Devsys

Adding a new display resolution in Linux

Short story. I get a new laptop with Windows 10, so I need to install Linux, installed but… I get 1366x768 as display resolution, but also I don’t get any alternatives with the display manager. So, how I can change the resolution ?

[Apex][Salesforce] How to make a callout with a DML operation in a process builder

For use an Apex Class in a Process Builder, you need to create one method with a this annotation (just one per class):

[Python] Using temporary files

Working with lambda — jupyter, I saw the need to use cumbersome files through s3, which I had no intention of keeping in the file system, they were only temporary.

For that they are tempfile, which allows to create temporary files, with or without…

Important commands in Docker that you should know

Recently we have some troubles with a machine running Docker with some services, Yep it’s a production machine using Docker, but there’s no problem, it’s a stateless service. The trouble was we can’t create more versions of the services (disk…

What means SYN_SENT status in a socket?

Recently we had some problems with a DDoS attack on some machines that execute workers, so I started the task of configuring a firewall (before that, we just removed the machine and created a new one, they are machines without a state).

How to mock a function from module

If you have something like:

var myFunction = function(...){
    ...
};

var myFunction2 = function(...){
    myFunction();
};

exports.myFunction = myFunction;
exports.myFunction2 = myFunction2;

Hide the option menu

Usually when you press the button of options of your cell phone (usually the left button), a menu comes out with the options available (sometimes it only comes out Settings) and this has to do with the menu of options that you want to provide to the application , But in some occasions you do…

Remove the black background in a Scroll

When you do a Scroll in a ListView, the background color turns black and that is not desired.

To change or remove that background color, you need to go into the XML where exists your ListView and add it the next attribute: