Chronicles of Technology (Page 6)

Conda: Environment configuration

Conda: Environment configuration

With a high probability, you own a powerful computing device that could be used as a standalone system for developing, debugging, and testing applications. And it would be a good idea - to use virtual environments to limit cross-project dependencies and keep your OS package list under control.

JQ is a new GREP

JQ is a new GREP

If you are a cloud system administrator, security analyst, or data scientist, you already use jq (JSON Query), and if you don't, you should.

WSO2 API Manager

Install WSO2 API Manager 4.0.0 for Linux

This post describes how to install, configure, and start WSO2 API Manager 4.0.0 on Linux. Download WSO2 API Manager 1. Navigate to https://wso2.com/api-manager/ 2. Click on TRY IT NOW 3. Enter your email address 4. Click on the checkbox to accept the license 5. Download

WSO2 API Manager

Install WSO2 API Manager 4.0.0 for Windows

This post describes how to install, configure, and start WSO2 API Manager 4.0.0 on Microsoft Windows. Download WSO2 API Manager 1. Navigate to https://wso2.com/api-manager/ 2. Click on TRY IT NOW 3. Enter your email address 4. Click on the checkbox to accept the license 5.

Game of Words

I felt for Wordle [https://www.nytimes.com/games/wordle/index.html] the day I read about it, and now my morning starts with a fresh cup of coffee and a fresh puzzle. But sometimes, I struggle to see a word even if it is evident for a native speaker.

Quickest way to get PL/SQL source code from the Oracle Database

I run into network or security challenges where I can't use tools to connect to my Oracle Database, so I end up having to rely on SQL*Plus to get the source of my PL/SQL code, be it a PACKAGE, PROCEDURE, FUNCTION, or TYPE. Here you go.

Quickest way to set up the Oracle Instant Client for sqlplus access to the Oracle Database

Need quick and immediate access to SQL*Plus (i.e., sqlplus) from your Linux server? 1. Navigate to: https://www.oracle.com/database/technologies/instant-client/linux-x86-64-downloads.html 2. Download these files: * instantclient-basic-linux.x64-21.5.0.0.0dbru.zip * instantclient-sqlplus-linux.x64-21.5.0.0.0dbru.zip 3. Unzip the software: unzip

No Technology Today

No Technology Today

For the second day in a row, I can't get my thoughts together to write another technological post. The horror in Ukraine and the grim prospect of Russian citizens condemned by their insane rulers to poverty and humiliation is painful and furious. But worst of all, the increasingly

Pandoc: My Missing Tool

Pandoc: My Missing Tool

With the "everything as a code" approach, it's natural to treat documentation as a code and use the same source code management and delivery techniques. I know how to create and deliver documents. And now I found my missing link, static content generator - pandoc.

Whiteboard design discussion.

Oracle HTTP Server

Standalone Oracle HTTP Server: Deployment Options

In one of my previous posts, I mentioned multiple Oracle HTTP server deployment options. Let me do a small "show & tell" to explain how I pick the configuration.

Mysterious TLS in Oracle HTTP

Oracle HTTP Server

Mysterious TLS in Oracle HTTP

A little "forget-me-not" from a recent Oracle HTTP server troubleshooting, but it could happen to Apache HTTPD as well. To set up a stage: a work installation of the Oracle HTTP Server, stop presenting certificates on the secured port.

Flashback: The Lesson I Learned

Flashback: The Lesson I Learned

This piece is not about features or products. It's about lessons that we learn or not. The one I learned some twenty-three years ago was: "Don't ask for troubles and do one thing at a time."

Docker: Logn Errors

Docker: Logn Errors

Recently, I spent some time trying to find why I can not push my just-from-the-own image into the GitLab project registry. The message "illegal base64 data at input" is a bit confusing, but the solution is simple.

Bash scripts to diagnose network issues

These are 2 simple scripts I wrote that run various types of tests to help diagnose network issues between a source and target. They can be safely run as a non-root user as long as the commands exist. Script 1 - Various network tests This script runs 3 separate tests

Ansible: Dynamic Inventory

Ansible: Dynamic Inventory

I know that Ansible could use as inventory virtually anything, including scripts. However, all inventories on my day job are static, and we keep them in a source repository, and until now, I haven't had a chance to create or use one.

A Simple Token Generator

A Simple Token Generator

My friend's given me a perfect tip: "Whenever I need a random sequence of characters, I use OpenSSL rand functions." And to be a bit fancy, I pick the value that is easy to remember. So, when I need a token for QA tests, I generate

Bash script to test port availability

I created a quick script to test if a port is consistently available between a source server to a target server for the purpose of gathering statistics to see if there are any network hiccups not. This is a very simple and straightforward script. Simply copy the content below to

Sensitive data in Terraform

Sensitive data in Terraform

Terraform is probably the best choice to manage your infrastructure as a code. And if we are talking code, let's see how you can keep sensitive information away from your code repository.

Ansible: Markdown Reports

Ansible: Markdown Reports

The previous post [https://chronicler.tech/ansible-simple-reports] promised a simple reporting solution and two potential possibilities. Now it's time to go through the solution that would help you with report publications. The diagram from the previous post depicts information flow between components. Ansible Markdown Reports on Git/GitLab

Connecting with a private key using SSH and SFTP

SSH uses public/private key pairs. id_rsa is your RSA private key (do not share this!). id_rsa.pub is your RSA public key; this you give out to the administrator of the target system so that they can add it to verify that the signature came from your

Ansible: Format e-mail body.

Ansible: Format e-mail body.

The whole automation idea is to minimize or exclude humans from the process. However, you need to notify users and sometimes you should do it in style.

Getting "The payload data size exceeds the configured payload threshold size" in WebLogic

An Oracle SOA Suite 12c composite was consuming files via inbound polling on the FTP Adapter. The file size was larger than 10MB and we got a Payload Size Exceeds Threshold. The payload data size: "" exceeds the configured payload threshold size: "": Option #1: Update the binding

Ansible: Simple Reports

Ansible: Simple Reports

Any IT system, bigger than a chihuahua, ought to produce reports. It does not matter how they look, but it should generate and share information that humans can read.

Setting up single and multiple WebLogic NodeManagers in the same machine

If you have multiple Oracle WebLogic Server 12c domains on a single machine, can each domain have its dedicated Node Manager? Can a single Node Manager manage all the domains in this machine? Yes and yes. Multiple Node Managers on a Single Machine If you have multiple domains on your