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FIXING CORRUPT WINDOWS FILES

dism /online /cleanup–image /restorehealth sfc /scannow

JAVA VERSIONS ON WINDOWS

Slow way Open your Start Menu Go to All Programs Go to Accessories Right-click Command Prompt Select Run as administrator Answer Yes to the following User Account Control question Go/Make somewhere you want this. > c: > mkdir \dev\java > cd \dev\java Set up the symlinks > mklink /d 1.5 “c:\Program Files\Java\jdk1.5.0_22” > mklink /d 1.7 “c:\Program Files\Java\jdk1.7.0” > mklink /d 1.6 “c:\Program Files\Java\jdk1.6.0_27” > mklink /d active 1.7 Set your […]

Centos 7 NIC naming rules

Centos7 provide different naming convention is based on the default firmware, topology, location information to allocate. The advantage of this is that the naming is fully automated, predictable disadvantage is more than eth0 , wlan0 harder to read. For example enp5s0

Naming rules Strategy The default, systemd will be named interfaces based on the following […]

CentOS6.x risk vulnerabilities

This article is only for the Green League vulnerability scan results, in RHEL / CentOS / OEL5.x x64-bit versions exist as high-risk vulnerabilities, where finishing solutions, again through vulnerability scanning, vulnerability has been patched. High-risk OpenSSH ‘schnorr.c’ remote memory corruption vulnerability (CVE-2014-1692) OpenSSH J-PAKE licensing issues Vulnerability (CVE-2010-4478) OpenSSH GSSAPI remote code execution vulnerability (CVE-2006-5051) […]

firewalld Apache and SSH 22 80 443

firewall-cmd –zone=public –add-port=22/tcp –permanent firewall-cmd –zone=public –add-port=80/tcp –permanent firewall-cmd –zone=public –add-port=443/tcp –permanent firewall-cmd –reload

Hadoop vs Spark

Hadoop is to solve big data (up to a computer cannot be stored, a computer cannot be processed within the required time) of reliable storage and processing.

HDFS, the cluster composed by the ordinary PC to provide highly reliable file storage, block by saving multiple copies of the solution to the problem server or hard […]

DOCKER

Docker is an open platform for Sys Admins and developers to build, ship and run distributed applications. Applications are easy and quickly assembled from reusable and portable components, eliminating the silo-ed approach between development, QA, and production environments.

Individual components can be microservices coordinated by a program that contains the business process logic (an evolution […]

Install RabbitMQ

wget http://www.rabbitmq.com/releases/rabbitmq-server/current/rabbitmq-server-3.5.7-1.noarch.rpm rpm –import http://www.rabbitmq.com/rabbitmq-signing-key-public.asc yum install rabbitmq-server-3.5.7-1.noarch.rpm chkconfig rabbitmq-server on /sbin/service rabbitmq-server start /sbin/service rabbitmq-server status rabbitmq-plugins enable rabbitmq_management rabbitmqctl add_user test test rabbitmqctl add_user guest test123 rabbitmqctl set_user_tags test administrator rabbitmqctl set_permissions -p / test “.*” “.*” “.*”

RHCE7 certification study notes

RHCE7 certification study notes

— system file directory structure

, RHEL7 system file directory

Basically RHEL7 directory structure remains the same as the original directory structure RHEL6, the difference is, RHEL7 increasing the Run directory, the default file is used to automatically mount CD-ROM, and CD-ROM in RHEL6 default mount directory is the Media.

choose […]

docker

Docker is an open platform for Sys Admins and developers to build, ship and run distributed applications. Applications are easy and quickly assembled from reusable and portable components, eliminating the silo-ed approach between development, QA, and production environments.

Individual components can be microservices coordinated by a program that contains the business process logic (an evolution […]

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