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.
Cisco ASA5525-X 8-Port Firewall Adaptive Security Appliance *USED*
$55.00
Fortinet FortiGate 60F | 10 Gbps Firewall Network Security EXPIRED (FG-60F)- New
$226.79
Cisco ASA5506-K9 ASA 5506-X Network Security Firewall
$40.00
Cisco ASA 5506-X Network Security Firewall w/ AC Adapter
$39.99
Fortinet FortiGate FG-100E security Appliance 100E Firewall USED Initialized
$182.99
pfSense Firewall VPN AES-NI Celeron N3350 1.10GHz 6GB RAM 80GB SSD 5x Intel NIC
$81.00
pfSense Firewall VPN AES-NI Celeron N3350 1.10GHz 10GB RAM 80GB SSD 5x Intel NIC
$91.00
$120.00
Fortinet Fortigate FG-61E Firewall Network Security Appliance ATP Bundle 1 years
$263.99
Fortinet Fortigate FG201E Security Firewall w/ Power Cable
$249.00