Chapter 4 - DSpace at Waseda University

Chapter 2
memory and to manage system devices and memory, processes, I/O devices. Every system
has the kernel and it affects whole performance [4] of the system by its kernel performance.
Therefore kernel is important such as the embedded system industries.
The most important feature of the Linux kernel is that users can modify the kernel by
themselves. The Linux kernel also distributes type of sources and it can download through
distributed package and ftp or BBS user group such as other Linux programs. The
environments for compile easily set up by using few well-made scripts and easily find
documents in the internet. The policy of open sources is one of the reasons and the Linux
kernel and user groups were achieved quantum leap. Linux’s open mind can make rapid and
strong kernel even if other OSes are fettered by commercialism.
The following points are Linux kernel’s strengths [24].
� No royalty: Linux can be downloaded from the Internet without a continental free. It
is to decrease development costs.
� Open source: it is possible to expand OS.
� As Linux system is stable, the possibility of error is low.
� Linux can be used in a variety of types of hardware
� Safe: Security model used Linux based on ideas used UNIX security, famous for its
toughness and proven quality.
� An immediate modification is possible when the kernel bugs occurred.
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