OctoPrint with multiple 3D printers
One of the most useful tools when managing a 3D printer is OctoPrint, since among several things it allows you to manage your printer from a web interface, ...
3dPrint
AWS
AWS (re)Certified Solutions Architect - Professional
This article is to share my experience with the AWS Certified Solutions Architect - Professional (recertification) exam:
Terraform module for AWS ECR
I share here another Terraform module I published as open source code, which allows you to create registries in AWS ECR.
Terraform module for Secrets Manager
I just published a Terraform module called terraform-aws-secrets-manager at Github, so I decided to share it as well in the public Terraform Registry.
Terraform module for Amazon CodeBuild
I just published a Terraform module called terraform-aws-codebuild at Github, so I decided to share it as well in the public Terraform Registry.
Terraform module for Amazon Route53 Resolver Rules
I wrote this module to be able to create AWS Route53 Resolver rules for outbound endpoints in a more convenient way.
Terraform module for Amazon Cognito User Pools
I share here another Terraform module that I just published as open source, which allows you to create Amazon Cognito User Pools with its attributes and re...
Terraform module for Amazon Elasticsearch Service
I share here another Terraform module that I just published as open source, which allows you to create Amazon Elasticsearch Service clusters. The module is...
Terraform module for AWS Backup
I just published my first open-sourced Terraform module called terraform-aws-backup at Github, so I decided to share it as well in the public Terraform Reg...
Alexa skill: Días Festivos
Today I received the approval of the publication of my first Alexa skill in Spanish. The name of the skill is Días Festivos, and lets you know when is the ...
How to migrate Terraform remote tfstates
In Terraform you can rename and move resources and modules in the same state, whether it is local or remote. But when you want to migrate resources or modu...
Dynamic blocks in Terraform 0.12.x
Some time ago I wrote about how to make dynamic blocks in Terraform 0.11.x, that although it solved the problem, it generated others because it wasn’t an o...
Guru of the week
Last week I answered this Guru of the Week question and I won!. Some questions can be tricky, but the key is to think what service or technology solves the...
AWS Certified Alexa Skill Builder - Specialty
In January I took the beta test for AWS Certified Alexa Skill Builder Specialty and yesterday I got the results. I had been programming Alexa Skills and wh...
Using Alexa ASK SDK from Lambda Layers
Lambda Layers Lambda Layers was recently incorporated into AWS, which basically allows you to share libraries and codes between Lambda functions. This make...
AWS CodePipeline with Bitbucket
At work I needed to deploy an application using AWS CodePipeline but the repository where the code is located is in Bitbucket. This was an inconvenient tas...
AWS Certified DevOps Engineer - Professional
I recently approved the AWS Certified DevOps Engineer - Professional certification and wanted to leave my comments on the exam:
Dynamic configuration blocks in Terraform
One of the things I had to resolve was the fact that in Terraform there are configuration blocks that, depending on the options may have different paramete...
Getting AWS Logs from the CLI
One of the company’s developers asked me if there was any way to view the Lambda function logs from the command line, so I wouldn’t have to go into the AWS...
echo dot
Since I’m working on some projects in the company with Alexa, I got a echo dot.
A Cloud Guru Member
I received my swag: t-shirt and sticker pack from A Cloud Guru this week. How I got these items? I became a member and now I have access to all courses and...
AWS Certified Developer - Associate
Last month I approved the AWS Certified Developer- Associate certification and want to leave my comments regarding the exam:
AWS Certified SysOps Administrator - Associate
I just approved the AWS Certified SysOps Administrator - Associate certification and want to leave my comments regarding the exam:
Using ASG Lifecycle hooks to trigger Lambda functions
Recently I needed to execute some actions after a EC2 instance was created by an Auto Scaling Group. At first a thought in using the userdata or cloud-init...
How to get the latest Ubuntu AMI
Recently I needed to get the latest AMI for Ubuntu Trusty 14.04 Ubuntu with ENA support enabled to build an image using Packer so I did a research and foun...
AWS Certified Solutions Architect - Professional
I just approved the AWS Certified Solutions Architect - Professional certification and want to leave my comments regarding the exam:
Using AWS Lambda to copy RDS snapshots between regions
At work we needed to make MySQL database on RDS backups between regions without having a running instance in the destination region, I mean, no read replica...
AWS Certified Solutions Architect
At work we are migrating many services to Amazon’s cloud, therefore we need to formalize the AWS knowledge. In that sense we found an online course site ca...
Alexa
Alexa skill: Días Festivos
Today I received the approval of the publication of my first Alexa skill in Spanish. The name of the skill is Días Festivos, and lets you know when is the ...
Using Alexa ASK SDK from Lambda Layers
Lambda Layers Lambda Layers was recently incorporated into AWS, which basically allows you to share libraries and codes between Lambda functions. This make...
echo dot
Since I’m working on some projects in the company with Alexa, I got a echo dot.
Android
Including Apache HTTP Client on Android Studio
In order to use Apache HTTP Client (httpclient y httpmime) in Eclipse I used to download the Android port and then include the dependencies specifying th...
Programming Mobile Applications for Android Handheld Systems course
Coursera just sent me the certificate for completing with distinction the course Programming Mobile Applications for Android Handheld Systems. This course ...
My first application on Android: BatteryReporter
From a while I wanted to learn how to develop Android applications and when I saw that open a course at Coursera for developing Android appslications so I t...
Bitbucket
AWS CodePipeline with Bitbucket
At work I needed to deploy an application using AWS CodePipeline but the repository where the code is located is in Bitbucket. This was an inconvenient tas...
Posting from Jekyll to GitHub Pages with Bitbucket Pipeline
I had some security issues with WordPress so I decided to changed my blog to something static and served from GitHub Pages. But the new site had to meet so...
CentOS
How to update Linux time zones
On May 1st, Venezuela will change its time zone to UTC-4, therefore in Linux you must update your tzdata package to be ready to this change. To do so just j...
How to install VMWare Tools on Red Hat and CentOS
If you need to install VMWare Tools on virtual machines running Red Hat or CentOS as operating system, you can follow the procedure described next: Proced...
CodePipeline
AWS CodePipeline with Bitbucket
At work I needed to deploy an application using AWS CodePipeline but the repository where the code is located is in Bitbucket. This was an inconvenient tas...
Codebuild
AWS CodePipeline with Bitbucket
At work I needed to deploy an application using AWS CodePipeline but the repository where the code is located is in Bitbucket. This was an inconvenient tas...
CompTIA
Novell certification
Talking with a friend of mine I told him that LPI certifications validates a couple of Novell0’s certifications which in deed are just an incentive to con...
Coursera
Programming Mobile Applications for Android Handheld Systems course
Coursera just sent me the certificate for completing with distinction the course Programming Mobile Applications for Android Handheld Systems. This course ...
Course Creative, Serious and Playful Science of Android Apps
Recently I received the awards for the Android course Creative, Serious and Playful Science of Android Apps lectured by Lawrence Angrave from the Universi...
Debian
Mouse Logitech MX Anywhere 2s Flounder on Linux
I bought a Logitech Mx Anywhere 2s Flounder mouse too free up a USB port, and be able to configure more buttons compared to the mouse I had.
How to update Linux time zones
On May 1st, Venezuela will change its time zone to UTC-4, therefore in Linux you must update your tzdata package to be ready to this change. To do so just j...
Installing Java on Debian
If you need to install Oracle Java on Debian, you can follow the next steps once the binary file had been downloaded from Oracles’s download page:
Debmirror problem: gpgv: Can’t check signature: public key not found
I have a mirror where Debian and Ubuntu packages are hosted, so people in the internal network can upgrade their software using this mirror. But the other...
Installing Raspbmc successfully
A friend recommended me this distro for running XBMC which was released by one of the developers of the XBMC project with specific optimizations to run on ...
How to build a Debian packge in 3 steps
There are several ways of making a Debian package. In this article you will learn how to create it using equivs tools, to create a simple package (for exam...
XBMC on Raspberry Pi with Raspbian
If you want to install XBMC on your Raspberry Pi using Raspbian and got dependency problems, you can download it from this repo by adding the following lin...
Mobile repository on Debian
If by chances you have a slow connection but in another place have a better connection (school, university, work, etc.) and have a computer with Debian whic...
Kernel compiling the old-fashion way
There are several reasons for compiling a kernel. For instance you might be interested in adding support for a new hardware or functionality, or for tuning...
Installing VirtualBox Guest Additions
After installing your virtual machine in VirtualBox you should install the Guest Additions…what is that for? It lets you use your virtual machine at fullsc...
Why not to use Windows?
I’ve installed my sister’s computer at least four times with Windows XP because it got viruses…I hope this time she considers to use Linux (they have it in...
apt vs aptitude
Both, apt (apt-get, apt-cache) and aptitude are commands for package administration from the text on Debian and spin-off distros like Ubuntu. In fact, both...
Docker
Posting from Jekyll to GitHub Pages with Bitbucket Pipeline
I had some security issues with WordPress so I decided to changed my blog to something static and served from GitHub Pages. But the new site had to meet so...
EKS
Helm 3 local repo
In Helm 3 the support of helm serve command was removed due to some design issues, therefore if you need a similar tool you have to install helm servecm p...
Certified Kubernetes Administrator (CKA)
This post describes my experience and recommendations for tackling the Certified Kubernetes Administrator (CKA) exam by The Linux Foundation.
Certified Kubernetes Application Developer (CKAD)
I recently approved the Certified Kubernetes Application Developer (CKAD) exam by The Linux Foundation, so I decided to share my experience and some recomm...
Gihub
Posting from Jekyll to GitHub Pages with Bitbucket Pipeline
I had some security issues with WordPress so I decided to changed my blog to something static and served from GitHub Pages. But the new site had to meet so...
Git
Posting from Jekyll to GitHub Pages with Bitbucket Pipeline
I had some security issues with WordPress so I decided to changed my blog to something static and served from GitHub Pages. But the new site had to meet so...
GitLab
Gitlab full Postgresql backup and restore
GitLab can be used with Postgresql as its database engine (beside MySQL), and all come ready to make backups and restores of its databases and git reposi...
HashiCorp
HashiCorp Certified: Terraform Associate
HashiCorp recently announced the general availability of some of their Cloud Certifications like Terraform and Vault (and others to come like Consul). As ...
HumberOS
Samsung Galaxy Tab P1000 with Android 4.3 – CyanogenMod 10.2
One more time I wanted to give another breath to my Samsung Galaxy Tab 7, because prices here in Venezuela are not encouraging, so I decided to instal...
Java
Installing Java on Debian
If you need to install Oracle Java on Debian, you can follow the next steps once the binary file had been downloaded from Oracles’s download page:
Kubernetes
Helm 3 local repo
In Helm 3 the support of helm serve command was removed due to some design issues, therefore if you need a similar tool you have to install helm servecm p...
Certified Kubernetes Administrator (CKA)
This post describes my experience and recommendations for tackling the Certified Kubernetes Administrator (CKA) exam by The Linux Foundation.
Certified Kubernetes Application Developer (CKAD)
I recently approved the Certified Kubernetes Application Developer (CKAD) exam by The Linux Foundation, so I decided to share my experience and some recomm...
LPI
LPIC-2 certification
At last my certificate and card ID for LPIC-2 have arrived, which involve exams 201 and 202. Unlike the LPIC-1 certification, it took more time to arrive ...
Novell certification
Talking with a friend of mine I told him that LPI certifications validates a couple of Novell0’s certifications which in deed are just an incentive to con...
LVM
How to extend a volume on LVM
Sometimes it is necessary to extend a logical volume, expanding the physical volume where it is hosted. If this is the case, you can follow this example e...
How to move a physical volume on LVM
If you need to move data from one disk to another one you could think in copying the data with cp, rsync, or any other tool, and then umount the partition,...
Logical Volume Manager (LVM)
In the traditional disk partitioning scheme, administrators plan ahead the use of each partition. For instance, a laptop with 120 GB hard drive, 1 GB RAM ...
Lambda
Using Alexa ASK SDK from Lambda Layers
Lambda Layers Lambda Layers was recently incorporated into AWS, which basically allows you to share libraries and codes between Lambda functions. This make...
Using AWS Lambda to copy RDS snapshots between regions
At work we needed to make MySQL database on RDS backups between regions without having a running instance in the destination region, I mean, no read replica...
Layers
Using Alexa ASK SDK from Lambda Layers
Lambda Layers Lambda Layers was recently incorporated into AWS, which basically allows you to share libraries and codes between Lambda functions. This make...
Linux
OctoPrint with multiple 3D printers
One of the most useful tools when managing a 3D printer is OctoPrint, since among several things it allows you to manage your printer from a web interface, ...
Mouse Logitech MX Anywhere 2s Flounder on Linux
I bought a Logitech Mx Anywhere 2s Flounder mouse too free up a USB port, and be able to configure more buttons compared to the mouse I had.
Debmirror problem: gpgv: Can’t check signature: public key not found
I have a mirror where Debian and Ubuntu packages are hosted, so people in the internal network can upgrade their software using this mirror. But the other...
Daemontools or how to relaunch a process if it dies
Maybe you have been in the situation where a process (program or service) in the system dies or ends abruptly and needs to be relaunched no matter what. Y...
Why not to use Windows?
I’ve installed my sister’s computer at least four times with Windows XP because it got viruses…I hope this time she considers to use Linux (they have it in...
Linux∫
Batocera & iPhone hotspot
In my previous post, I mentioned that I’m using the Anbernic 35xxh handheld for retrogaming. This device offers a nice, horizontal, compact, and practical f...
Anbernic 35xxH and Batocera
Today, the market is flooded with a variety of handheld devices for retro emulation, originating from several Chinese companies such as Retroid, Powkiddy, a...
Mac
PaperLike Pencil Grips
I’ve been using my iPad for a while to take notes with the Apple Pencil and I decided to write this article to tell you about a product that has pleasantly ...
iPad Pro as portable workstation
It’s been a while since I posted on the blog, first because I couldn’t find something interesting to share and second because there wasn’t much spare time (...
Management
iPad Pro as portable workstation
It’s been a while since I posted on the blog, first because I couldn’t find something interesting to share and second because there wasn’t much spare time (...
OctoPi
OctoPrint with multiple 3D printers
One of the most useful tools when managing a 3D printer is OctoPrint, since among several things it allows you to manage your printer from a web interface, ...
OpenWrt
Setting OpenVPN on OpenWrt
Due to my home router is connected 24×7 it makes it the ideal place to install a VPN server. In my case I had installed OpenWrt on my router TP-LINK TL-WR1...
PHP
Enabling HTML5 for Blipblip.tv in WordPress plugin Video Sidebar Widgets
The problem Visiting my blog from a tablet I noticed that theBlip.Tv videos I set in _Video Sidebar Widgets _were not shown. Doing a research I realized the...
Packer
How to get the latest Ubuntu AMI
Recently I needed to get the latest AMI for Ubuntu Trusty 14.04 Ubuntu with ENA support enabled to build an image using Packer so I did a research and foun...
Postgresql
Gitlab full Postgresql backup and restore
GitLab can be used with Postgresql as its database engine (beside MySQL), and all come ready to make backups and restores of its databases and git reposi...
Python
Pyenv to the rescue
I recently switched to Debian testing again so as to be able to use Python 3.6 among other things. I started working with this version, creating my Lambda ...
RDS
Using AWS Lambda to copy RDS snapshots between regions
At work we needed to make MySQL database on RDS backups between regions without having a running instance in the destination region, I mean, no read replica...
Raspberry
OctoPrint with multiple 3D printers
One of the most useful tools when managing a 3D printer is OctoPrint, since among several things it allows you to manage your printer from a web interface, ...
XBMC on Raspberry Pi with Raspbian
If you want to install XBMC on your Raspberry Pi using Raspbian and got dependency problems, you can download it from this repo by adding the following lin...
RaspberryPi
Installing Raspbmc successfully
A friend recommended me this distro for running XBMC which was released by one of the developers of the XBMC project with specific optimizations to run on ...
Where to put my Raspberry Pi?
Due to I wanted to use my Raspberry Pi as a media center but I didn’t want to put a lot of devices on my nightstand I came up with this idea. My Raspberry,...
How to run Raspberry Pi from a USB hard drive
I’ve been using my Raspberry Pi with a 4 GB - class 4 SD card Kingston until it decided to die (since I burn the image the first time that SD card was a l...
Raspbian
How to run Raspberry Pi from a USB hard drive
I’ve been using my Raspberry Pi with a 4 GB - class 4 SD card Kingston until it decided to die (since I burn the image the first time that SD card was a l...
RedHat
How to update Linux time zones
On May 1st, Venezuela will change its time zone to UTC-4, therefore in Linux you must update your tzdata package to be ready to this change. To do so just j...
How to install VMWare Tools on Red Hat and CentOS
If you need to install VMWare Tools on virtual machines running Red Hat or CentOS as operating system, you can follow the procedure described next: Proced...
Retroemulation
Batocera & iPhone hotspot
In my previous post, I mentioned that I’m using the Anbernic 35xxh handheld for retrogaming. This device offers a nice, horizontal, compact, and practical f...
Anbernic 35xxH and Batocera
Today, the market is flooded with a variety of handheld devices for retro emulation, originating from several Chinese companies such as Retroid, Powkiddy, a...
Samsung
Samsung Galaxy Tab P1000 with Android 4.3 – CyanogenMod 10.2
One more time I wanted to give another breath to my Samsung Galaxy Tab 7, because prices here in Venezuela are not encouraging, so I decided to instal...
SuSE
How to update Linux time zones
On May 1st, Venezuela will change its time zone to UTC-4, therefore in Linux you must update your tzdata package to be ready to this change. To do so just j...
SysAdmin
How to move a physical volume on LVM
If you need to move data from one disk to another one you could think in copying the data with cp, rsync, or any other tool, and then umount the partition,...
Debmirror problem: gpgv: Can’t check signature: public key not found
I have a mirror where Debian and Ubuntu packages are hosted, so people in the internal network can upgrade their software using this mirror. But the other...
How to create a ramdisk in Linux
A ramdisk is like a disk partition but running directly from the system’s RAM. All data read and written will be faster, and as drawback all data will be e...
How to build a Debian packge in 3 steps
There are several ways of making a Debian package. In this article you will learn how to create it using equivs tools, to create a simple package (for exam...
How to make big file system partitions
Sometimes you’ll see on hard drives some inconsistencies with size, used value and the available space. The problem occurs when the operating system report...
Daemontools or how to relaunch a process if it dies
Maybe you have been in the situation where a process (program or service) in the system dies or ends abruptly and needs to be relaunched no matter what. Y...
Logical Volume Manager (LVM)
In the traditional disk partitioning scheme, administrators plan ahead the use of each partition. For instance, a laptop with 120 GB hard drive, 1 GB RAM ...
Kernel compiling the old-fashion way
There are several reasons for compiling a kernel. For instance you might be interested in adding support for a new hardware or functionality, or for tuning...
Installing VirtualBox Guest Additions
After installing your virtual machine in VirtualBox you should install the Guest Additions…what is that for? It lets you use your virtual machine at fullsc...
apt vs aptitude
Both, apt (apt-get, apt-cache) and aptitude are commands for package administration from the text on Debian and spin-off distros like Ubuntu. In fact, both...
SystemAdmin
How to extend a volume on LVM
Sometimes it is necessary to extend a logical volume, expanding the physical volume where it is hosted. If this is the case, you can follow this example e...
Terraform
Terraform module for AWS ECR
I share here another Terraform module I published as open source code, which allows you to create registries in AWS ECR.
Terraform module for Secrets Manager
I just published a Terraform module called terraform-aws-secrets-manager at Github, so I decided to share it as well in the public Terraform Registry.
HashiCorp Certified: Terraform Associate
HashiCorp recently announced the general availability of some of their Cloud Certifications like Terraform and Vault (and others to come like Consul). As ...
Terraform module for Amazon CodeBuild
I just published a Terraform module called terraform-aws-codebuild at Github, so I decided to share it as well in the public Terraform Registry.
Terraform module for Amazon Route53 Resolver Rules
I wrote this module to be able to create AWS Route53 Resolver rules for outbound endpoints in a more convenient way.
Terraform module for Amazon Cognito User Pools
I share here another Terraform module that I just published as open source, which allows you to create Amazon Cognito User Pools with its attributes and re...
Terraform module for Amazon Elasticsearch Service
I share here another Terraform module that I just published as open source, which allows you to create Amazon Elasticsearch Service clusters. The module is...
Terraform module for AWS Backup
I just published my first open-sourced Terraform module called terraform-aws-backup at Github, so I decided to share it as well in the public Terraform Reg...
How to migrate Terraform remote tfstates
In Terraform you can rename and move resources and modules in the same state, whether it is local or remote. But when you want to migrate resources or modu...
Dynamic blocks in Terraform 0.12.x
Some time ago I wrote about how to make dynamic blocks in Terraform 0.11.x, that although it solved the problem, it generated others because it wasn’t an o...
Dynamic configuration blocks in Terraform
One of the things I had to resolve was the fact that in Terraform there are configuration blocks that, depending on the options may have different paramete...
Working with Terraform modules
In this post you’ll see how reuse your Terraform code using modules to avoid writing the same code over and over. Also you will lear how to version your mod...
Ubuntu
How to get the latest Ubuntu AMI
Recently I needed to get the latest AMI for Ubuntu Trusty 14.04 Ubuntu with ENA support enabled to build an image using Packer so I did a research and foun...
How to update Linux time zones
On May 1st, Venezuela will change its time zone to UTC-4, therefore in Linux you must update your tzdata package to be ready to this change. To do so just j...
Debmirror problem: gpgv: Can’t check signature: public key not found
I have a mirror where Debian and Ubuntu packages are hosted, so people in the internal network can upgrade their software using this mirror. But the other...
Mobile repository on Debian
If by chances you have a slow connection but in another place have a better connection (school, university, work, etc.) and have a computer with Debian whic...
Epson Stylus CX5600 all-in-one scanner on Linux
I convinced my sister to use Linux after the fourth Windows XP installation (due to viruses). But she complained about not having installed her Epson Stylu...
Redemption: Bye bye Windows XP…Howdy Ubuntu 9.10
As I said in other post , I have installed Windows on my sister’s computer at least four times due to viruses. I installed it one more time and I also inst...
VMWare
How to install VMWare Tools on Red Hat and CentOS
If you need to install VMWare Tools on virtual machines running Red Hat or CentOS as operating system, you can follow the procedure described next: Proced...
How to install VMWare Tools on Debian 7
Installing VMWare Tool on Debian 7 is not that different than, for example, installing VirtualBox’s Guest Additions. In essence you have to have the system...
VirtualBox
How to load the VirtualBox driver
If for any reason (for instance Genymotion complaining about not finding VirtualBox) and you need to reload the VirtualBox driver keep in mind that the scr...
Installing VirtualBox Guest Additions
After installing your virtual machine in VirtualBox you should install the Guest Additions…what is that for? It lets you use your virtual machine at fullsc...
WordPress
Enabling HTML5 for Blipblip.tv in WordPress plugin Video Sidebar Widgets
The problem Visiting my blog from a tablet I noticed that theBlip.Tv videos I set in _Video Sidebar Widgets _were not shown. Doing a research I realized the...
echo
echo dot
Since I’m working on some projects in the company with Alexa, I got a echo dot.
iPad
PaperLike Pencil Grips
I’ve been using my iPad for a while to take notes with the Apple Pencil and I decided to write this article to tell you about a product that has pleasantly ...
k8s
Helm 3 local repo
In Helm 3 the support of helm serve command was removed due to some design issues, therefore if you need a similar tool you have to install helm servecm p...
Certified Kubernetes Administrator (CKA)
This post describes my experience and recommendations for tackling the Certified Kubernetes Administrator (CKA) exam by The Linux Foundation.
Certified Kubernetes Application Developer (CKAD)
I recently approved the Certified Kubernetes Application Developer (CKAD) exam by The Linux Foundation, so I decided to share my experience and some recomm...
qBittorrent
How to enable the Web UI on qBittorrent
If you want to manage your qBittorrent server using a web interface, follow these steps:
qBittorrent Controller for Android
Download application