I have a Knoppix 4.0 DVD that came bundled with a computer magazine. The DVD seems to run fine. Nevertheless I wanted to check data integrity by entering "testcd" at boot. The computer began checking files, but after a while the DVD drive was spinning down and the screen turned dark. When I pressed a key, the screen came back, and I could see that the computer was testing the KNOPPIX2 file when it got stuck. I tried testcd with two different computers and never got beyond the KNOPPIX2 file.
Can anybody confirm this issue? Is "testcd" supported by the DVD versions of Knoppix?
Cisco GLC-SX-MM 1000Base SX SFP Transceiver Module 30-1301-02
$5.99
Cisco 10-2456-03 Genuine Cisco SFP-10G-LRM V03 10GBASE-LRM SFP+Transceiver
$24.99
Dell EMC FTLF8532P4BNV-E5 019-078-057 32G SFP28 Fiber Channel 850nm Transceiver
$57.00
Cisco Nexus 48-Port 10G SFP+ Switch N9K-9396PX w/ 9K-M12PQ 12-Port 40G QSFP
$249.99
NEW Sealed Cisco SFP-10G-LR 10GBASE-LR SFP+ 1310nm 10km *US Shipping*
$18.00
Genuine Cisco SFP-10G-SR V03 10GBASE-SR SFP+ Transceiver Module 10-2415-03
$8.00
F5 Networks 10GB OPT-0016-00 F5-UPG-SFP+-R 10GBASE/SR SFP Transceiver
$4.00
Mellanox Original MFM1T02A-SR 10GbE 10GBASE-SR SFP+ Transceiver
$9.00
LOT OF 20 Genuine Cisco SFP-10G-SR V03 10GBASE-SR SFP+ Transceiver Module
$89.00
10 PCS Cisco GLC-LH-SMD 10-2625-01 1310nm SFP Transceiver Module
$85.00