Help For File modification

Shell Programming and Scripting
1

Hi,
I have a file. File contains are as follows :

Feb 19, 2012 5:05:00 PM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
Feb 19, 2012 5:05:00 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 771 ms
Feb 20, 2012 5:05:00 PM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Feb 20, 2012 5:05:00 PM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.29
Feb 20, 2012 5:05:00 PM org.apache.catalina.startup.HostConfig deployDescriptor
INFO: Deploying configuration descriptor test.xml
SEVERE: Error starting static Resources
java.lang.IllegalArgumentException: Document base /opt/apache-tomcat-6.0.29/webapps/SpendAnalyzer does not exist
        at org.apache.naming.resources.FileDirContext.setDocBase(FileDirContext.java:142)
        at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4249)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4418)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637)
        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
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Feb 24, 2012 5:05:01 PM org.springframework.web.context.ContextLoader initWebApplicationContext
INFO: Root WebApplicationContext: initialization started
Feb 24, 2012 5:05:01 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.web.context.support.XmlWebApplicationContext@5e4be2cc: display name 
Feb 24, 2012 5:05:01 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/applicationContext.xml]
Feb 24, 2012 5:05:02 PM org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory
INFO: Bean factory for application context

I want to cut only Feb 20 data or Feb 21 or any date.Here I have cut Feb 20 data. I want to pass date as a variable because I want to cut any date data.
The output like this

Feb 20, 2012 5:05:00 PM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Feb 20, 2012 5:05:00 PM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.29
Feb 20, 2012 5:05:00 PM org.apache.catalina.startup.HostConfig deployDescriptor
INFO: Deploying configuration descriptor test.xml
SEVERE: Error starting static Resources
java.lang.IllegalArgumentException: Document base /opt/apache-tomcat-6.0.29/webapps/SpendAnalyzer does not exist
        at org.apache.naming.resources.FileDirContext.setDocBase(FileDirContext.java:142)
        at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4249)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4418)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637)
        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)

Please help me.
Thanks in advance

2 
$ awk -v date="Feb 19" '{if($0~date){print;getline;print}}' o.txt
Feb 19, 2012 5:05:00 PM org.apache.coyote.http11.Http11Protocol init
 INFO: Initializing Coyote HTTP/1.1 on http-8080
 Feb 19, 2012 5:05:00 PM org.apache.catalina.startup.Catalina load
 INFO: Initialization processed in 771 ms

$ awk -v date="Feb 20" '{if($0~date){print;getline;print}}' o.txt
 Feb 20, 2012 5:05:00 PM org.apache.catalina.core.StandardService start
 INFO: Starting service Catalina
 Feb 20, 2012 5:05:00 PM org.apache.catalina.core.StandardEngine start
 INFO: Starting Servlet Engine: Apache Tomcat/6.0.29
 Feb 20, 2012 5:05:00 PM org.apache.catalina.startup.HostConfig deployDescriptor
 INFO: Deploying configuration descriptor test.xml

$ awk -v date="Feb 24" '{if($0~date){print;getline;print}}' o.txt
 Feb 24, 2012 5:05:01 PM org.springframework.web.context.ContextLoader initWebApplicationContext
 INFO: Root WebApplicationContext: initialization started
 Feb 24, 2012 5:05:01 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh
 INFO: Refreshing org.springframework.web.context.support.XmlWebApplicationContext@5e4be2cc: display name 
 Feb 24, 2012 5:05:01 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
 INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/applicationContext.xml]
 Feb 24, 2012 5:05:02 PM org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory
 INFO: Bean factory for application context
3

Hi itkamaraj,
Your code only print two line after search the date. If I want to print next 10 line after searching the date then what will do?

4

it prints 2 lines because it runs getline once... to print 10 lines run getline 9 times...

I'd simplify that too:

awk -v CTX=10 -v date="Feb 24" '$0 ~ date { print; for(N=0; N<(CTX-1); N++) { if(getline>0) print } }' o.txt