Quick Access Selection | Carles Mateo

Quick Access to my selection Last Update: 2021-10-21 23:08:20 IST (Irish Standard Time) Unix epoch: 1634854100

Cloud Computing

Operations Engineering/DevOps/SRE

Engineering

Miscellaneous

Upgrading Amazon AWS EC2 Ubuntu 18.04 LTS to Ubuntu 20.04 LTS
Upgrading Amazon EC2 Instance with LAMP from Ubuntu Linux 18.04 LTS to version 20.04 LTS.
2021-June Views: 478 views
How to recover access to your Amazon AWS EC2 instance if you loss your Private Key for SSH
Procedure to get access to an Amazon AWS EC2 Instance and its Data, after you have lost your SSH Private Key and access to the instances using that Key pair.
2020-Sept Views: 2,985 views
Benchmarking Google Cloud Compute Engine (2015)
The analysis I did from Google Compute Engine, in my project CMIPS, when google launched their GCE in beta.
Paul Nash wrote me and I helped all the Cloud Team to fix some problems. :)
This analysis is a bit old however contains some interesting information.
2015-Jan
Comparison of Cloud Provider’s Instances performance
From my CMIPS (Cloud Million Instructions per second) a performance comparison of different Instances, from different Cloud Providers, compared to bare metal as well.
Is old, from 2015, however brings very valuable information.
2015-Jan
The Cloud is for Scaling
The Cloud is for Startups, and for Scaling and for Enterprises. Nothing more. 2013-Sept Views: 8,894 views

Linux Command Line tools I usually install (if they are not on the system)
2016-March Views: 10,478 views
Troubleshooting upgrading and loading a ZFS module in RHEL7.4 2018-July Views: 9,313 views
A sample forensic post mortem for a iSCSI Initiator (client) that had connectivity problems to the Server (Troubleshooting) 2019-August Views: 4,567 views
Creating a content filter for Postfix in PHP 2016-June Views: 22,588 views
Stopping definitively the massive Distributed DoS attack 2015-Feb Views: 24,691 views
Stopping and investigating a DoS XMLRPC attack 2014-August Views: 143,454 views
Stopping a BitTorrent DDoS attack 2015-January Views: 63,993 views
Troubleshooting a shell prompt irresponsible/that locks intermittently 2020-April Views: 3,485 views
Post-Mortem: The mystery of the duplicated Transactions into an e-Commerce
2020-Nov Views: 3,367 views
Adding a swapfile on the fly as a temporary solution for a Server with few memory 2020-Nov Views: 854 views
Swap, swappiness, Servers not responding
2021-May Views: 1,166 views

Performance of Several Languages
2014-Oct Views: 172,207 views
CSort Multithread versus Quicksort (Java) 2017-March Views: 18,486 views
CSort my algorithm that heavily beats Quicksort (Java) 2015-May Views: 12,952 views

How is: Working in Cork for IT Engineers
2020-Feb Views: 4,039 views
How is: Working in Barcelona for IT Engineers
2020-Feb Views: 3,873 views
A mistake that all the universities are doing
2018-Jun Views: 5,676 views
Some advice for WFH (Working from Home/Remotely)
2020-May Views: 5,772 views
News from the Blog 2021-10-21
2021-October Views: 33 views
News from the Blog 2021-10-10
2021-October Views: 85 views
News from the Blog 2021-09-07
2021-September Views: 222 views
News from the Blog 2021-08-16
2021-August Views: 381 views
News from the Blog 2021-07-23
2021-August Views: 400 views
News from the Blog 2021-07-01
2021-August Views: 478 views
News from the Blog 2021-05-22
2021-May Views: 1,217 views
News from the Blog 2021-03-21
2021-Mar Views: 1,389 views
News from the Blog 2021-03-04
2021-Mar Views: 1,317 views
News from the blog 2021-02-10
2021-Feb Views: 562 views
News from the blog 2021-01-11
2021-Jan Views: 1,359 views
News from the blog 2020-12-16
2020-Dec Views: 1,436 views
News from the blog 2020-11-23
2020-Nov Views: 1,395 views
News from the blog 2020-11-11
2020-Nov Views: 2,050 views
News from the blog 2020-11-03
2020-Nov Views: 2,382 views
News from the blog 2020-10-16
2020-Oct Views: 2,394 views
News from the blog 2020-09-21
2020-Sept Views: 2,692 views
News from the blog 2020-08-19
2020-Aug Views: 2,229 views
News from the blog 2020-08-10
2020-Aug Views: 2,262 views
News from the blog 2020-07-19
2020-July Views: 2,144 views

Python

PHP

Java

Bash

Lesson 0, learning to code in Python for non programmers
2020-March Views: 3,939 views
Video for beginners: Python for, range, lists, dicts
2021 July Views: 618 views
Learn to do Unit Testing with pytest in Python 3.
2021-October Views: 82 views
A handy trick command line to get the usages of our Python Methods in the code
2019-July Views: 3,683 views

A small Python + MySql + Docker program as a sample (plus LAMP PHP sample).
2021-July Views: 1,146 views

A simple Flask Application, a Star Wars game in Python and Docker.
2021-July Views: 591 views

A simple Python Tic Tac Toe game.
2021-September Views: 207 views

Some weird things from Python 3 that you may not know.
2021-September Views: 174 views

Generating a Word Cloud of Tags in Python.
2021-September Views: 158 views

Some graphics with matplotlib.
2021-October Views: 132 views

Web Top – Displaying top with Python 3 Web Server and carleslibs.
2021-October Views: 88 views

MT Notation prefix variables system for Python
Last Update: 2021-07-15
Views: 3,626 views

My PHP Script to see WordPress Posts and Views ordered by Views
2021-August Views: 536 views
Improving performance in PHP
2014-August Views: 23,345 views
Catalonia Framework PHP Open Source
MT Notation prefix variables system for PHP
From: 2014-July Last Update: 2021-07-15 Views: 4,423 views

Java validation Classes for Keyboard
2020-Dec Views: 22,783 views
MT Notation prefix variables system for Java
From: 2017-March Views: 3,314 views

compress_old.sh A simple Bash script to compress files in a directory, older than n days
2021-March Views: 1,479 views
A simple script to upload a pypi/pip package
2021-March Views: 1,393 views

Docker

Commodity Hardware

ZFS

Architecture

Refreshing settings in a Docker immutable image with Python and Flask
2020-May Views: 3,583 views
In March 2021, Why I propose you to use Python 3.8, at least, for your Internal Automation Tools in Docker Containers and Ubuntu 20.04 LTS 2021-March Views: 1,623 views
Solving the problem when running a Docker Container: standard_init_linux.go:190: exec user process caused “no such file or directory” 2021-March Views: 2,356 views
Adding my Server as Docker, with PHP Catalonia Framework, explained
2019-July Views: 5,138 views
A base Dockerfile for my Jenkins deployments 2021-March Views: 1,768 views
Migrating some Services from Amazon AWS EC2 to Digital Ocean, using Docker 2021-Aug Views: 840 views
Have a cheap Ubuntu in your Windows or Mac with Docker 2021-September Views: 441 views

Dealing with Performance degradation on ZFS (DRAID) Rebuilds when migrating from a single processor to a multiprocessor platform (Troubleshooting explained)
2019-June Views: 4,304 views
Solving a persistent MDRAID and ZFS problem in RHEL7.4 (Dual Port SAS drives)
2018-Oct Views: 3,999 views
Simulating a SAS physical pull out of a drive
2019-March Views: 3,894 views
Create a small partition on the drives for tests
2019-April Views: 4,048 views

Adding a RAMDISK as SLOG ZIL to ZFS
2020-August Views: 4,735 views
Some handy tricks for working with ZFS
2019-June Views: 4,085 views
ZFS Improving iSCSI for Block Devices (trick for Volumes)
2018-Oct Views: 6,642 views
Creating a compressed filesystem with Linux and ZFS
2018-Sept Views: 4,859 views
Compiling ZFS with RHEL6.10
2019-August Views: 3,751 views
My talk at OpenZFS 2018 about DRAID (San Francisco, US) 2018-Sept Views: 5,275 views
Extend existing Single ZFS disk with a mirror without losing the Data on the existing drive
2021-Jan Views: 2,051 views

Resources for Microservices and Business Domain Solutions for the Cloud Architect / Microservices Architect
2019-Oct Views: 4,183 views
Scaling PhantomJS with PHP
2015-June Views: 20,054 views
Improving Performance in PHP (Stack and tricks)
2014-August Views: 23,345 views
Begin developing in Cassandra in Java, PHP or Python
2014-July Views: 10,952 views

Windows

Raspberry Pi

Relational Databases

Solving Windows 10 PRO running Active Directory as Domain Admin
2021-Jan Views: 1,420 views
Install Windows Subsystem for Linux, WSL 2 on Windows 10 64 bit, with Ubuntu, solution to error WslRegisterDistribution failed with error: 0x80070057
2021-Jan Views: 11,048 views
Programs I use for Windows in my Workstations
2019-Sept Views: 2,099 views
Using Windows 10 Appliance in Ubuntu Virtual Box 4.3.10 and later versions
2015-August Views: 31,226 views
Reinstall PIP only in Windows 10 after it got removed
2021-March Views: 1,321 views

Install a Media Player on the Raspberry Pi 4
2020-March Views: 2,071 views

Raspberry Pi 3 and OMSC Media Player
2015-April Views: 11,977 views

Solving the problem GPIO.setup(self.number, GPIO.IN, self.GPIO_PULL_UPS[self._pull]) RuntimeError: Not running on a RPi! in Ubuntu 20.04LTS
2021-Feb Views: 2,615 views

Solving Oracle error ORA 600 [KGL-heap-size-exceeded]
2021-Febreruary Views: 4,931 views

Python Open Source Utilities

Bash Open Source Utilities

My Tech Talks

My Books

CTOP.py SysAdmin tool to get all the System Information at a glance
2020-Jan Views: 6,676 views

Simple sample to print colors in Terminal
2018-May Views: 7,142 views

LDAPGUI.py a simple Python GUI application that queries LDAP
2020-Jun Views: 3,585 views

cmemgzip.py compress logs in memory and replace uncompressed files by .gz when drive has no space left
2021-Feb Views: 1,513 views

checkswap.py Monitor the impact of swap memory pages on a live system.
2021-May Views: 1,166 views

Carleslibs v. 1.0.2 Python Open Source package.
2021-July (Updated 2021-August)Views: 573 views

count_repeated_pattern_in_logs.sh
A easy way to see errors that are repeating, e.g.: NFS/iSCSI timeouts.
2020-May Views: 3,753 views
backup_partition_in_files.sh
Compressing an unmounted partition to a image file while compressing on the fly, and breaking into 1GB gz files.
Also explains in a funny way about STDIN, STDOUT, STDERR and methodology investigating in deep.
2020-May Views: 3,924 views
iostat_bandwidth.sh
See the aggregated bandwidth used by all the drives, and the maximum speed achieved.
2020-Aug Views: 3,007 views
count_lines_of_code.sh
Count the lines in .py Python source files recursively and displays individual and total results.
2021-Jan Views: 1,875 views
One line script to log the temperature of HDDs and CPUs in Ubuntu
2021-Jan Views: 1,458 views

My talk at OpenZFS 2018 about DRAID (San Francisco, US)

2018-Sept Views: 5,275 views
Google Compute Engine Talk for Group Google Developers Cork, Ireland

How to do autoscaling from 0 using Google Cloud.
2019-Feb Views: 3,672 views

Buy my books:
Python 3 Combat Guide
Pages: 403 DIN-A4 PDF DRM-free
Accompanying Source Code: https://gitlab.com/carles.mateo/python_combat_guide
Last Update: v.1.05 2021-10-20

Assemble and upgrade your PC and laptops
Pages: 107 DIN-A4 PDF DRM-free
Last Update: v.0.17 2021-01-13

ZFS on Ubuntu 20.04 LTS
Pages: 140 DIN-A4 PDF DRM-free
Covers ZFS 0.8.3 version. Shows tricks, fix errors, secrets and commands against real systems with LSI Controllers, SAS SLOG ZIL devices, SATA, SSD…
Last Update: v.0.24 2021-08-02

Python 3 Exercises for Beginners
Pages: 195 DIN-A4 PDF DRM-free
Last Update: v.40 2021-10-12

Docker Combat Guide
Pages: 89 DIN-A4 PDF DRM-free
Last Update: v.9 2021-10-19

Click here to list all the articles published, sorted by number of Views.