Sacramento Linux Users’ Group - news

August General Meeting

2026-08-16T00:00:00-07:00

General discussion and I will bring notes on updating Debian Exim mail server to use TLS certificates from Lets Encrypt. We generally meet on the second floor. Look for open laptops and the possible printout of a penguin on the table.

See you there.

Brian

July General Meeting

2026-07-19T00:00:00-07:00

Meet at Kupros for social. See you there.

June General Meeting

2026-06-14T00:00:00-07:00

We will meet at Kupros for this meeting!

Bring your gadgets, laptop, etc., and we will discuss, evangelize and strategize the upcoming meetings. We usually congregate on the second floor. Look for a penguin printout or hackers with their laptops open.

Brian

May General Meeting

2026-05-17T00:00:00-07:00

We will meet back at Kupros for this meeting!

Brian

April General Meeting

2026-04-12T00:00:00-07:00

This will be a social meetup at the Raley’s on Freeport. See the locations page for more details. Bring your laptop, gadgets, questions, curiosity, etc. There are a series of big tables.

Raley's Store 415

4690 Freeport Blvd.
Sacramento CA,
95822

March General Meeting

2026-03-09T00:00:00-07:00

This will be a social meetup at the Raley’s on Freeport. See the locations page for more details. Bring your laptop, gadgets, questions, curiosity, etc.

Raley's Store 415

4690 Freeport Blvd.
Sacramento CA,
95822

February General Meeting

2026-02-15T00:00:00-08:00

This will be a social meetup at the Raley’s on Freeport. See the locations page for more details. Bring your laptop, gadgets, questions, curiosity, etc.

Raley's Store 415

4690 Freeport Blvd.
Sacramento CA,
95822

January General Meeting

2026-01-11T00:00:00-08:00

We will meet back at Kupros for this meeting! The last meeting we had, some noted that it was too loud. I had been thinking about a different location, but I didn’t investigate, so we will continue at Kupros for now.

Brian

December General Meeting

2025-11-23T00:00:00-08:00

We will meet back at Kupros for this meeting!

Brian

Kevin demonstrates AI document repository

2025-10-22T00:00:00-07:00

Kevin will present his Byte Vision local document analysis tool.

This talk will be at the Bel Aire Arden. Note that the meeting will be on Monday, rather than the usual Tuesday.

4320 Arden Way
Sacramento, CA 95864

Formal Methods and Program Correctness

2025-10-14T00:00:00-07:00

We will talk about the use of SPARK/Ada to verify program correctness using automated tools.

Tools / notes from meeting

Ada compiler in Fedora is GNAT
JGrasp visualization tool . We used this tool to view the Ada 95 tutorial programs. JGrasp will not parse SPARK directives.
Ada 95 tutorial.
Alire is the virtual evironment development tool.
Presentation resources: slides, examples, references, addtional notes.

September General Meeting

2025-08-18T00:00:00-07:00

We have a change of topic for the September meeting.

Have you ever used the Liferay Digital Experience Platform? The next meeting, we will do a little exploring in Liferay.

We will investigate Liferay form creation and special field types.

After meeting note

We attempted to create a simple form field file upload, yet we couldn’t seem to access the documents and media repository through the API. You can check the source on Github.

August General Meeting

2025-07-25T00:00:00-07:00

We will return to Kupros for this meeting. It will be open discussion. Bring your gadgets, questions, and projects that you may be working on.

Kevin provide a preview for his Byte Vision local document analysis tool.

Brian

July General Meeting

2025-06-27T00:00:00-07:00

We will discuss C# on GNU/Linux.

Many thanks to James at Strad Meadery for hosting SacLUG for the July meeting

Strad Meadery graciously provided their facility to us for hosting the meeting. James (from Strad Meadery) says that if we plan to eat during the meeting that we should bring our own food or order food for delivery.

C# discussion agenda

Some stuff in the meeting.

This is a loose collection of notes and links for our dicsussion during the meeting.

Microsoft only allows the use of vsdbg from within VSCode. Samsung has a Command line debugger.

Command line project creation

dotnet new console -o ./CsharpProjects/TestProject

The namespace declaration provides a way to logically organize your code.

Add dependency to CSharp project such as IText

dotnet add package itext --version 9.2.0

June General Meeting

2025-05-26T00:00:00-07:00

SacLUg at Kupros again!. This will be a social hangout. Bring whatever gadget or your favorite project or questions (maybe we can answer), and socialize.

May General Meeting

2025-05-07T00:00:00-07:00

We will return to Kupros for this meeting. This will be a social hangout. Bring whatever gadget or your favorite project or questions (maybe we can answer), and socialize.

Third installment of Clojure

2025-03-19T00:00:00-07:00

This is our third installment of Clojure. Once again, it is at the Raley’s 447 in Natomas.

4650 Natomas Blvd
Sacramento, CA 95835

More Clojure

2025-02-19T00:00:00-08:00

More talk on Clojure! Diego will give us more details to using Clojure. It should prove interesting!

This time we will learn how to create a new endpoint, read query parameters, and learn how to use cookies in Clojure.

Note that this meeting is at the Raley’s in Natomas at 6pm.

Brian

January General Meeting

2025-01-19T00:00:00-08:00

Social Meetup at Kupros. See you there. It appears that many of us have been using Thinkpads running GNU/Linux. Bring which gadget you have and hang out and socialize.

Brian

February General Meeting

2024-12-26T00:00:00-08:00

We will be at Bel Air Market at Arden. Please see the locations link to see the location.

Have you ever wanted to learn Lisp?

Clojure is a modern Lisp running on the Java Virtual Machine to build Web servers.

In this talk, we’ll learn a little bit about Lisp and its history and variants, understand how to operate Lisp systems, install Clojure, start a Compojure project, and build a simple Lisp-based web server in Compojure that will output a factorial function.

December General Meeting

2024-11-19T00:00:00-08:00

We will be at Kupros for this meeting. This will be a social hangout. Bring whatever gadget or your favorite project or questions (maybe we can answer), and socialize.

November General Meeting

2024-10-20T00:00:00-07:00

We will be at Kupros for this meeting. This will be a social hangout. Bring whatever gadget or your favorite project or questions (maybe we can answer), and socialize.

Thank you to everyone who came to this meeting!

October General Meeting

2024-09-19T00:00:00-07:00

We will return to Kupros for this meeting. This will be a social hangout. Bring whatever gadget or your favorite project or questions (maybe we can answer), and socialize.

September General Meeting

2024-08-22T00:00:00-07:00

We will explore integrating a React application into Liferay per David Nebingers blog post, From React App to React Client Extension in 5 Easy Steps.

August General Meeting

2024-07-29T00:00:00-07:00

We will be at the Bel Aire Something Extra Gather Room again on Arden.

More hands on demo with Spring Boot and React.

Full Stack Development with React

We will continue to walk through various aspects of the Full Stack Development with Spring Boot 3 and React: Build modern web applications using the power of Java, React, and TypeScript, Fourth Edition using Fedora 40.

Last session, we implemented various CRUD operations. We will continue the process. We will continue with CRUD (Create, Read, Update, Delete) operations, yet perhaps add the security components to the REST layer and other aspects!

Examples

The 4th editon uses Gradle, React/Vue, and Typescript!

July General Meeting

2024-06-18T00:00:00-07:00

We will be at the Bel Aire Something Extra Gather Room again on Arden.

The room has a large screen TV with HDMI in, so we will have some sort of hands on demo.

Full Stack Development with React

Just when you thought you had everything going with the older way of doing things, there is the 4th Edition!

We will walk through various aspects of the Full Stack Development with Spring Boot 3 and React: Build modern web applications using the power of Java, React, and TypeScript, Fourth Edition using Fedora 40.

Examples

The 4th editon uses Gradle, React/Vue, and Typescript!

Brian

June General Meeting

2024-04-18T00:00:00-07:00

We will be back at Bel Aire in their meeting room.

Full Stack Development with React

We will walk through various aspects of the Full Stack Development with Spring Boot and React using Fedora 40.

Examples

Tools in use

Fedora 40
Eclipse
VS Code
MariaDB sudo dnf install mariadb-server
Postman
nvm
Mysql JDBC driver
Fedora Java Alternatives

Create the database and the user

create database cardb character set utf8;

GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER,
CREATE TEMPORARY TABLES ON cardb.*
TO 'brian'@'localhost' IDENTIFIED BY 'Rockit2';

Spring resource to connect to mysql

spring.datasource.url=jdbc:mariadb://localhost:3306/cardb 
spring.datasource.username=brian
spring.datasource.password=Rockit2
spring.datasource.driver-class-name=org.mariadb.jdbc.Driver
spring.jpa.generate-ddl=true 
spring.jpa.hibernate.ddl-auto=create-drop

spring.jpa.show-sql=true
spring.jackson.serialization.FAIL_ON_EMPTY_BEANS=false
spring.data.rest.basePath=/api

Fix eclipse crashing. Add this to .bashrc

export WEBKIT_DISABLE_COMPOSITING_MODE=1

Verify nvm configuration for the shell.

export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion

Start database

sudo service mariadb start

Check that user can connect to MariaDB

mysql -u brian -p cardb

Import Chapter 5 example code and modify SecurityConfig.java per book [Hinkula,238]. We will not have security settings for this demonstration.

http.csrf().disable().cors().and()
    .authorizeRequests().anyRequest().permitAll();

Update application.properties

Start CarDatabaseApplication.java.

Verify REST interface for cars with PostMan

Check npm conifuguration. Create carfront skeleton and install library dependencies [Hinkula,239].

npx create-react-app carfront
cd carfront
npm install @mui/material @emotion/react @emotion/styled

Add the components folder to carfront project [Hinkula,245]. Create Carlist.js and add content.

Verify that the Spring Boot backend is running CardatabaseApplication. Start the React application from the terminal npm start.

Brian

April General Meeting

2024-03-25T00:00:00-07:00

Social meetup at Kupros. Bring your gadget or just hang out talk GNU/Linux or whichever project you find interest in and/or working on.

Brian

May General Meeting

2024-03-25T00:00:00-07:00

Social meetup at Kupros. Bring your gadget or just hang out talk GNU/Linux or whichever project you find interest in and/or working on.

Brian

March General Meeting

2024-02-19T00:00:00-08:00

Sen will talk about his embedded video player project! He gave a talk at a conference. You will definitely want to check out this talk!

Notes:

Sen gave a great presentation on his video player and provided an in depth discussion on the usage of different codecs and their availability.

Video player project by Sen

We had a couple of other old timers show up at the meeting as well!

Brian

February General Meeting

2024-01-18T00:00:00-08:00

We will be doing a social at Kupro’s. I didn’t book the room at Raley’s.

Brian

January General Meeting

2023-12-27T00:00:00-08:00

Social. Hang out and drink beer and talk GNU/Linux. If you have a gadget you have or some code, please bring it and show and tell.

Meeting notes

provided by Gary!

I’d like to thank Brian for hosting the group meeting at Kupros last night.

It was supposed to be mostly social, but we ended up talking a lot of Linux. He mentioned that his new laptop seemed to have many options for the core configuration and we started to discuss how this was possible and might have gone off the deep end :)

We looked at some of the details of the C code for the navigation app and it was interesting to see the API’s for accessing the sensor data. I hadn’t played with that stuff for quite a while. We discussed the ease of accessing sensor data provided by a phone vs usb add on.

And the happy hour snack and beer weren’t bad either.

December General Meeting

2023-12-03T00:00:00-08:00

note: we will be meeting at a brand new location for the December meetup, pls check out our locations page for info.

Our Fearless leader™ Brian will demo/talk about his raspi hat with a 3 axis acclerometer , gyro, and magnetometer.

Meet our new guy Sen

2023-11-21T00:00:00-08:00

We will hang out and drink some beer and eat!

September General Meeting

2023-09-18T00:00:00-07:00

Meet to hang out and see if we can make some progress on the saclug site.

Dude, where is my car?

2023-08-18T00:00:00-07:00

August General Meeting

2023-08-15T00:00:00-07:00

Mark and Brian met at Kupros and decided to adopt the nblug Pelican website. This is Pelican.