Today, I am going to talk about connecting two docker containers with docker network feature. First, we need to create at least two different docker containers. I am going to work with “Oracle DB” and “Oracle WebLogic” docker containers. Let’s check containers and their status with; My containers’ name are “OracleDBOrnek” and “OracleWebLogicSarper” docker ps […]
Some apps and tools that are installed on Linux Distros, may use high Buffer/Cache RAM. As we know, High RAM consumption may cause Server Shutdown or Hang. To aviod this situation, we need to configure apps and tools first,If it does not work, we have a work-around solution as “Buffer/Cache Ram Cleaning” We can make […]
Today, In this article, we will be reviewing the key features and differences betweet CentOS vs Ubuntu Linux distributions. Comparison Features Ubuntu CentOS SYSTEM CORE Based on Debian Based on Redhat UPDATE CYCLE Often Deliberately Infrequent SECURITY Good (but requires additional configuration) Strong SUPPORT CONSIDERATIONS Excellent documentation and support community Good documentation. Small but active user […]
Let’s start with updating all the repositories and installing java; yum update -y wget –no-cookies –no-check-certificate –header “Cookie:oraclelicense=accept-securebackup-cookie” “http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.rpm” yum -y localinstall jdk-8u131-linux-x64.rpm Now, we can download Kafka tar file into local server; wget https://downloads.apache.org/kafka/2.4.1/kafka_2.12-2.4.1.tgz We need to extract Kafka tar file; tar -xzf kafka_2.12-2.4.1.tgz Change its directory; mv kafka_2.12-2.4.1.tgz /usr/local/kafka Now, let’s configure ZooKeeper […]
When we try to ssh one server to another server, It always require password. With a help of OpenSSH package, We can generate authentication keys on local machine and copy public key to the remote server. Generate a key pair on the local server Use ssh-keygen to generate authentication keys for SSH. $ ssh-keygen Install your public […]
When we ssh to the Linux server, If we see “X11-forwarding : x (disabled…)” as down below, We can not use Graphical Interface of Installations or tools. Therefore, we need to install “xorg-x11-server-Xorg, xorg-x11-xauth, xorg-x11-apps” packages. There will be lot of dependencies for installing these packages, make sure you install all the packages using yum. […]
Cassandra Installation on CentOS 7.x Before Installing Cassandra, we need to Install Java 8; yum update -y wget –no-cookies –no-check-certificate –header “Cookie:oraclelicense=accept-securebackup-cookie” “http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.rpm” yum -y localinstall jdk-8u131-linux-x64.rpm We can check java version as down below; To install Cassandra, we need to add following parameters into /etc/yum.repos.d/cassandra.repo [cassandra] name=Apache Cassandra baseurl=https://www.apache.org/dist/cassandra/redhat/311x/ gpgcheck=1 repo_gpgcheck=1 gpgkey=https://www.apache.org/dist/cassandra/KEYS You can […]