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MinnowBoard – Open source computer powered by Intel Atom processor

           Open source software and hardware projects are new and innovative all over the world. Developers are contributing a lot for open source projects and most of the those projects really come out well. Some of the successful open source projects are Linux OS, Parallella etc. Intel is another company to join in… Read More »

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Oracle VirtualBox VM- Change to Full Screen Mode from Windowed Mode

           You may have faced this problem in Oracle VirtualBox where we will not be able to change the virtual machine(VM) display size to full screen mode, i.e. the virtual machine will  be in windowed mode. To fix this issue, follow the below steps. Steps: Step 1: Run the virtual machine(any Operating… Read More »

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Append/Write CRON Output to Log File in Linux (Unix)

Append CRON Output to Log :            The following syntax can be used to append the output of the shell scripts to the given file. Syntax : CRON_EXPRESSION COMMAND >> /OUTPUT_LOG_FILE_PATH/LOF_FILE 2>&1 Example :            The following example will append the output of the shell script test.sh to cron_output.log in the… Read More »

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Java – Break Filter Chain and Return Custom POJO Response from Servlet Filter

Sample Servlet Filter : package com.application.test.security; import com.application.test.response.ErrorResponse; import com.fasterxml.jackson.databind.ObjectMapper; import javax.servlet.*; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; public class TestFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,ServletException { if(ANY CONDITION){ //ANY POJO CLASS ErrorResponse errorResponse = new ErrorResponse();… Read More »

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MYSQL on Linux(Ubuntu) keeps crashing – Solution is to create Swap Space

          There are many internet users who face this problem where the MYSQL on their server getting crashed frequently. I personally faced this problem in my WordPress blog in my VPS. This problem occurs due to lack of memory(RAM) space. i.e. when your RAM usage hits the maximum. This problem can… Read More »

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