Re: how to check for disk fragmentation? [SOLVED]

[home user]

(Joe wrote)
>  You don't. The ext2/3/4 file systems are designed to minimize
>  fragmentation, ... 
Not what I expected.  But I like it!

Recently, I've been moving a lot of files and sub-directories around. 
And I'm preparing for a semi-annual big back-up and system upgrade (to 
F-29).  Because it has been a few years since I last checked for 
fragmentation, I thought it would be good to at least check.

A few minutes ago, based on Ed's reply, I tried "e4defrag -c" on
"/home":
-----
e4defrag 1.44.2 (14-May-2018)
<Fragmented files>                             now/best       size/ext
1. [user1's home]/.ICEauthority              30/1              4 KB
2. [user1's home]/.local/share/tracker/tracker-miner-fs.log
                                                 12/1              4 KB
3. [user2's 
home]/.nv/GLCache/e0ac323390458da3db161114e73bf39c/89ca161336d63803/c6eb5423ccd49d57.toc
                                                 11/1              4 KB
4. [user2's home]/.local/share/tracker/tracker-miner-fs.log
                                                 29/1              4 KB
5. [user2's 
home]/.nv/GLCache/1518083e014283666145392811bca1e8/4c4d90067ea0e5dc/c6eb5423ccd49d57.toc
                                                  9/1              4 KB

  Total/best extents				55461/52910
  Average size per extent			131 KB
  Fragmentation score				1
  [0-30 no problem: 31-55 a little bit fragmented: 56- needs defrag]
  This directory (/home) does not need defragmentation.
  Done.
-bash.2[~]:
-----
So it looks great.

The results above do raise a question in my mind:  What are those 
"[user's home]/.local/share/tracker/tracker-miner-fs.log"
files?  Anything to do with coin or data mining, or something else 
malicious?

Thank-you, Joe and Ed.
Bill.