The world of embedded system faces many challenges. Due to availability of several sections of modern applications in the present era of technology, today__ampersandsign#39;s demand is very high performance from systems but with minimum resources. Embedded systems are also known as real time systems since they respond to an input or event and produce the result within a guaranteed time period. Usage of RTOS will enable us to break the complex system into simpler tasks without disturbing the inter task timing problems. Embedded systems require only the basic functionalities of an operating system in real-time environment- a scaled down version of an RTOS. It demands reliability and the ability to customize the OS to match an application__ampersandsign#39;s unique requirements. But, due to the advancements in technology, we need an open source environment i.e. Linux which has the capability to provide reliable and flexible configuration to any embedded application in the next generation of embedded system design. Linux offers powerful and refined system management facilities, it is a rich tool of device support, an excellent status for reliability, robustness and broad documentation. In this paper, we try to summarize some current trends in embedded systems design and point out some of their environment characteristics, such as RTOS and Linux platform which can provide a flexible and efficient ground for satisfying the area, performance, cost, and power requirements of many embedded systems.