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Common modules of Ansible Ansible provides many modules for us by default. In Linux, we can view all modules currently supported by ansible through the ansible doc - L command, view the parameters in the help document through the ansible doc - S module name, and execute the command through the ansible managed host - m module name - a 'paramete ...

Linux source code can go here https://mirrors.edge.kernel.org/pub/linux/kernel/ Download. This article is based on linux-2.6.34. The code of the old version is simpler and easier to understand. Little friends who have learned Linux system programming should know that the entry functions of Linux system calls in the kernel are sys_xxx, ...

Preparations: Tencent cloud configuration (at present, individuals can apply for 6-month free file storage server), centos 7, dokcer on centos, Git on centos Tencent cloud configuration: accessKey, secretKey, bucketName, regionName centos: Git installation (pull cosfs source code) Operation on Cos The cos cloud storage bucket creates a new ...

1. Scenario requirements Scenario: if there is only a temporary command that needs to run for a long time, what is the easiest way to ensure its stable operation in the background? The origin of hangup name in the early versions of Unix, each terminal would communicate with the system through modem. When the user logs out, the modem will ...

Process text files for text analysis REFERENCE: https://www.cnblogs.com/ginvip/p/6352157.htmlhttps://www.runoob.com/linux/linux-comm-awk.html The Syntax of awk awk [Option parameters] 'script' var=value file(s) or awk [Option parameters] -f scriptfile var=value file(s) Option parameters -F fs | --fiel-separator fs Specify the input f ...

Principle and implementation of thread pool 1. What is a thread pool Thread pool is a form of multi-threaded processing. Threads are created in advance and placed in a queue for management. When a task needs to be processed, the task is assigned to a specific thread for execution. Improve performance by reducing thread creation, destruction, ...

reference material Video link Operating environment windows10Linux CentOS 7Xshell 7 1, Process control 1.1 if judgment Basic grammar #Writing method I if [ Conditional judgment ]; then program fi #Writing method 2 if [ Conditional judgment] then program fi Precautions: (1) [conditional judgment], there must be a space ...

This section describes how dtb is converted to device node device_node. In fact, each device node is a structure. Reserve the memory space where the dtb is located Before explaining the device node, let's think about a problem. Q: we put dtb files in a certain part of memory through uboot. Don't we have to worry about this memory being used ...

The day before yesterday, I saw a reader sharing several Shell script example topics in the group. I simply saw them. Why not write and consolidate the basic knowledge, as follows: 1. Concurrently obtain the hostname from several machines, record the time spent returning the information, and redirect to a file hostname Txt, output the CPU info ...

Linux text three swordsmen – grep, sed, awk The three functions are all text processing, but the emphasis is different, among which awk is the most powerful and complex. grep is more suitable for finding or matching text in a single flush, sed is more suitable for editing the matched text, and awk is more suitable for formatting text ...