• Title, Summary, Keyword: Linux

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Trend analysis and Classification of Linux distributions (리눅스 배포판의 분류 및 동향 분석)

  • Jung, Sung-Jae;Sung, Kyung
    • Journal of Digital Contents Society
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    • v.18 no.2
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    • pp.357-363
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    • 2017
  • The Linux operating system, considered to be a subset of the UNIX operating system, is becoming the backbone of the enterprise server market and is seen as the key to building cloud computing and big data infrastructures. Linux has a variety of Linux distributions due to the fact that the source is open and anyone can freely modify and distribute it. First of all, Linux dominated the server market, the emergence of various distributions dominates the desktop and mobile operating system markets. In this paper, we examine the birth and history of Linux and classify and characterize various Linux distributions. The emergence of various Linux distributions will play a pivotal role in the Internet of Things and will further expand their power.

The Analysis of Memory Map for Improving the Execution Speed of Embedded Linux Kernel (임베디드 리눅스 커널의 실행속도 향상을 위한 메모리 맵 분석)

  • Lee, Doo-Wan;Jang, Kyung-Sik
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.801-804
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    • 2009
  • In this paper, the Linux kernel memory map was analyzed as the approach to Improving performance for Embedded Linux system. Since the Linux kernel memory map supporting a stability and various H/W platforms and in which it becomes to the general purpose system with optimization manages the role of being important in the booting time and the efficient system utilization of resources, the analysis of the kernel memory map is required for the performance improvement of the Embedded Linux system in which it is restrictive the resources. According to the analysis result, and of the Linux kernel memory, the booting speed of and improvement of the memory efficiency were confirmed. It is therefore considered that the proposed in this paper and kernel memory allocation method are suitable to the memory availability improvement of the Embedded Linux system.

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Management and Security of User in Linux Server (리눅스 서버의 사용자 관리 및 보안)

  • Jung, Sung-Jae;Sung, Kyung
    • The Journal of Advanced Navigation Technology
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    • v.19 no.6
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    • pp.587-594
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    • 2015
  • Open operating system, Linux is the traditional Web, E-mail, DNS, FTP server, as well as being used in Cloud and Big data infrastructure. In addition, Linux is also used like a desktop or mobile devices, smart TV and cars. In particular, stepping up to the IoT era at this time is expected to be greater proportion occupied by Linux. As the use of Linux has increased security has emerged as an important factor. User management is core of Linux system security. In this paper, Classifying Linux user and analyzed the role of the user-specific file. Finally, we analyzed the linux management technologies and useful user security tools.

Design of the Kernel Hardening in the Linux O.S. (Linux 운영체제에서 Kernel Hardening 설계)

  • Moon, Ji-Hoon;Kim, Ki-Hwan;Jang, Seung-Ju;Jung, Seung-In
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.431-434
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    • 2003
  • 본 논문에서는 Linux 운영체제에서의 kernel hardening을 설계한다. 커널 내에서 panic 이 발생할 경우 복구가 가능한 경우에는 정상적인 동작이 될 수 있도록 한다. 이렇게 함으로써 Linux Kernel Hardening 기능은 안정적인 커널의 동작을 보장한다. 본 논문에서 Linux Kernel Hardening을 보장하기 위하여 커널 내 ASSERT(), BUG() 함수를 중심으로 설계를 한다.

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The Real-Time Linux Based Robot Controller (리얼 타임 리눅스 기반 개방형 로봇 제어기)

  • Shin, Joo-Ho;Moon, Seung-Bin
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.505-508
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    • 2002
  • 본 논문은 Real-Time Linux를 기반으로 하는 개방형 로봇 제어기에 관한 내용이다. 여기서 Real-Time OS는 시스템의 수행결과가 기능적으로 정확해야 할 뿐만 아니라, 결과가 도출되는 시간 역시 주어진 제약 조건을 만족시켜야 하는 시스템이 이다. 이러한 특징 때문에 RTOS(Real-Time OS)는 항공, 전자, 기계분야뿐만 아니라 네트워크 분야에서도 많이 적용되어지고 있다. 본 논문에서는 Open Source를 지향하고 있는 범용의 Linux를 기반으로 하는 Real-Time Linux를 이용하여 로봇을 제어하는 구현을 함으로서 Real-Time Linux의 제어분야에 적용가능성을 제시해 본다.

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A Study on the Protection against Buffer-Overflow Attack using Modifed Linux Kernel (Linux 커널 수정을 통한 Buffer Overflow Attack 방지에 관한 연구)

  • 서정택;최홍민;손태식;김동규
    • Proceedings of the Korean Information Science Society Conference
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    • pp.635-637
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    • 2000
  • Linux는 다양한 하드웨어 플랫폼을 지원하며, 강력한 네트워크 지원 기능, 다양한 형식의 파일시스템 지원 기능 등 높은 성능을 자랑한다. 그러나, 소스코드의 공개로 인하여 많은 보안상의 취약성을 내포하고 있으며, 최근 이를 이용한 해킹사고가 많이 발생하고 있다. 본 논문에서는 Linux상에 상존하는 보안 취약성을 조사하고, 보안 요구사항을 도출하며, 최근 해킹의 상당부분을 차지하고 있는 Buffer Overflow 공격 방지를 위한 방안으로 커널 수정을 통해 Secure Linux를 개발하고자 한다.

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The Implementation of Data Logging System by Using VME Modules based on Real Time Linux (RT-Linux를 OS로 하는 VME시스템을 이용한 Data Logging System 구현)

  • Hwang, Seok-Kyun;Koo, Kyung-Mo;Joo, Moon-G.;Lee, Jin-S.
    • Proceedings of the KIEE Conference
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    • pp.709-712
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    • 2003
  • In this research, we port the RT-Linux to MVME 5100 board which is driven by VxWorks or Vertex until now. And, we developed the data logging modules by using the RT-Linux. This module gathers two different scan timing data from plant and sends this data to the host controller with real time.

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A Study on the Distributed Real-time Mobile Robot System using TCP/IP and Linux (Linux와 TCP/IP를 이용한 분산 실시간 이동로봇 시스템 구현에 관한 연구)

  • 김주민;김홍렬;양광웅;김대원
    • Journal of Institute of Control, Robotics and Systems
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    • v.9 no.10
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    • pp.789-797
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    • 2003
  • An implementation scheme and some improvements are proposed to adopt public-licensed operating system, Linux and de-facto world-wide network standard, TCP/IP into the field of behavior-based autonomous mobile robots. To demonstrate the needs of scheme and the improvement, an analysis is performed on a server/client communication problem with real time Linux previously proposed, and another analysis is also performed on interactions among TCP/IP communications and the performance of Linux system using them. Implementation of behavior-based control architecture on real time Linux is proposed firstly. Revised task-scheduling schemes are proposed that can enhance the performance of server/client communication among local tasks on a Linux platform. A new method of TCP/IP packet flow handling is proposed that prioritizes TCP/IP software interrupts with aperiodic server mechanism as well. To evaluate the implementation scheme and the proposed improvements, performance enhancements are shown through some simulations.

Implementation of Linux Server System Monitoring and Control Solution for Administrator (관리자를 위한 리눅스 서버 시스템 모니터링 및 제어 솔루션 구현)

  • Yoon, Hyo-Jun;Park, Byung-Ho;Choi, Yong-Seok;Kim, Chong-Soo;Seong, Hyeon-Kyeong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.125-128
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    • 2010
  • Linux server offers various kinds of service including web, FTP, and SSH. The users of these kinds of service are trying to hack by making use of it. That’s why some countermeasures are required for the security of the server. In this thesis, each type of service log of multiple Linux server was analyzed, and a solution was developed to monitor and control the multiple Linux server system not based on Linux but based on Windows.

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Implementation of Dual-Kernel based Control System and Evaluation of Real-time Control Performance for Intelligent Robots (지능형 로봇을 위한 이중 커널 구조의 제어 시스템 구현 및 실시간 제어 성능 분석)

  • Park, Jeong-Ho;Yi, Soo-Yeong;Choi, Byoung-Wook
    • Journal of Institute of Control, Robotics and Systems
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    • v.14 no.11
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    • pp.1117-1123
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    • 2008
  • This paper implements dual-kernel system using standard Linux and real-time embedded Linux for the real-time control of intelligent robot systems. Such system provides more useful services including standard Linux thread that is easy to implement complicated tasks and real-time tasks for the deterministic response to velocity control. Here, an open source real-time embedded Linux, XENOMAI, is ported on embedded target board. And for interfacing with motor controller we adopted a real-time serial device driver. The real-time task was implemented with a priority to keep the cyclic control command for trajectory control. In order to validate deterministic response of the proposed system, the performance measurement of the delay in performing trajectory control with feedback loop is evaluated with non real-time standard Linux. The proposed software architecture is anticipated to take advantage of features in both standard Linux and real-time operating systems for the intelligent robot systems.