How to hibernate from the lock screen on Ubuntu 18

By default Ubuntu doesnt support hibernate option. Even when u enable it using "pm-utils" during resume(wake-up) your laptop will not require password. 
And this is very risky moment. 

In my case, I created a keyboard shortcut which enables hibernate and lock. 
Today I will share steps how you also can do it for your laptop/pc.

How to change Google Play Country on Android

As you know, Google Play filters some apps on a per country and/or per region basis. And I also when relocated to Poland wasn't able to download and use Poland based apps.

Long history, in short, most of the time developers or companies (bank and government organizations i.e.) put apps on the market which are allowed to download only by the account/user which belongs to that country. 

Today, when I need to change my account to use Poland as a country wasn't easy as expected :) That is why I decided to share easy steps how I did it with you.

Unable to Find Valid Certification Path to Requested Target while using Java on Server

SSL Certificates are small data files that digitally bind a cryptographic key to an organization’s details. 
When installed on a web server, it activates the padlock and the https protocol and allows secure connections from a web server to a browser. 

Typically, SSL is used to secure credit card transactions, data transfer, and logins, and more recently is becoming the norm when securing browsing of social media sites.

Even now, most the browsers show sites as "Not Secure" when they don't have SSL certificates

Maybe you also faced an issue like below: