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How to check a port is taken by which program on Linux
Lots of you may have encountered some error message stating that the port has been taken by another program while trying to start a program on Linux. And you would want to know which program takes the port you want to use. This post will provide some feasible ways to check out which program is taking a specific port. lsof -i:[port] lsof is the command to list open files on Linux. And if you know more about Linux you should get to know everything on Linux is a file even including networ...
IBM acquires Ustream to propel its cloud business
On January 21, 2016, IBM acquired Ustream, a leading live and on-demand video solution company, to propel its cloud service business. This acquisition will make IBM capable of providing enterprise live video stream service to the world. With this, a new member joining the IBM cloud service family. Ustream provides cloud-based video streaming to enterprises and broadcasters for everything from corporate keynotes to live music concerts. The company streams live and on-demand video to about 80 mil...
Go是一门面向对象的编程语言吗
Golang已经开源了13年，在最近的TIOBE编程语言排名中，于2023年3月再次进入前十名，并比2022年底的排名上升了两个位置。 Go在2022年底提高了2个排名 许多第一次接触Go的开发者来自面向对象的编程语言，比如Java、Ruby等，他们在学习Go后第一个问题通常是：Go是一种面向对象的语言吗？在本文中，我们将探讨这个问题。 追溯 在广为人知的Go编程语言“圣经”《The Go Programming ...
Fix SSL 'alert protocol version' issue while git clone remote repository
Git provides ways to securely connect to remote repository and clone remote repository to local machine. This post will teach you how to fix the "SSL23_GET_SERVER_HELLO:tlsv1 alert protocol version" issue while cloning a remote repository. The issue would look like: If this error occurs, it is most probably caused by out of date git version being used.To improve its security awareness, some weak cryptographic algorithms have been disabled and all git clients should upgrade to latest ones to acc...
GIT,GIT CLONE,GIT SECURITY 2018-07-08 05:41:39
Privileged users get removed from database in GoDaddy shared hosting
GaDaddy is a famous web hosting platform where many people put their websites on its platform. If one has low budget and wanna a shared hosting, you can buy the service at GoDaddy and share some hosting resource with others. In such cases, there would be resource limit based on different plans. In this post, we will discuss one scenario which caused our application down caused by database usage on shared hosting plan and hope it helps readers who encounter similar issues. The issue we encounter...
CPANEL,DATABASE,GODADDY,PRIVILEGED USER 2021-05-25 23:06:50
Install and configure git plugin in Eclipse
When developing using IDE, it's always a good experience if everything can be done in the IDE including development, testing and version control. This also applies to Eclipse. In this post, we will show the process of installing and configuring git plugin in Eclipse. The pre-requisite is that you have git installed on your local machine. The detailed steps for installing and configuring git plugin are below. 1. Installing Git plugin Install using "Install New Software..." menu. ...
ECLIPSE,GITHUB,GIT PLUGIN 2018-10-13 04:22:06
Install and enable redis extension in PHP 5.X on Windows
Redis is frequently used as a caching layer for web applications to improve its performance. In PHP 5.x, if one wants to use Redis, the redis extension needs to be installed and enabled first. This post will show how to install and enable redis extension on Windows with PHP 5.X. Basically there are two dlls to be downloaded: php_redis.dll and php_igbinary.dll. Below are detailed steps Go to http://windows.php.net/downloads/pecl/releases/redis/2.2.7/ and find the respective php_redis zip ma...
Why (offset, limit) is slow in database select?
Starting from a problem Five years ago when I was working at Tencent, I found that MySQL request speed was very slow in the pagination scenario. With only 100,000 data, a select query on a single machine took about 2-3 seconds. I asked my mentor why, and he asked in return, "In an indexing scenario, what is the time complexity to get the nth largest number in MySQL?" The pursuit of the answer Confirming the scenario Assuming there is an index on the "status" column, a query like "select * from t...
How to check when an API is introduced in GoLang
Normally people would not pay much attention to which GoLang version is being used as lots of functions are backward compatible. However there are cases where GoLang version does matter as some functions may not be supported by old version of GoLang. For example, strings.Builder is introduced in Go 1.10, but below code would fail to be compiled on Go 1.10. package main import ( "fmt" "strings" ) func main() { var b strings.Builder b.WriteString("polarisxu") fmt.Println(b.Cap()) } The ...
GOLANG,API VERSION,GO TOOL 2021-02-07 00:43:24
Baidu is in a deadly crisis
In past few days, there was some news about Baidu(China's Google) which put this search engine giant in China in a devastating position. The news is about that the owners of a Tieba(Similar to Google Group) were replaced by a sponsored organization without notifying the original owners. This irritated the original owners of the Tieba and also the public. People are complaining that Baidu is doing something ridiculous and evil. The name of the Tieba group which was sold by Ba...
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