Thursday, August 23, 2018

How to hibernate with 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.



Monday, April 16, 2018

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.

Sunday, April 15, 2018

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

Maybe you also faced an issue like below

org.springframework.web.client.ResourceAccessException: I/O error on GET request for "https://www.google.com":sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target; nested exception is javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:607) at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:557)

It is because the certificate used by the HTTPS URL doesn’t exist in the Java Keystore. Hence, the SSL validation fails.

Tuesday, June 7, 2016

Openfire Custom database integration steps

Instant messaging (IM) has enjoyed phenomenal success as a person-to-person communication tool; in some instances, it has supplanted email as the preferred means of online communication. Now, developers are using this technology for application-to-person and application-to-application communication.

There are too many IM servers which work with XMPP protocol. Some of them are paid/Enterprise and some of them are OpenSource.

We are using "Openfire" as a IM server for our projects. It is free, open source and java based. Except this advantages it has too many plugins which you can use for free. Openfire is a XMPP server and it has own client application with name "Spark".

Wednesday, June 1, 2016

Youtube/Shazam mp3/mp4 downloader for Android


Do you know how to download music or video from Youtube? Or do you know how to download music/mp3 from shazam on your android device?
If you don't know how download music from youtube or shazam on android then you should read this post :)


We have developed 2 applications by name YouMp34 and ShazaMusic which allow you to download from youtube and shazam for free.
Both of this applications is free and only for android users. You can view and download it from our official web site www.yoump34.com


We'll be happy to grow together :)