Programming VIP

background Deploy a set of devops platform with open source software container on raspberry PI4B, which can be used for normal R & D activities such as code management, warehouse management, project management, CICD and so on. prepare Hardware: Raspberry Pi 4B (8g version) OS: centos7.9 Basic environment: 19.03.8 IP: 10.0.1.155 ...

Preface: The nature and working mode of library files in both Linux and Windows are the same, except that the corresponding file formats and file suffixes for libraries on different platforms are different. The library called in the program is a static library. There are two purposes to use libraries in a project. One is to make the program si ...

1.awk working principle and basic usage awk : Aho, Weinberger, Kernighan , report generator, formatted text output, GNU/Linux Published AWK is currently funded by the free software foundation( FSF )Development and maintenance, commonly known as GNU AWK There are several versions: AWK: AWK originally from at & T ...

Day6 - understanding and learning BASH 0X01 BASH Foundation 1. shell built-in properties Gets the length of the string length=${#Var} can get the length of var Gets the shell currently in use $BASH $0 Check current running user if [ $UID -ne 0 ] then echo NOT ROOT USER. Please run as root else echo Root User fi perhaps if test $UID - ...

POSIX semaphore 1. Basic concepts The logic of POSIX semaphore is exactly the same as that of semaphore elements in IPC semaphore group, but the operation of POSIX semaphore is simpler and the interface is easier to use. It is widely used in multi process and multi thread. POSIX semaphores are divided into two types: POSIX anonymous sema ...

target Through practice, learn the basic writing method of bat file. Main reference tutorials: http://www.trytoprogram.com/batch-file/ https://www.tutorialspoint.com/batch_script/index.htm 0. First bat file Open a text editor and enter the following text: @echo off echo Hello bat pause Save it as a suffix bat file. Just double click the ...

Previous address: Operating system series - operating system overviewOperating system Series II - processOperating system series 3 -- compilation and link relationshipOperating system series 4 - stack and function call relationship Theme of this issue: Detailed explanation of target file 1. Definition and classification of target doc ...

preface Summarize some commands commonly used at ordinary times, not detailed explanations of commands, but continuous updates 1.nc command nc is short for netcat yum -y insatll nc function (1)Network port connectivity nc -vz -w 1 192.168.1.129 3306 Centos6 nc -w 1 192.168.1.129 3306 </dev/null ...

2021SC@SDUSC Shell Shell is a program, which can be called shell program, which is used for users to interact with the operating system. It is used to distinguish between and core, which is equivalent to a command parser. There are many shells, and several of them are listed here Bourne SHell(sh) Bourne Again SHell(bash) C SHell(csh) Korn ...

1, Foreword After the basic study of the previous three sections, we are finally going to enter the door of the shell. As a back-end developer, you don't have to be proficient in shell script development, but you need to master some shell programming skills. After all, shell script, as a lightweight scripting language, can help us complete ...