While snooping around the stock init script, I spotted a variable, home, in the mountdata function standing out from the crowd. After doing some quick tests, the preliminary results are summarised as follows,
Prerequisite: The persistent overlay (.img, .aes or .inf) being on the same partition as the KNOPPIX file.
Functionality: Loading a specific persistent overlay at the boot time.
Usage: knoppix home=/mnt-system/foobar/dummy
*The dirname and basename cannot contain any whitespace characters.
*The basename needs to be unique if there are more than one overlay files in the same folder because the suffix cannot be part of the argument.
Crucial 8GB 1x8GB PC RAM PC3L 12800U DDR3 1600MHz Desktop Memory DIMM
$8.36
Micron 8GB DDR4 1Rx16 PC4-3200AA Laptop RAM Memory MTA4ATF1G64HZ-3G2E2
$10.00
A-Tech 8GB DDR3 1600 PC3-12800 Laptop SODIMM 204-Pin Memory RAM PC3L DDR3L 1x 8G
$13.99
Samsung 8GB PC4-2666V DDR4 RAM Memory Module M378A1K43DB2-CTD
$9.75
1 x 16GB SK Hynix PC4-2666V DDR4 ECC REG Server Memory HMA82GR7CJR8N-VK (SK4
$15.80
Crucial 8GB SO-DIMM PC3-12800 (DDR3-1600) Memory
$9.49
Crucial DDR3L 16GB 1600 2x 8GB PC3-12800 Laptop SODIMM Memory RAM PC3 16G DDR3
$22.45
Team T-FORCE VULCAN Z 32GB (2 x 16GB) PC RAM DDR4 3200 (PC4 25600) Memory
$54.99
A-Tech 128GB 4x 32GB 2Rx4 PC4-19200R DDR4 2400 ECC REG RDIMM Server Memory RAM
$191.96
USB Flash Drive Memory Stick Pendrive Thumb Drive 4GB, 8GB, 32GB, 64GB 128GB LOT
$223.42