• What are File Systems?
• Why different types with different features?
• How do I choose?
• Do I WANT different types?

The Wonderful World of Linux FileSystems! by Lee_Lammert.

Lee's BTRfs level 100 intro, part 1 of BTRfs 100/200/500 series, "Troubleshooting Grub Boot Failure", that was given last Wednesday at the monthly SLUUG general meeting, demonstrated recovering a BTRfs file system. Utilizing the features of the BTRfs file system allowed for the recovery of files that COULD have otherwise been lost!

So tonite... we back off a bit to look at "the big picture". This will give you that understanding that will prepare you. In a future meeting (or 2) we will get into the details, then into the intermediate level, as in Practical Ops (for sysadmins using Snapper, subvolumes, RAID, ...).

That will lead to Deep Internals, as in Engineering Analysis for kernel-savvy, file system experts.

Recordings and materials of last week's talk can be found in BRTfs File System Level 100 Introduction

# =============================

# THE talk starts at 6:30pm CDT Thurs 18 Dec 2025.

[www.stllinux.org/next](https://www.google.com/url?q=http://www.stllinux.org/next&sa=D&source=calendar&usd=2&usg=AOvVaw3Fr4kxOuJK-EE79BztiZnJ)
The url link to this ZOOM meeting is posted earlier on the day of the meeting at the [www.stllinux.org](https://www.google.com/url?q=http://www.stllinux.org&sa=D&source=calendar&usd=2&usg=AOvVaw2IJ_xDAVx-5P0Fpyff4XyU) home page. It is the "next" link 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.
HOW TO CONNECT instructions on [https://stllinux.org/](https://www.google.com/url?q=https://stllinux.org/&sa=D&source=calendar&usd=2&usg=AOvVaw2uM7FapJDOGtNsHLFt_7Rb) 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 Central Standard Time ( CST ), so that you can join early to test your microphone, screen and video sharing.
You can also just informally chat & meet people.

The Saint Louis MO, STL Linux Users Group (STLLUG) meets monthly to talk about Linux. This GNU/Linux Users Group usually holds its meetings on the third or fourth Thursday of every month. Meetings are free and open to everyone.

At 6:30 PM CST we start with introductions, announcements, current events of interest, and a general CALL FOR HELP segment. Then we will go into the presentation of our main topic, sometime around or after ~6:45 PM CST.