Postfix and SendGrid Configuration Server-Side on CentOS/RHEL/Ubuntu

SMTP (Simple Mail Transfer Protocol) is a easy way to send email from one server to another. SendGrid provides an SMTP service that allows you to deliver your email via our server instead of your client or

SendMail and SendGrid Configuration Server-Side on CentOS/RHEL/Ubuntu

SMTP (Simple Mail Transfer Protocol) is a easy way to send email from one server to another. SendGrid provides an SMTP service that allows you to deliver your email via our server instead of your client or

Unable to read consumer identity Warning and Solution

I am using yum update command with RHN to upgrade packages installed on my server, but getting unable to read consumer identity warning and solution error on screen : See Also: SERVER PATCHING USING YUM IN LINUX

Red Hat Enterprise Linux 8 – New Features

RHEL 8 Beta version got released on Nov 14, 2018 and Beta version is available for developers. This release came after IBM acquired Red Hat for $34 billion on October 28, 2018. See Also: Red Hat Enterprise

Red Hat 8 Beta Installation with Screenshot

RHEL 8 Beta version got released on Nov 14, 2018 and Beta version is available for developers. This release came after IBM acquired Red Hat for $34 billion on October 28, 2018. See Also: HOW TO CREATE

How to Install Python 3.5.6 on Ubuntu

Python is an open source, portable, free, customization, effective and modern programming language that offers a wide range of attractive functionality and allows application developers to create software projects that are fully compatible with all mainstream operating

Install Python 3.5.6 on CentOS/RHEL 7/6

Python 3.5.6 is a new version of the language, which is incompatible with the 2.x line of releases. The language is mostly the same, but many details, especially how built-in objects like dictionaries and strings work, have

How to rename the network interface in CentOS/RHEL7

I think everyone noticed that in Linux 7 network interface name has been changed from eth[0,1..] to ens. But in some organization they what to use eth as a standard network interface name. In this article we

How to block Denial of Service (DoS) with null route

On a Linux/Unix system you can mitigate the effects of an attack by blocking the communication with the attacking ip addresses. You can either do this by creating IPTables Rules or via a null route also known

List all IP addresses connected to your Server

We have multiple methods to list all the IP addressed, but below is a Unix command to list all the IP addresses connected to your server on port 80. List all the IP Address # netstat -tn