Linux allows developers to update source code freely, making it an excellent, low-cost, secure alternative to alternate, more expensive operating systems. It is for this reason that the demand for IT professionals to have an LPI certification is so strong. This study guide provides unparalleled coverage of the LPIC-2 objectives for exams 201 and 202. Clear and concise coverage examines all Linux administration topics while practical, real-world examples enhance your learning process. On the CD, you’ll find the Sybex Test Engine, electronic flashcards, and a glossary containing the most important terms you need to understand..

Prepares you for exams 201 and 202 of the Linux Professional Institute Certification
Offers clear, concise coverage on exam topics such as the Linux kernel, system startup, networking configuration, system maintenance, domain name server, file sharing, and more
Addresses additional key topics for the exams including network client management, e-mail services, system security, and troubleshooting

This must-have study guide serves as an invaluable roadmap to attaining LPI certification.

Error Occurred While Processing Request The web site you are accessing has experienced an unexpected error.
Please contact the website administrator.

The following information is meant for the website developer for debugging purposes.

Error Occurred While Processing Request

The value '' cannot be converted to a number.

The error occurred in D:/wwwroot/traintestcert/estore/training_product.cfm: line 222

220 : 	<cfprocparam  type="In"  cfsqltype="CF_SQL_CHAR" value="A">	
221 : </cfstoredproc>
222 : <cfset cart_total = buytotalamount + GetECommerceMatrix.selling_price>
223 : <cfoutput>
224 : <script type="text/javascript">

Resources:

Check the ColdFusion documentation to verify that you are using the correct syntax.
Search the Knowledge Base to find a solution to your problem.

Browser	claudebot
Remote Address	10.0.130.138
Referrer
Date/Time	18-Apr-24 07:26 PM

Stack Trace

at cftraining_product2ecfm329136785.runPage(D:/wwwroot/traintestcert/estore/training_product.cfm:222)

coldfusion.runtime.Cast$NumberConversionException: The value '' cannot be converted to a number.
	at coldfusion.runtime.Cast._double(Cast.java:825)
	at coldfusion.runtime.Cast._double(Cast.java:803)
	at coldfusion.runtime.Cast._double(Cast.java:1110)
	at coldfusion.runtime.Cast._double(Cast.java:1100)
	at cftraining_product2ecfm329136785.runPage(D:\wwwroot\traintestcert\estore\training_product.cfm:222)
	at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:262)
	at coldfusion.tagext.lang.IncludeTag.handlePageInvoke(IncludeTag.java:735)
	at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:565)
	at coldfusion.filter.CfincludeFilter.invoke(CfincludeFilter.java:65)
	at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:595)
	at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:43)
	at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40)
	at coldfusion.filter.PathFilter.invoke(PathFilter.java:162)
	at coldfusion.filter.IpFilter.invoke(IpFilter.java:45)
	at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:96)
	at coldfusion.filter.BrowserDebugFilter.invoke(BrowserDebugFilter.java:78)
	at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28)
	at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38)
	at coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:60)
	at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38)
	at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22)
	at coldfusion.filter.CachingFilter.invoke(CachingFilter.java:62)
	at coldfusion.CfmServlet.service(CfmServlet.java:226)
	at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:311)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:46)
	at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:47)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:377)
	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:463)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.base/java.lang.Thread.run(Thread.java:834)