centos

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Intel CPUs and Supported Red Hat Enterprise Linux (RHEL) Versions

2016-12-28 KENNETH 0

URL : https://access.redhat.com/support/policy/intel   Intel CPUs and Supported Red Hat Enterprise Linux (RHEL) Versions The follow table lists the minimum versions and update releases of Red Hat Enterprise Linux (RHEL) that are required to support Intel processors. Red Hat Enterprise Linux 4 Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Vendor Family Name Version Knowledgebase Resource(s) Version Knowledgebase Resource(s) Version Knowledgebase Resource(s) Version Knowledgebase Resource(s) Intel Xeon® Processor X5500, W5500, L5500, E5500 series 4.7 15223 5.3 15223 6.0 7.0 Intel Xeon® Processor X7500, X6500, L7500, E7500, E6500 series Not supported 5.4.z (1) 25195, 42231 6.0 7.0 Intel Xeon® Processor X5600, W3600, L5600, E5600 series 4.8 24382 5.3 24382 6.0 7.0 Intel Xeon® Processor E-2800, E-4800 and E-8800 series Not supported 5.5 58721 6.0 7.0 Intel Core™ i3-2100,    i3-2300 Family Processors Not supported 5.6 6.0 [ more… ]

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keepalive + LVS on centos7

2016-03-31 KENNETH 0

개요   가상아이피 : 192.168.100.210 WEB1(real server) : 192.168.100.201 WEB2(real server) : 192.168.100.202 WEB서버에  keepalive+ipvsadm 패키지를 이용해서 LVS를 병행 구성 LVS구성시 real server 의 유효함을 판단 하는 방식 : URL HASH 체크 서버의 NIC 이름 : enp2s0f0 (서버마다 다를 수 있으므로 확인 할 것)   sysctl   sysctl의 net.ipv4.ip_forward = 1 상태여야함… echo “net.ipv4.ip_forward = 1” >> /etc/sysctl.conf sysctl -p   패키지 설치   yum install keepalived ipvsadm   URL HASH 값 구하기   genhash -s 192.168.100.201 -p 80 –url /lvs/lvs_check.php genhash -s 192.168.100.202 -p 80 –url /lvs/lvs_check.php 실행된 결과 값이 MD5SUM = 384dc7f45228c6ff3ecaa6cc8d15bccb MD5SUM = 384dc7f45228c6ff3ecaa6cc8d15bccb 대략 이렇게 나왔다고 가정하자   마스터 설정   /etc/keepalived/keepalived.conf global_defs { notification_email { } router_id LVS_DEVEL } vrrp_instance VI_1 { state MASTER interface enp2s0f0 virtual_router_id 200 priority 200 advert_int 1 authentication { auth_type PASS auth_pass ilayapass } virtual_ipaddress { 192.168.100.210 } } virtual_server 192.168.100.210 [ more… ]

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firewalld 기반의 접근제어 사용하기

2016-03-15 KENNETH 1

환경 OS : CentOS-7 전통적인 iptables 를 기반으로 하지만.. firewalld 라는 패키지로 관리함… 그냥 iptables 를 사용하던가.. firewall-cmd 를 사용하던가.. 편한대로 사용하면 됨   설정파일 설정 경로 : /etc/firewalld firewall-cmd를 이용해서 일반적인 설정을 하게 되면 /etc/firewalld/zones/public.xml 에 저장됨… 설치후 별다른 추가 설정을 하지 않았다면 firewall-cmd –get-default-zone 명령어를 실행 한 결과는 ”public”으로 출력될 것이다.   기본 사용법 환경 : 터미널 기반 명령어 : firewall-cmd   조건 : 20,22,80포트(TCP)를 허용 룰 추가 firewall-cmd –add-port=21/tcp firewall-cmd –add-port=22/tcp firewall-cmd –add-port=80/tcp 룰 삭제 firewall-cmd –remove-port=21/tcp firewall-cmd –remove-port=22/tcp firewall-cmd –remove-port=80/tcp   조건 : 8000 ~ 9000 까지의 포트(TCP)를 허용 firewall-cmd –add-port=8000-9000/tcp firewall-cmd –remove-port=8000-9000/tcp   조건 : 192.168.0.0/255.255.255.0 대역을 허용 firewall-cmd –add-source=192.168.0.0/24 firewall-cmd –remove-source=192.168.0.0/24   조건 : 192.168.3.100 아이피를 허용 firewall-cmd –add-source=192.168.3.100 firewall-cmd –remove-source=192.168.3.100   조건 : 192.168.5.100 아이피를 차단 firewall-cmd –add-rich-rule=’rule family=”ipv4″ source address=192.168.5.100 reject’ firewall-cmd –remove-rich-rule=’rule family=”ipv4″ source address=192.168.5.100 reject’ firewall-cmd –add-rich-rule=’rule family=”ipv4″ source address=192.168.5.100 [ more… ]

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install pptpd on linux (centos)

2016-02-25 KENNETH 0

리눅스에서 PPTP 구성 하기 (아직 작업중.. 문제가 있으므로 완전한 내용이 아님.. -_-;;;)   개요   VPN 사용 IP 대역 : 10.100.200.0/24 리눅스서버(PPTP 설치 서버) IP : 10.100.200.1 VPN 접속 클라이언트들의 IP 할당 범위 : 10.100.200.101 ~ 10.100.200.200 (뭐 사실 의미는 없다만, 설정법이 있다는 것을 같이 설명 하기 위해… )   환경   OS : LINUX (CentOS-6.X) 설치방식 : yum 을 이용함…   패키지 설치   1. epel-release 설치 yum install epel-release ppp의 경우 centos설치시 기본 으로 제공 되는 repository 로 설치 가능 pptpd의 경우 기본 repository에 없기 때문에 epel-release를 설치해야함 pptpd 외에도, 기본 repository에서 제공하지 않는 패키지중 필요한 것이 종종 있음 (되도록 설치 할 것) 2. ppp, pptpd 설치 yum install ppp pptpd   설정   1. /etc/pptpd.conf option /etc/ppp/options.pptpd connections 200 localip 10.100.200.1 remoteip 10.100.200.101-200   2. /etc/ppp/options.pptpd ms-dns 8.8.8.8 ms-dns 8.8.4.4 lock name pptpd require-mschap-v2 require-mppe-128   3. Controls IP [ more… ]

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How to solve “Unable to run mksdcard SDK tool” when installing Android Studio on Centos7

2016-02-05 KENNETH 0

  리눅스에서 안드로이드 스튜디오 설치&실행 시 “Unable to run mksdcard SDK tool” 오류   환경 OS : LINUX(CentOS-7.2.1511) / 64bit JAVA : jdk-1.7.0_80 (JAVA_HOME=/usr/local/java) AndroidStudio : android-studio-ide-141.2456560-linux.zip   터미널 콘솔 에러 studio.sh 실행시 [ 6301] WARN – dea.updater.SdkComponentSource – Couldn’t find existing SDK [ 16543] ERROR – ard.ConsolidatedProgressStep$1 – Unable to run mksdcard SDK tool. com.android.tools.idea.welcome.install.WizardException: Unable to run mksdcard SDK tool. at com.android.tools.idea.welcome.install.CheckSdkOperation.perform(CheckSdkOperation.java:128) at com.android.tools.idea.welcome.install.CheckSdkOperation.perform(CheckSdkOperation.java:40) at com.android.tools.idea.welcome.install.InstallOperation.execute(InstallOperation.java:68) at com.android.tools.idea.welcome.install.InstallOperation$OperationChain.perform(InstallOperation.java:151) at com.android.tools.idea.welcome.install.InstallOperation.execute(InstallOperation.java:68) at com.android.tools.idea.welcome.install.InstallOperation$OperationChain.perform(InstallOperation.java:149) at com.android.tools.idea.welcome.install.InstallOperation.execute(InstallOperation.java:68) at com.android.tools.idea.welcome.install.InstallOperation$OperationChain.perform(InstallOperation.java:149) at com.android.tools.idea.welcome.install.InstallOperation.execute(InstallOperation.java:68) at com.android.tools.idea.welcome.install.InstallOperation$OperationChain.perform(InstallOperation.java:149) at com.android.tools.idea.welcome.install.InstallOperation.execute(InstallOperation.java:68) at com.android.tools.idea.welcome.wizard.InstallComponentsPath.runLongOperation(InstallComponentsPath.java:297) at com.android.tools.idea.welcome.wizard.ConsolidatedProgressStep.doLongRunningOperation(ConsolidatedProgressStep.java:78) at com.android.tools.idea.welcome.wizard.ConsolidatedProgressStep.access$000(ConsolidatedProgressStep.java:32) at com.android.tools.idea.welcome.wizard.ConsolidatedProgressStep$1.run(ConsolidatedProgressStep.java:58) at com.android.tools.idea.welcome.wizard.FirstRunWizardHost$LongRunningOperationWrapper.run(FirstRunWizardHost.java:434) at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:563) at com.intellij.openapi.progress.impl.CoreProgressManager$2.run(CoreProgressManager.java:152) at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:452) at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:402) at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:54) at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:137) at com.intellij.openapi.progress.impl.ProgressManagerImpl$1.run(ProgressManagerImpl.java:126) at com.intellij.openapi.application.impl.ApplicationImpl$8.run(ApplicationImpl.java:400) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) at org.jetbrains.ide.PooledThreadExecutor$1$1.run(PooledThreadExecutor.java:56) [ 16545] ERROR – ard.ConsolidatedProgressStep$1 – Android Studio 1.5.1 Build #AI-141.2456560 [ 16545] ERROR – ard.ConsolidatedProgressStep$1 – JDK: 1.7.0_80 [ more… ]