6 Effective Tips for Blocking Email Spam with Postfix SMTP Server

Hits: 5757Not so charming, mega spam! Tip #6: Using Public Anti-Spam Blacklists There are spam emails that are sent from servers that has a valid hostname, valid PTR record and can pass through grey listing. In this case, you can use blacklisting to reject spam. There are many public anti-spam blacklists online. You can use …

Disconnected Registry for Red Hat Openstack and Openshift

Hits: 2693Setup disconnected Docker registry for Rhosp Setup disconnected Docker registry for Rhosp 13 Pre-requisites:1.    Server for registry that has 2 nics to connect to internet and disconnected servers2.    Director configured with latest minor release3.    Current Redhat subscription 4.    Hundreds of GB free, preferably a TB. It is wise to have /var as a separate mounted …

CentOS 7 : Dnsmasq : Install : Server World

Hits: 2292 Install Dnsmasq which is the lightweight DNS forwarder and DHCP Server Software. [1] Install Dnsmasq. [root@dlp ~]# yum -y install dnsmasq [2] Configure Dnsmasq. [root@dlp ~]# vi /etc/dnsmasq.conf # line 19: uncomment (never forward plain names) domain-needed # line 21: uncomment (never forward addresses in the non-routed address spaces) bogus-priv # line 41: uncomment (query …

Battle of the Switches – Open Virtual Switch vs. Linux Bridge

Hits: 343Open Virtual Switch was initially conceived in a university environment, with a flow-based model providing the development primitive, and a central controller determining what those flows actually looked like. The use of OVS as a virtual switch in the IaaS market (and to be specific, in the OpenStack IaaS market) came about because the …

How to Simplify Container Image Management in Kubernetes with OpenShift Image Streams – Red Hat OpenShift Blog

Hits: 2699 Understanding and confuting Image Streams is central for getting Openshift to work as you need it to work, with images and code that you desire. Over the course of the past few weeks, I have been gathering feedback around Image Streams. This feature can cause a lot of misunderstanding and confusion, even for …

בלוגים – Test whether your Openshift is installed and working

Hits: 317Here are some common concepts  that need to be running on your systems, in order to be relavent: Openshift microservices docker kubernetes pods   Work with Docker as microservices saves compute recources, However, it requires re-thinking how development is done. Microservices also enable Continuous Integration of changes to large applications. Red Hat OpenShift is an …

How to show excerpt instead of full post in Twenty Seventeen? – WordPress Information Center

Hits: 3788The directions at the link below were great. I am seeking employment and the employers to see how they will benefit from my vast knowledge!!! The standard twentyseventeen WordPress theme only shows the entire article, even when you chose excerpts. The theme editor didnt work correctly. This is what I did: I made a …

How to get a Shell Prompt from multiple servers and run commands on them ? Clush

Hits: 687 When you have  a bunch of servers that are configured the same and need to run the same task on them you will need a tool that does that. There are several Open Source tools. I was asked to write such a script but quickly fell upon several really popular scripts. The perfect …

Binary log error in mysql – put your configs under [mysqld] not [mysqld_safe]- Stack Overflow

Hits: 550When I am trying to check binary log: SHOW BINARY LOGS; I get this error: ERROR 1381 (HY000): You are not using binary logging. How to resolve this? Can anybody help? Remove section [mysqld_safe] and replace with [mysqld]. It works for me. I had placed new config data under mysqld_safe, which is wrong. I …