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Basic articleQuery time, friendly hint $sql = "Select Date_format (create_time, '%y-%m-%d ') as day from table_name";//int timestamp type $sql = "Select From_unix Time (Create_time, '%y-%m-%d ') as day from table_name ";//A SQL returns multiple

Unix Command Line Tricks–part Ihttp://www.cyberciti.biz/open-source/command-line-hacks/20-unix-command-line-tricks-part-i/Deleting a HUGE fileI had a huge log file 200GB I need to delete on a production Web server. My rm and LS command was crashed

Let's start a new year with these unix/linux command techniques to improve productivity at the end. I've been looking for it for a long time and I'm going to share it with you now. >/path/to/file.log # or use the following format :

On PHP and. Net which are more promising On PHP and. Net which are more promising April 10, 2011 In the long term, or PHP, at present more than 90% of the large-scale portal stations are using PHP development (such as: Sina, Baidu, Huajun, Xinhua,

First, the general settings1, $wgMetaNamespace the name of the meta-namespace used.2, $wgMetaNamespaceTalk meta-namespace The name of the discussion page. It is not usually necessary to consider the variable, but also to write: $wgMetaNamespace.

Redis data persistence, redis dataIn general, there are two persistence solutions: RDB and AOF.The RDB method creates a time point-based snapshot for the dataset at a certain interval.The AOF method records the write operations received by the

Yii2 advance Installation, yii2advance Reprinted from: http://www.genshuixue.com/i-cxy/p/7986531 1. Prerequisites: the php version must be later than 5.4.D: \ phpStudy> php-v PHP 5.5.17 (cli) (built: Sep 16 2014 16:17:50) Copyright (c) 1997-2014 The

Redis is a memory database in which all of its data is stored in memory and then periodically asynchronously saved to disk (this is known as "semi-persistent mode"), and each data change can be written to a append only File (AOF) ( This is called

These tags tell the preprocessor that they contain code and should handle them. Very similar to CGI, the code runs on the server and returns some content that appears as part of the appearance of the resulting HTML page sent back to the browser.

--------------------------------------System Management-------------------------------------Uname-aHostname Host NameHostnamectlCat/etc/redhat-release #查看系统版本Timedatectl #查看日期时间Timedatectl List-timezones # List all time zonesTimedatectl