Btrfs (B-TRee FileSystem). Lee_Lammert hopes to cover 2 parts, both "100 & 200" which will lead to his future presentation of btrfs 500 at a future date,
btrfs 100 → Intro / Fundamentals (for general Linux admins)
btrfs 200 → Intermediate / Practical Ops (for sysadmins using Snapper, subvolumes, RAID)
These will prepare you for the "btrfs 500" that will be upcoming at a future mtng in a week or a month.
btrfs 500 → Deep Internals / Engineering Analysis (for kernel-savvy, filesystem experts)

Btrfs (B-TRee FileSystem) is a modern, copy-on-write (COW) file system for Linux that focuses on fault tolerance, easy administration, and advanced features like snapshots, built-in volume management, data checksums for self-healing, and transparent data compression.

It supports multiple disks and RAID 0, 1, 10 configurations, and includes features like online resizing and defragmentation.

Key features:

*

Copy-on-Write (COW):
*
Snapshots:
*
Self-healing:
*
Volume management:
*
Data compression:

=≠=≠=≠=≠≠≠====≠=========================
THE ABOVE MAIN talk starts at ~7:15pm CDT Wed 10 Dec 2025. Thats
MAIN Topic: "btrfs" File System by Lee_Lammert.

It is immediately preceded by
~7:00pm cdt Announcements

All is preceded by the below tutorial starting at
6:30pm cdt.
BASIC Tutorial: What is a Router / Firewall? by Grant Taylor
What are they? Why do you need/want them? Can I just take a Linux box and turn it into a router/firewall? Or should I buy one new off the shelf? Where does it go in your network?

For Zoom Link info, go to:

# www.sluug.org/next

Our usual format is"
6:30pm
BASE turorial

~7:00pm Announcements & general Q&A

~7:15pm
MAIN:

The URL link to instructions at the www.sluug.org home page, are posted the day prior to this remote ZOOM meeting. The "next" link is called "linked here". You may have to refresh your browser after each time you check.

ONLINE MEETINGS ONLY until further notice.
ONLINE session will use remote video software.
CONNECTION instructions will be on the www.sluug.org web page and our mailing lists. Note that your browser cache may need to be refreshed each time you check the above web page for the instructions. We will open the remote session at about 6:00 PM, so that you can join early to test your microphone, screen and video sharing.

Details will be published on https://www.sluug.org/ when available.

www.stllinux.org/next

https://newlug.sluug.org/next.txt
The URL link instructions to this Jitsi meeting are posted at the above home page on the day prior. It is the link called "linked here" on the home page above. You may have to refresh you browser each time you check.

ONLINE MEETINGS ONLY until further notice.
ONLINE session testing will use JITSI remote video meeting software.
CONNECT INSTRUCTIONS to be posted on the above web page and our mailing lists. Note that your browser cache may need to be refreshed each time you check the above web page for the instructions.

A Linux Users Group for the newcomers to Linux.

Topics begin with whatever the newest user needs to know.

Meetings are free and open to the public. You are invited to attend our meetings. They are usually held on the fourth Tuesday of every month from 6:30 PM until 9:00 PM. The December meetings might be on the third Tuesday.

We will open the remote session at about 6:00 PM, so that you can join early to test your microphone, screen and video sharing.

We have no membership dues or other charges for the meetings. Any room or service fee is paid for by SLUUG. Please join us at our next meeting or event for answers, fun, knowledge and networking.

slacc.org/next
The URL link to this meeting is posted earlier on the day of the meeting at the slacc.org home page. It is the "next" link called "linked here" on the home page above. You may have to refresh your browser after each time you check.

ONLINE MEETINGS ONLY until further notice.
ONLINE session will use JITSI remote video software.
CONNECT instructions will be linked on the slacc.org web page and our mailing lists. We will open the remote session at about 6:00 PM, so that you can join early to test your microphone, screen and video sharing.

This meeting is usually held the first Thursday of every month.

We hold an Online Linux Configuration Workshop when nothing else more interesting comes up, or when there is no other event or activity scheduled. Problems with other operating systems and hardware are also frequently fixed. New software tools are often demonstrated.

Linux is an Internet capable Networking Operating System that provides many fully functional applications that perform well on both older and new computers. Most Linux distributions are free or low cost and provides an extremely reliable and cost effective alternative to high priced proprietary software.

The online workshop is where we usually examine, troubleshoot, fix and repair difficult hardware and software configuration problems for Linux newcomers. We have have had considerable success solving problems remotely.

If we ever get back to face-to-face meetings*,* you would bring your laptop or PC to our hands on workshop to troubleshoot your Linux installation, network connection or X Window GUI configuration problem. We have full connectivity to the Internet on site and know how to use it. Just remember to bring your laptop or your PC with monitor, keyboard, mouse, cables, cords, power strips and two blank discs or a USB thumb drive.