HTTP Strict Transport Security (HSTS) instructs web browsers to only use secure connections (https://) for all future requests when communicating with a web site. Doing so helps prevent SSL protocol attacks, SSL stripping, cookie hijacking, and other attempts to circumvent SSL protection.
By now you may know that PHP 7 has been available for quite some time now coming with a number of improvements over version 5. It may be wise to upgrade to PHP7 when running for instance a WordPress using Amazon AWS where you are responsible for any upgrades.
Also as of July 2016, Amazon officially added PHP7 to its repository so you can install it using
yum. So first thing I did was create a backup image of my EC2 instance before I went on with the upgrade. Once I had my backups done and proceeded with the PHP 7 upgrade.
Here are the steps I took in order to upgrade from PHP 5.x to 7.
Login to your Linux instance and perform the regular system updates first
$ sudo yum update
Stop the running webserver
$ sudo service httpd stop
Remove any existing PHP packages
$ sudo yum
Slack is one of the most popular collaboration platforms in the world that brings all your communication together. Conversations in Slack are organized in channels. You can create channels for your teams, projects, topics, or any other purpose to keep information and conversations organized. You can search through everything that’s been posted in channels or your messages. Slack also allows you to talk with your teammates over audio or video calls and share documents, images, videos, and other files.
Slack is not an open-source application and it is not included in the Ubuntu repositories.
This tutorial explains how to install Slack on Ubuntu 18.04. The same instructions apply for Ubuntu 16.04 and any other Debian based distribution, including Debian, Kubuntu, Linux Mint and Elementary OS.