Dnsmasq Centos7

One could only guess that the rationale for lack of DNS caching in RHEL is the arguable efficiency for those systems which aren’t network connected or simply don’t need to make any DNS lookups. There are of course such cases where you don’t need (many) DNS resolutions. I can think of: a dedicated DB server […]

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DOCKER INSTALL CENTOS7

CentOS 7 non-root users install source version of Docker Check if the current host has a docker group cat /etc/group | grep docker sudo groupadd docker cat /etc/group | grep docker useradd test cat /etc/passwd | grep dev01 Add sudo permissions for new users vi /etc/sudoers ??Add on line 92 next line ??dev01 ALL = […]

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How to install Apache, PHP 7.3 and MySQL on CentOS 7.6

How to install Apache, PHP 7.3 and MySQL on CentOS 7.6 I will add the EPEL repo here to install latest phpMyAdmin as follows: rpm –import /etc/pki/rpm-gpg/RPM-GPG-KEY* yum -y install epel-release Installing MySQL / MariaDB MariaDB is a MySQL fork of the original MySQL developer Monty Widenius. MariaDB is compatible with MySQL and I’ve chosen […]

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Create an SSH server alias on a Linux system

If you frequently access many different remote systems via SSH, this technique will save you some time. You can create SSH aliases for frequently accessed systems via SSH, so you don’t have to remember all the different usernames, hostnames, SSH port numbers, and IP addresses. In addition, it avoids repeatedly entering the same username, hostname, […]

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Steps to install Oracle 19c in CentOS 7.6 RPM mode

Steps to install Oracle 19c in CentOS 7.6 RPM mode Download the required installation package: 1.1 preinstall http://yum.Oracle.com/repo/OracleLinux/OL7/latest/x86_64/getPackage/oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm 1.2 Oracle rpm installation package https://www.oracle.com/technetwork/database/enterprise-edition/downloads/index.html It is recommended to download at home or see the VPN proxy download speed in the company. Installation. yum localinstall -y oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm Install after installation is complete yum localinstall -y oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm […]

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Simple way to configure Ngnix High Availability Web Server with Pacemaker and Corosync on CentOS7

Pacemaker is an open source cluster manager software which provide high availability of resources or services in CentOS 7 or RHEL 7 Linux. It has feature of scalable and advanced HA Cluster Manager. This HA cluster manager distributed by ClusterLabs. Corosync is the core of Pacemaker Cluster Manager as it is responsible for generating heartbeat […]

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check Redhat version

The objective of this guide is to provide you with some hints on how to check system version of your Redhat Enterprise Linux (RHEL). There exist multiple ways on how to check the system version, however, depending on your system configuration, not all examples described below may be suitable. For a CentOS specific guide visit How […]

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pyenv + pyenv-virtualenv (CentOS 7)

Overview I summarized the installation on CentOS. Although it is little different from OSX, it is organized because the premise environment is different. environment I am trying in the next environment. $ uname -r 3.10.0-229.14.1.el7.x86_64 $ lsb_release -a LSB Version: :core-4.1-amd64:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-noarch:languages-4.1-amd64:languages-4.1-noarch:printing-4.1-amd64:printing-4.1-noarch Distributor ID: CentOS Description: CentOS Linux release 7.1.1503 (Core) Release: 7.1.1503 Codename: Core Installing […]

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