introduce users and groups? Security - permission management (which files can be read and written by a user and which processes can be started by a user) - Resource Management (storage resources, IO, CPU resources) [root@localhost ~]# id root uid=0(root) gid=0(root) group=0(root) Each user has a unique uid and gid A user can have differen ...

Always curious, how does the operating system work? We know how normal programming makes the code run, but those are high-level things. Later on, you will feel like a castle in the air, or someone has paved a lot of truth for you, but you know nothing about it.   1. Confusion of operating system Of course, I don't really know anything. Because ...

1 install two slaver s 1.1 server configuration java37master:1G java37slaver1:512M java37slaver2:512M 1.2 creating virtual machines Set the memory to 512M Set up network Set the host name and apply: java37slaver1+java37slaver2 Set encoding set Set sheet number password Note: if an error occurs: unable to get the version of the VMCI ...

1. Comprehensive exercise (automatic deployment of Web cluster) 1.1 problems Evening self-study extracurricular comprehensive exercises, create a role called cluster and complete a comprehensive project. The specific requirements are as follows: Create Role and complete the project through RoleDeploy Nginx schedulerDeploy 2 http server ...

1, View process 1.1 relationship between procedure and process program 1. Executable code and data stored in hard disk, disk closing and other media 2. Statically saved code 3. Binary file, static process 1. Program code running in CPU and memory 2. Dynamically executed code 3. Parent and child processes (each program can create o ...

Preface _This paper simply records the knowledge about Shell scripting. Original video directions:     Original video Click here 1. Shell Variables (1) Definition: Variable name = variable value A=hello # Define variable A whose value is hello echo $A # Call the variable, note the money, "$" Be careful: Call another ...