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  Server monitoring shell scripts

There are many open source server monitoring software such as cacti and nagios. Besides these, can we write our own shell scripts to monitor them? The shell scripts written by ourselves can fulfill our special requirements better and have a more detailed coverage. Below are some commonly used shell scripts used by Evangelist, an Oracle DBA. 1. Check network gateway traffic #!/bin/bash #network #Mike.Xu while : ; do time='date +%m"-"%d" "%k":"%M' day='date +%m"-"%d' rx_before='...

   Server monitor,CPU,memory,shell     2013-08-30 21:56:14

  Android socket programming example

Socket is a kind of interface for different sides t communicate, it usually identified by an IP and a port. There are many server side software on a server and they would provide different service. Each server many create some sockets and bind them to some ports so that clients can listen to. Software on the Internet will exchange data though a bidirectional connection established. Each end of the connection has a socket created. In Java, Socket and ServerSocket are in java.net package, ServerSo...

   Android,Socket,Java     2013-05-11 22:17:16

  OpenLDAP Proxy -- Introduction

OpenLDAP is an open source project which is intended to provide some commercial-grade, fully featured applications and development tools based on the well known Light-weight Directory Access Protocol(LDAP). Hence corporations which want to manage their user and group information can freely use these tools.  OpenLDAP provides ldap servers, ldap clients and corresponding tools to work on LDAP. The LDAP server is called slapd(Stand-alone LDAP  daemon). And it would serve as the server whi...

   META,OPENLDAP,OPENLDAP PROXY,SLAPD,SLAPD.CONF,LDAP     2017-10-28 11:20:00

  Beauty of front end--List of front end tools used by GitHub

I did this summarization when I added Lirate_CoffeeScript support for GitHub-Linguist, i.e how does GitHub do Marjdown render and code highlight in its front end. Lots of font end tools used by GitHub are open sourced. They are: 1. HTML/CSS/JavaScript 1.1 HTML template GitHub markup and template styleguide : https://github.com/styleguide/templates 1.2 Style and CSS GitHub uses replacement of CSS: SCSS：https://github.com/nex3/sass KSS：https://github.com/kneath/kss GitHub CSS styleguide ...

   GitHub, front end,Tool     2013-03-07 03:46:42

  Info -> Design -> Build

First who we are: account managers and business developers at web design agencies. This process is geared towards bigger agencies, however it can be applied to freelance and smaller shops in theory.The important piecesWeb design projects tend to be unique in nature, however it is important to have a basic process that can be applied in most cases. This process is executed in a linear fashion starting with information and ending in code, but requires iteration loops at each step.Information ...

   Webdesign,Content,Info,Design,Build,Process     2011-11-13 08:25:21

  Asynchronous UIs - the future of web user interfaces

It's an interesting time to be working on the frontend now. We have new technologies such as HTML5, CSS3, Canvas and WebGL; all of which greatly increase the possibilities for web application development. The world is our oyster!However, there's also another trend I've noticed. Web developers are still stuck in the request/response mindset. I call it the 'click and wait' approach - where every UI interaction results in a delay before another interaction can be performed. That's the process they'...

   AJAX,Asynchronous UI,AUI,User interface     2011-11-18 08:55:08

  5 Mistakes Developers Should Avoid before Launching Their API

Time is money in the API industry, and everyone wants to be timely for the API’s milestone event: its eventual launch. Delays in this event can be very costly, so the sooner the API can be integrated, the better. Many developers start their work knowing quite well that the clock is ticking. But prioritizing a quick launch—at the cost of everything else—can do a lot of damage in the long run. A rushed launch may result in unstable integration, a host of errors and bugs, lower en...

   TIPS,API DESIGN     2020-05-18 07:08:22

  JavaScript tutorial - Creating time delays

There are two ways of creating time delays with JavaScript. The first is more simple and will simply wait for a specified amount of time before executing a function. The second does the same but will repeatedly execute the function. Note, many browsers have a minimum delay length of between 25 and 75 ms, with some of the fastest browsers having a minimum delay of about 3 ms. If a shorter delay is specified, the actual delay will be the minimum delay length. Even with higher numbers, the delay i...

   JavaScript,Time delay,setTimeout,setInterval     2012-04-13 07:17:46

  Tricks with Direct Memory Access in Java

Java was initially designed as a safe managed environment. Nevertheless, Java HotSpot VM contains a “backdoor” that provides a number of low-level operations to manipulate memory and threads directly. This backdoor – sun.misc.Unsafe â€“ is widely used by JDK itself in packages like java.nio or java.util.concurrent. It is hard to imagine a Java developer that uses this backdoor in any regular development because this API is extremely dangerous...

   Java,Directly memory access,Tricks,JVM     2012-02-13 05:31:19

  10 tools to make your shell script more powerful

Many people mistakenly think that shell scripts can only be run in command line. In fact shell can also call some GUI components such as menus,alert dialogs, progress bar etc. You can control the final output, cursor position and various output effects. Here we introduce some tools which can help you create powerful, interactive and user friendly Unix/Linux shell scripts. 1. notify-send This command can let you inform the process to send a desktop notification to users. This can be used to send ...

   shell,GUI,zenity     2013-04-05 08:50:41

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