The company has provided me and the members of my Team with unlimited Cloud capacity for testing and developing. That’s very nice. I plan to run some nice workloads to asses the performance of several solutions.
I’ve had tons of assignments from the university and with the classes to my students I had no much time.
The Health Department and the universities (CIT and UCC) offered free PCR for the students. I can only say Kudos again for Ireland.
They also offered certain more vulnerable students to vaccinate with Pfizer. More Kudos.
I bought some cases for Raspberry Pi 4.
I’ve bought a Wi-fi Mesh TP-Link to repeat the Wifi signal to zones of the house it was arriving weak. I’m very satisfied with this signal repeater.
This little buddy also provides an Ethernet to connect to a laptop or to a switch.
So far I have only tested with a laptop and works great.
I also released CTOP TAG v.0.8.4 and fixed some bugs in upcoming CTOP v.0.8.5 and added a new feature to display the File Descriptors in use and the Max FDs set in the Kernel. This feature needed some work as I did calculating all the FDs per process but Kernel has another value that comes from /proc/sys/fs/file-nr so I finally implemented this last value, fixed a bug in conversion of units with decimals (KBs without the decimal part) and added Unit Testing to check this cases. I was satisfied to release v. 0.8.5.
I’ve released cmemgzip v. 0.4.1, with colors, and is now a package available to install download from PIP.
pip3 install cmemgzip
I keep teaching to learn to program in Python, to become a Junior BackEnd Developer. To groups and individuals. It is so beautiful and wonderful seeing people transform their minds, their lives and their confidence with the coding skills and being able to chase after better jobs, and so funny and beautiful when this happens in a group dynamic, with friendship, that I’m thinking about assembling a new Group of Students. Those classes are in English but I got some suggestions to do group classes in Spanish. Even if Catalan is speak by around 11 Million people in the world if I have enough requests I’ll gladly do it. if you’re interested reach me in LinkedIn.
I’ve made CTOP.py compatible with Python 2 in order to support legacy Servers.
I’ve updated my book Python Combat Guide as I regularly do. One of the things you’ll find is my script to upload packages to pypi.org very easily so you and the rest of the world can download with pip install package. I’ve added my script in a blog post too.
One person named True as surname gets locked in iCloud due to a bug in their coding, confusing the surname by a boolean property.
I always smile when I find bugs. Bugs are everywhere, but always make me smile when important companies with tons of resources make them.
Today I show this bug received in my email from Glassdoor. :)
You can see how in the email they assume that key will exist, and doesn’t, so a KEY NOT FOUND error is displayed. :)
It is funny, but remembers us the importance of doing our best trying to avoid bugs, working seriously with Methodology, implementing Unit Testing, Functional Testing, having also QA.. all the mechanisms we can, as they can be the last line of defense to avoid releasing bugs to Production.
In the past I taught Java and PHP, and I still help my mates with their Assembler Practices in their Masters, so I could not stop laughing with this:
I’ve recorded two live sessions of Refactoring and Unit Testing working on the project cmemgzip v.0.4. It is basically the exercise of Refactoring a code that is too big, and extracting sections to small methods, and then adding pytest Unit Testing code coverage. I explain the arrays I use for testing a battery of cases instead of few of them. Is an exercise of talking loud what I do normally, so you can understand many small details so subtle as the order of parameters or consistency. I use this material so my students, colleagues learning Unit Testing, and other people can learn and make their code more resilient and high quality.
I’ve implemented a plugin for my Open Source Software CTOP that allows to interact with LED through the Raspberry Pi GPIO.
Plugins architecture in CTOP is something I really like. I had a lot of fun creating it, and is super powerful. Basically I load Python plugins on demand, that are able to register the methods to be called, using hooks. The plugins receives an instance of CTOP itself, injected as dependency, so they have completely visibility over all the status of the machines.
I’ve been developed a new version of CTOP compatible with Python 2.7. I will be adding to master branch and releasing as part of tag 0.8 soon.
I’ve released cmemgzip v.0.3 (stable) and v.0.4 (ongoing) which is a Python 3 Open Source utility like gzip, with the difference that the files are loaded into memory, then compressed in memory, then the original file is deleted and the compressed data is written to a .gz file.
That means that you can use it on systems that have no space left on the disk, as long as you have memory.
Please note, is possible to compress files much bigger than actual size of the memory as the Block size to be compressed can be indicated with parameter -m. Resulting gz file are completely compatible with gzip/gunzip, zcat, etc…
I’ve made a donation to vokoScreen author €25 (around $30 USD).
This is the Software that I’ve been using recently in Linux, and is very useful, specially having several monitors, so I’m thanking the author with a donation.
I’ve been using this Software to record the classes for my students, so I find nice to share the love.
For windows time ago I bought a commercial Software and it doesn’t do more than vokoScreen, which is available for Windows too.
During covid I lowered the price of my books to the minimum allowed by LeanPub, to $5 USD, and I find it so nice when people donate more, that I’m happy to contribute to brilliant authors. I support authors since I started to get my first salary several decades ago.
I’m an author. I create Software and Books. So I think is normal, common sense and healthy that we, developers, value our work and support other authors. :)
Long time ago I wrote an article about zoning and NDS-4600. A colleague asked me for help, as he bought a second hand unit and it was doing tests. I wrote and explained everything, and added this information to my ZFS in Ubuntu book.
I was very happy to see that you keep buying my books. :)
I have updated CTOP.py so now it detects if is running in a Google GCP instance.
So the list of instances/type of virtualization detected is:
I’m working in detecting Raspberry Pi, models running CTOP, and in enabling the plugins system so anybody can easily expand the functionality of ctop.py.
v.0.7.8 Commented annotations and type hinting, to make CTOP compatible with Python 3.5.0. Added Available RAM. Added Google GCP detection. Inform if it doesn't have permissions to decode DMI. Print the userId (numeric) and the User (string), like: 1000 carles or 0 root. Logic for swappiness <= 10 Ok, >10 and <= 30 warning, >30 red (alert). Reduced digits for swap to 2, to avoid confusions.
I have updated my book Python 3 Combat Guide, with another full cycle, step by step, to convert an ugly script that escapes to shell to a nice OOP code with Unit Testing, step by step.
I have updated my book ZFS for Ubuntu 20.04 LTS, adding how to create a pool and Datasets for home, sharing NFS for the Media Player.
If you like Star Wars and the Mandalorian, you may laugh has much as I did with this video:
I continue teaching programming classes to some people, Pyhon and Java.
As you see I’m writing more articles about Windows, Mac Os X, and proprietary Software. Some of my colleagues work in companies and use proprietary Software, so I’ll be writing more articles about those ecosystems. I spend more time now with colleagues working on all kind of projects, and with students that have other problems too, so I help them. However my main focus is Open Source, Architecture, Scaling, programming in Python and Java.
You know I love Linux. I was compiling my own Kernels back in 1995, when it took more than 24 hours in a 386, and working on the first ISPs in Barcelona managing the Linux Systems.
For my computers I prefer Linux, no doubt about it, but many multinationals I worked for have Windows option only for the Laptops and Desktops.
During years I had to deal with sending files to Linux or Unix (HP UX, Sun Solaris…) to process them and getting back the result. Some sort of ETL and Map Reduce in the prehistory of personal computers, taking in count aspects like Networks speeds too, available space, splitting files for processing.
When I was working as Senior Project Manager in Winterthur Insurance, now Axa, I had to run a lot of ETL (Extract Transform Load) for considerably big files, or when I was project manager and later head of department in Volkswagen gedas or later helping Start ups like Privalia. I can tell you that Windows didn’t like you to open editors to work with 1GB text or CSV file, and doesn’t like it, even if your computer has 16GB of Memory, and even if they do the simplicity of Bash scripts and using pipes, grep, awk… is so powerful that is very convenient to have those files processed using Linux.
And honestly is a pain to send back and forth files to a UNIX System just for Data Crunch. And a VM will be slow and use memory, and you have enable some sort of sharing with it so it can access the Data. Not to talk if you need to split the data files in blocks to be processed in parallel by several computers.
There are many solutions, like using Virtual Machines, Docker, external Servers, etc…
WSL allows you to run Linux command line tools inside Windows.
The recommended way to install Ubuntu on WSL is through the Microsoft Store.
The following Ubuntu releases are available as apps on the Microsoft Store:
Ubuntu 16.04 LTS (Xenial) is the first release available for WSL. It supports the x64 architecture only. (offline installer: x64)
Ubuntu 18.04 LTS (Bionic) is the second LTS release and the first one supporting ARM64 systems, too. (offline installers: x64, ARM64)
Ubuntu 20.04 LTS (Focal) is the current LTS release, supporting both x64 and ARM64 architecture.
Ubuntu (without the release version) always follows the recommended release, switching over to the next one when it gets the first point release. Right now it installs Ubuntu 20.04 LTS.
Each app creates a separate root file system in which Ubuntu shells are opened but app updates don’t change the root file system afterwards. Installing a different app in parallel creates a different root file system allowing you to have both Ubuntu LTS releases installed and running in case you need it for keeping compatibility with other external systems. You can also upgrade your Ubuntu 16.04 to 18.04 by running ‘do-release-upgrade’ and have three different systems running in parallel, separating production and sandboxes for experiments.
But if you prefer, instead of using the Windows Store, you can download the appx.
Assuming you used the Windows Store, if you did not reboot and try now to execute it for the first time, or you go to the Command Line and write bash, or open Ubuntu from Windows menu, whatever method you use, you’ll get the abovementioned error.
If that happens to you, just reboot and when you open it will work and will start the install and ask for a user and password:
From here you’re able to update the system, execute the text commands available in Linux, access to the Windows drives, launch htop, git, Python3, apt, wget… copy and paste between windows and Linux terminal, share PATH…
And of course you can run CTOP.py
Take in count that the space reported in / partition is not real, and that you have a 4GB swap.