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2.4.2 date & time component (I) Introduction to this section: This section brings you several controls for displaying time provided by Android. They are TextClock, AnalogClock and chrome. In addition, there is an outdated digital clock, so I won't explain it! OK, let's start this section! 1. Textclock TextClock is a control intro ...

catalogue Disk performance index Attention Usage scenario Performance testing tool fio Disk I/O observation Interpretation of iostat index ​ Process I/O observation pidstat iotop Question How to determine whether it is random io or sequential io? Disk performance index Utilization, saturation, IOPS, throughput, response time, etc ...

Why use coprocessing? We usually use multithreading or multiprocessing for concurrent programming in Python. For computational tasks, we usually use multiprocessing due to the existence of GIL, while for IO tasks, we can use thread scheduling to make the line give up GIL when executing IO tasks, so as to achieve apparent concurrency. Coprocess ...

Install MySQL 5 in Centos7 system 7(RPM) In work, the actual production environment is generally not connected to the Internet, so MySQL is installed offline. Obviously, yum installation is not appropriate. Because Yum installation needs to be connected to the network, this article introduces the offline installation of MySQL 1. Unin ...

Write in front This article is for reference, thanks for the original: https://blog.csdn.net/weixin_45606067/article/details/109962484 https://blog.csdn.net/secyb/article/details/78697976 https://blog.csdn.net/smart9527_zc/article/details/85174102 https://blog.csdn.net/weixin_45842014/article/details/108779004 https://blog.csdn.net/zqwzlan ...

1, Foreword 1. What is RestFul? REST: representational state transfer. If an architecture conforms to the REST principle, it is called RESTful architecture style. Resource: the so-called "resource" is an entity on the network, or a specific information on the network. Presentation layer: the form in which we present "r ...

Target address: https://www.vulnhub.com/entry/goldeneye-1,240/ Goal: get root & find flag txt Author: ned Hogg 007 Time: July 7, 2021 1, Information collection Open kali virtual machine and target machine Golden Eye-v1, and both virtual machine networks are in NAT mode kali, check the local IP segment. Mine is 192.168.21.0/24 nma ...

1. Configure YUM source 1.1 download mysql source installation package [root@chris /]# wget http://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm 1.2 installing mysql source [root@chris /]# yum localinstall mysql57-community-release-el7-11.noarch.rpm 1.3 check whether the mysql source is successfully installed [root@chris ...

catalogue Installation steps configuration parameter Nginx common commands Nginx as a system service script After adjusting the script according to your actual situation, copy it to the specified directory Abnormal problem env: /etc/init.d/nginx: there is no such file or directory PID file /var/run/nginx.pid not readable (yet?) after ...

Ten classical sorting algorithms and their optimization Algorithm overview 0.1 algorithm classification Ten common sorting algorithms can be divided into two categories: Nonlinear time comparison sort: The relative order between elements is determined by comparison. Because its time complexity can not exceed O(nlogn), it is called nonline ...