When I invoke 'System Monitor' under the file systems tab it shows:
/dev/loop0 /KNOPPIX-DATA ext2 528.4 MB 125.8 MB 402.6 MB 76%
The used value of 402.6 MB (76%) has gradually gone up from minimal when Knoppix was first (Poor man) installed until now and I do not know why. I have not knowingly added anything apart from preferences I might make in various programs. My main usage is the Chrome browser. At the end of each session I clear browsing data and any downloads are moved to physical disk space and deleted from the downloads directory.
This figure is now too high and I want to reduce it by removing stuff that is not necessary. I thought I would use File manager for that so fired up PCManFM and looked at the /KNOPPIX-DATA directory and sub directories. There did not look much there at all. I looked at the properties of /KNOPPIX-DATA and the total size of files is 82.7 MB. I thought I would have a look inside the knoppix-data.img file by using another linux to extract the files from it. Again the files extracted came to a size of ~80+ MB.
So what is the other 319.9 MB used for and where is it so I can delete what is unnecessary!
Supermicro 4U 36 Bay Storage Server 2.2Ghz 16-C 128GB 1x1280W Rails TrueNAS ZFS
$725.06
CSE-118 Supermicro 1U GPU Server 2.6Ghz 28-C 128GB 2x Nvidia K40 GPU 2x1600W PSU
$580.03
Dell PowerEdge R630 8SFF 2.6Ghz 20-Core 128GB Mem 2x10G+2x1G NIC 2x750W PSU
$399.04
Dell PowerEdge R740XD Server | 2x Gold 6140 36 Cores | H730 | Choose RAM/ Drives
$2800.00
Intel Xeon E5-2680 v4 2.4GHz 35MB 14-Core 120W LGA2011-3 SR2N7
$17.99
Intel Xeon Gold 6140 SR3AX 2.3GHz 18-Core Processor CPU
$44.99
Intel Xeon E5-2697 v2 2.7GHz 30M 12-Core LGA2011 CPU Processor SR19H
$27.99
HP Z4G4 Intel Xeon W2133-3.6 GHz, 256 NVME, 6TB HDD, 32GB RAM P620 NO OS
$265.00
HP ProLiant DL380 Gen9 16SFF 2x E5-2680v4 2.4GHz =28 Cores 64GB P840 4xRJ45
$353.00
DELL PowerEdge R730 Server 2x E5-2690v3 2.6GHz =24 Cores 32GB H730 4xRJ45
$274.00