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.
Vintage DEC Digital Equipment PDP-11 Half Blank Front Panel 19''
$69.99
Vintage Apple Macintosh II M5000 Computer AS-IS - PLEASE READ
$250.00
Chrislin Industries CI-1123 PDP-11 Q-Bus DRAM Card, Untested
$100.00
IBM mainframe server cpu IBM93 vintage cpu collector's item
$125.99
*PAIR* 1960's Vintage GE-600 Series Mainframe Computer PCBs Bitslice Accumulator
$14.95
Digital DEC LK201 Terminal Keyboard RJ11 Connection Mainframe
$49.00
Vintage Computer Punch Plug Board Mainframe Panels & Wiring Harness
$50.00
Vintage Hewlett Packard HP 2100A Microprogrammable Computer System Mainframe
$999.99
Vintage Computer, Memorex Storage Unit For Main Frame Computer 1986, Movie Prop
$995.00
Lotus Approach Database for Windows Release 2.1 Mainframe Collection Rare Sealed
$456.74