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개발/서버
linux netinstall http://mirror.centos.org/centos/6/os/x86_64/ or http://mirror.centos.org/centos/6.7/os/x86_64/1. Download CentOS Net Install (NetInstall) imageSelect mirror here:CentOS 6.7 i386 versionCentOS 6.7 x86_64 versionSelect ISO imageCentOS-6.7-i386-netinstall.isoCentOS-6.7-x86_64-netinstall.iso 2. Burn CentOS 6.7 Image to CD and Boot Computer or Create Bootable USB StickCheck CentOS image MD5 sum and b.. 2015.09.19
개발/CPM
IBM PC-DOS 1.10 (5.25) version 1.10 IBM PC-DOS 1.10 (5.25) version 1.10 Stats/RequirementsCategory:Operating SystemPlatform:DOSRelease:1981End of Life:1989RAM:16 KBDisk Space:160 KBRequired CPU:Intel 8088 @ 4.77MHzType:Console (Text) 2015.09.12
개발/서버
리눅스 커널 코어 덤프 분석 1. 커널 코어 분석 유틸리티 설치하기 yum install --enablerepo=rhel-debuginfo crash kernel-debuginfo 2.커널 코어덤프 파일 분석 시작 하기 crash /usr/lib/debug/lib/modules//vmlinux \ /var/crash/xxxx-xx-xx-xx:xx:xx/vmcore 3.커널 메세지 버퍼내용 확인하기 crash > log 4.커널 satck trace 정보 확인하기 crash > bt 5. 프로세서 상태 확인하기 crash > ps 6. virtual memory 정보 확인하기 crash > vm 7. open file 확인하기 crash > files - crash 명령 소개 sys - 시스템의 일반적인 정보를 출력해 준다. bt -.. 2015.09.10
개발/서버
sge 통신 방식을 ssh 로 전환 sge 통신 방식을 ssh 로 전환qconf -mconf ——————————————————————————————————————-.qlogin_command /engrid/ensge/bin/lx24-amd64/qlogin_wrapperqlogin_daemon /usr/sbin/sshd -irlogin_command /usr/bin/sshrlogin_daemon /usr/sbin/sshd -irsh_command /usr/bin/sshrsh_daemon /usr/sbin/sshd -i.——————————————————————————————————————-vi /engrid/ensge/bin/lx24-amd64/qlogin_wrapper ——————————————————————————————————————- .. 2015.09.10
개발/서버
ddos 방화벽 룰 - 패스워드 공격 :iptables -A INPUT -p tcp —dport 22 -m state —state NEW -m recent —set —name SSHSCANiptables -A INPUT -p tcp —dport 22 -m state —state NEW -m recent —update —seconds 60 —hitcount 8 —rttl —name SSHSCAN -j LOG —log-prefix SSH_SCAN:iptables -A INPUT -p tcp —dport 22 -m state —state NEW -m recent —update —seconds 60 —hitcount 8 —rttl —name SSHSCAN -j DROP혹은 ../etc/rc.d/init.d/iptables save.. 2015.09.10
개발/서버
UNIX IP Stack Tuning Guide v2.7 UNIX IP Stack Tuning Guide v2.7 UNIX IP Stack Tuning Guide v2.7 By Rob Thomas, robt at cymru.com, 03 DEC 2000 Introduction The purpose of this document is to strengthen the UNIX IP stack against a variety of attack types prevalent on the Internet today. This document details the settings recommended for UNIX servers designed to provide network intensive services such as HTTP or routing (firewall.. 2015.09.10

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