KENSEI IT BLOG

sysbench 설치 yum install sysbench [root@localhost ~]# sysbench --test=cpu run WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options. sysbench 1.0.9 (using system LuaJIT 2.0.4) Running the test with following options: Number of threads: 1 Initializing random number generator from current time Prime numbers limit: 10000 Initializing wor..

centos7 HA (heartbeat) CENTOS7 에서는 기존까지 사용하던 Heartbeat 패키지가 보이지 않아서 아래와 같이 HA를 구성해보았다. 공식사이트 https://clusterlabs.org/참고한 원문 사이트 https://blog.boxcorea.com/wp/archives/1784 https://www.server-world.info/en/note?os=CentOS_8&p=pacemaker&f=1 https://serverfault.com/questions/783689/pacemaker-how-to-configure-default-gateway-for-virtual-ip https://serverfault.com/questions/996750/how-to-make-clone-res..

mod_status (아파치 상태 모니터링) https://www.tecmint.com/monitor-apache-web-server-load-and-page-statistics/ https://httpd.apache.org/docs/2.4/mod/mod_status.html : 아파치의 상태를 웹 화면으로 보여주는 모듈 ExtendedStatus On

mod-auth-token (OTP URL) https://code.google.com/archive/p/mod-auth-token : 1회용 랜덤 링크 (URL) 생성시 사용

iptables-extensions http://ipset.netfilter.org/iptables-extensions.man.html#lbBQ

iptables CT extension CTThe CT target allows to set parameters for a packet or its associated connection. The target attaches a "template" connection tracking entry to the packet, which is then used by the conntrack core when initializing a new ct entry. This target is thus only valid in the "raw" table. --notrackDisables connection tracking for this packet. --helper nameUse the helper identifie..

curl 명령어 /usr/bin/curl --interface tun1 google.com youtube.com -s -o /dev/null -w "%{http_code}\n" --connect-timeout 1 --interface : 특정 이더넷 장치를 통해서 통신하라 "%{http_code}\n" : 상태 코드를 출력 --connect-timeout 1 : 1초 동안 응답이 없으면 종료 (해당 옵션이 없으면 응답이 있을때 까지 기다림) curl -sI http://192.168.56.5 | awk '/Content-Length/ { print $2 }'

mrtg-ping-probe 다운로드 https://fossies.org/linux/privat/old/mrtg-ping-probe-2.2.0.tar.gz 설치 tar xvfz mrtg-ping-probe-2.2.0.tar.gz cd mrtg-ping-probe-2.2.0 which mrtg/usr/bin/mrtg cp mrtg-ping-probe /usr/bin/ mrtg-ping-probe mrtg-ping-probe: FATAL: ping what?Usage: mrtg-ping-probe [-hsvV] [-d deadtime] [-k count] [-l length] [-o ping_options] [-p [factor*]{min|max|avg|loss|integer}/[factor*]{min|ma..

error - received an unknown control message IPERF iperf 버젼이 맞지 않는 경우 발생 : iperf 버전을 클라이언트와 서버간 같은 2.X, 3.X 로 마춰주면 해결됨

tunctl 설치 vim /etc/yum.repos.d/nux-misc.repo [nux-misc]name=Nux Miscbaseurl=http://li.nux.ro/download/nux/misc/el7/x86_64/enabled=0gpgcheck=1gpgkey=http://li.nux.ro/download/nux/RPM-GPG-KEY-nux.ro yum --enablerepo=nux-misc install tunctl