Programmer Group

User interaction In learning note 04, we mentioned the location parameter, which is a way to pass the parameter to the script. Another way is the read command. [root@c7-server ~]# read name alongdidi [root@c7-server ~]# echo $name alongdidi The read command can read data from STDIN and store it in the variable specified by the user. It can be ...

I. Preface The function of offline map has only been completed recently. Many people have asked if there is any function of offline map for a long time ago. They have also roughly learned how to make offline map before. In fact, the core is not the code, but how to get free offline map files. Most of the offline map downloaders are charged onli ...

Monitoring is very important for operations and maintenance, which can be called the eyes of operations and maintenance personnel.A good monitoring system can help operators quickly find the root cause of the problem, reduce downtime, and improve the speed of troubleshooting.It can be seen from this that, as an operation and maintenance person ...

Maybe everyone will use the libaio interface, but how does it interact with the kernel? What is the mechanism of the kernel? Let's follow the main process together. Entering: system call Dependent header file #include <errno.h> #include <sys/syscall.h> #include <unistd.h> Main functions: /* Actual syscalls */ int io_setup(int ...

1. Preface In the previous chapter, we explained the manual compilation and installation process of MySQL and related database operation commands (sql statements). This article will introduce the concept and principle of MySQL index and transaction in detail, and initially understand the concept of MySQL database view, and briefly describe th ...

I. Installation of NginxOn the basic concepts of Nginx, in previous blogs: https://blog.51cto.com/14227204/2464167With a detailed introduction, this blog post starts directly from the installation. Environmental preparation: Three centos 7.5, one running Nginx and two running simple web services, are designed to test the effectiveness of the ...

On the premise of the implementation of IPv6 in the National Network Telecom Office, IPv6 address configuration is required for the server. The configuration process outlines Ha: #cat ipv6.sh #! /bin/bash Ipv6=$1 Ipv4=$(dig +short $(hostname)) #Used to get the corresponding network card and change it as needed Time=$(date  +%Y%m%d%H%M%S) [[ $ ...

1. Use yum to download the necessary packages in a directory: yum install --downloaddir ./ --downloadonly nvidia-detect 2. Making script files: The script file needs unix format (only 0A line breaks, no 0D carriage return) and cannot be in window format.The last must be the end of 0A."Must be"######## End install.sh"before the ...

The nmcli connection show command enables you to view the identified network card name. [root@localhost ~]# nmcli connection show //Name UUID type device ens33 f45a714b-7ccc-4e58-9f52-e8a6c3027a15 802-3-ethernet ens33 virbr0 32b28b6a-4b00-4e7c-9a41-2217b2c25449 bridge virbr0   The network card configura ...

Question Summary Nginx section Essential Library yum install -y wget vim gcc gcc-c++ zlib-devel pcre-devel openssl-devel Compile Options ./configure --with-http_stub_status_module --prefix=/data/wwwroot/nginx-1.17.1 --user=www --group=www --with-http_ssl_module Matters needing attention To be added start-up .../sbin/nginx Common Errors To be a ...