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Created by voodoo on December 08, 2011 14:32:06
Last update: December 08, 2011 14:32:06
Use the read command to pause a shell script and give the user a chance to stop it:
#!/bin/sh
echo "Press CTRL-C to stop this scrip...
Created by Fang on November 12, 2011 21:03:03
Last update: November 12, 2011 21:03:03
Experts may disagree but I found it absolutely stunning that JSF EL does not provide an operator for string concatenation. The Java "+" operator is there for the take. Java, which is a strongly typed compiled language, overloads the "+" operator in such a way that any object can be concatenated with a string. But JSF EL, which definitely isn't as strongly typed as Java, restricts the "+" operator to numerical values only! Of course, experts may argue that the "+" operator overloading is a huge design flaw of the Java language. But even so, JSF EL is not the right place to fix it! In some cases, a concatenation operator isn't needed, for example:
<ui:repeat var="tab" value="#{tabs}"> <img ... But in case the concatenated...
Created by Fang on November 10, 2011 09:26:12
Last update: November 10, 2011 09:26:12
Syntax highlighted XML schema for JSF 2.0 Application Configuration Resource File ( faces-config.xml ). Almost 3000 lines!
<?xml version="1.0" encoding="UTF-8"?>
<xsd:sch...
Created by Fang on March 03, 2010 05:16:40
Last update: October 31, 2011 10:22:51
Implicit variables are always available to JSTL - you don't need to set them before using them. Page context: pageContext pageContext properties: Name Type Description page javax.servlet.Servlet The current servlet request request javax.servlet.ServletRequest The current servlet request response javax.servlet.ServletResponse The current servlet response servletConfig javax.servlet.ServletConfig The servlet config servletContext javax.servlet.ServletContext The application session javax.servlet.http.HttpSession The current HTTP session Note: request , response etc., is not directly available, you access them with pageContext.request , pageContext.response , etc. Scope variables: pageScope, requestScope, sessionScope, applicationScope Name Type Description pageScope java.util.Map Name-value pair of page scoped variables requestScope java.util.Map Name-value pair of request scoped variables sessionScope java.util.Map Name-value pair of session scoped variables applicationScope java.util.Map Name-value pair of application scoped variables Parameters, HTTP headers and cookies: param, paramValues, header,...
Created by Fang on October 28, 2011 13:49:40
Last update: October 30, 2011 19:23:25
This is a simple example to demonstrate the templating power of JSF facelets. If you've used struts tiles before, you'll recognize the simplicity of templating with facelets. I've stripped out everything else except the pages themselves, just to put our focus on facelets. This is a Maven based project, and you need Tomcat (or any servlet container) to run the resulting webapp. To begin with this is the list of files:
./pom.xml ./src/main/webapp/home.xhtml ./src... I left faces-config.xml in there for completeness sake, it may not be needed. The Maven POM ( pom.xml ): <?xml version="1.0" encoding="UTF-8"?> <project... Web app configuration ( WEB-INF/web.xml ): <?xml version="1.0" encoding="UTF-8"?> <web-app... Empty WEB-INF/faces-config.xml : <?xml version="1.0" encoding="UTF-8"?> <!-- Thi... index.jsp is simply a redirect to home.jsf : <% response.sendRedirect("home.jsf"); %>...
Created by James on October 25, 2011 19:44:30
Last update: October 25, 2011 19:45:40
jQuery automatically maps HTML5 custom data attributes to data storage associated with the data() method. Here's an example:
<html>
<head>
<script type="text/javascript"...
Created by magnum on September 27, 2011 11:57:49
Last update: October 05, 2011 12:20:00
This procedure sets up an IPSec vpn server on Linux with Preshared Key (PSK) using Openswan .
Install Openswan:
# yum install openswan
Edit /etc/ipsec.conf . This is about the minimum needed to run IPSec server. Instead of running L2TP on port 1701, I'm running TCP on port 8080 so that I can test the setup with nc later.
# /etc/ipsec.conf - Openswan IPsec configurati...
Edit /etc/ipsec.secrets .
#
# Preshared key for clients connecting from a...
Start IPSec:
# /etc/init.d/ipsec start
Check status:
# ipsec auto --status
Monitor IPSec log:
# less /var/log/secure
If IPSec is running KLIPS, you should see a new nic ( ipsec0 ). There's no ipsec0 if IPSec is running NETKEY.
# ifconfig
eth0 Link encap:Ethernet HWadd...
Created by magnum on September 27, 2011 12:55:51
Last update: September 27, 2011 12:55:51
These steps set up a Linux host as IPSec client, using Openswan .
Install Openswan:
# yum install openswan
Edit /etc/ipsec.conf . Instead of L2TP on port 1701, I'm setting up TCP on port 8080 so that I can test the connection with nc .
# /etc/ipsec.conf - Openswan IPsec configuration f...
Edit /etc/ipsec.secrets .
# include /etc/ipsec.d/*.secrets
192.168.0.101 ...
Start IPSec:
# /etc/init.d/ipsec start
Connect to IPSec server:
# ipsec auto --up TCP8080-PSK-CLIENT
104 "TCP80...
Created by magnum on September 19, 2011 08:52:35
Last update: September 20, 2011 09:14:02
This is a step-by-step guide: How to setup pptp vpn server on linux (fedora 14) It looks like that the only PPTP server on Linux that had any influence was Poptop , which was last updated in 2007. There doesn't seem to be much interest in keeping pptpd up-to-date on Linux, and the reason could be that PPTP itself isn't much secure. From Wikiperia : PPTP has been the subject of many security analyses and serious security vulnerabilities have been found in the protocol. The known vulnerabilities relate to the underlying PPP authentication protocols used, the design of the MPPE protocol as well as the integration between MPPE and PPP authentication for session key establishment. In fact, the maintainers of PPTP Client and Poptop recommend...
Created by freyo on September 14, 2011 16:30:03
Last update: September 14, 2011 16:30:03
Select from the system table:
$ android-sdk-linux_86/platform-tools/adb shell
...
Other useful commands:
sqlite> .databases
seq name file ...
