[SOLVED] - VirtualBox Not Updating Due To Error "Breaks existing package..."

The 'Breaks existing package' error usually happens when you are trying to update VirtualBox from say version 5.0.x to 5.1.x. To resolve this issue you will first have to uninstall VirtualBox. Open your terminal and enter the commands below:

 sudo apt-get purge virtualbox-*  

Now install VirtualBox using the code below. But first find the version number of the latest VirtualBox package available by visiting the following page: https://www.virtualbox.org/wiki/Downloads. When I checked the latest VirtualBox version available was: VirtualBox 5.1.22.

 sudo apt-get update  
 sudo apt-get install virtualbox-5.1.22   

After upgrading VirtualBox you will also have to update your Extension Pack. You can download the Extension Pack from the aforementioned page.

[SOLVED] - Disable Merged CSS & JavaScript using phpMyAdmin in your Magento Installation

If your Magento site is malfunction because of enabling CSS & JavaScript merging and minification, then you can apply the solution explained in the following page: https://magento.stackexchange.com/questions/80765/how-do-i-disable-merged-css-and-js

[SOLVED] - Unable to find expected entry 'universe/source/Sources' in Release file (Wrong sources.list entry or malformed file)

Because of repeatedly getting the following error,
 W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/Release  Unable to find expected entry 'universe/source/Sources' in Release file (Wrong sources.list entry or malformed file); I was unable to update my source list and thus unable to install softwares from the terminal. Finally, today I managed to solved this issue and also was able to update my apt source list.

1. Open your Unity Dash & type update & select 'Softwares & Updates' as shown in the image below:

Click image to enlarge

2. Click 'Download from' and choose 'Other'


3. Click 'Select Best Server'. Ubuntu will take some time to select the best server for you. Accept it.

4. Now try running the software update again. It should work.

5. If it does not go through steps 1-4 again. This time Ubuntu will (hopefully) select a different server as the 'Best server'. Try software update again.
THE KEY IS TO CHANGE THE DOWNLOAD SERVER FROM WHERE UBUNTU UPDATES ITSELF.

- With inputs from: https://askubuntu.com/questions/383644/how-to-solve-wrong-sources-list-entry-or-malformed-file/795941

[SOLVED] - Web Setup Wizard/Component Manager Not Working - Magento 2

The first thing you need to do when you are unable to access your Component Manager page in your Magento 2x installation is to press F12, Click on Console & view the error message displayed there. Please look at the image below:

Click on image to enlarge

The message displayed in red are the error messages(s). With this error message in hand you will begin to get some idea about the direction you need to take to troubleshoot.

Click on image to enlarge

In my case, I copied the link that was causing the Error & tried to view it in the browser. When I did that I got new error messages generated as below:

Click on image to enlarge

This was the error I was getting precisely:

[RuntimeException]                                                                                                                                                                                                      
  Failed to execute git clone --mirror 'git@github.com:rusdragos/m2-weltpixel-backend.git' '/var/www/html/var/composer_home/cache/vcs/git-github.com-rusdragos-m2-weltpixel-backend.git/'  
                                                                                                                                                        

I checked the 'composer.json' file in the Magento root directory and found the above git command and simply removed it. & voila!, my problem got solved.

Carriage returns in PHP

Carriage return is "\r". Mind the double quotes!

If you want to put a line break in your text, while using PHP, and want to render it correctly in different operating system:

• Mac: \r
• Linux/Unix: \n
• Windows: \r\n

Eclipse Lagging While Typing PHP Codes, Java Codes etc in Windows or Linux

If you are experiencing lag and delays while typing your codes in the Eclipse IDE the following simple change in your settings will resolve the issue.

1. Goto Windows
2. Goto Preferences
3. Then suppose you want to resolve the issue for PHP, select PHP
4. Under PHP >> Editor
5. Under PHP >> Editor >> Content Assist
6. Deselect the option 'Enable auto activation', or
7. You may increase the 'Auto activation delay'

Please refer image below if you are still unclear with the above steps: