cardos-tool - displays information about Card OS-based security tokens or format them

cardos-tool [OPTIONS]

The cardos-tool utility is used to display information about smart cards and similar security tokens based on Siemens Card/OS M4.

--format, -f

Format the card or token.

--help, -h

Print help message on screen.

--info, -i

Display information about the card or token.

--reader arg, -r arg

Number of the reader to use. By default, the first reader with a present card is used. If arg is an ATR, the reader with a matching card will be chosen.

--startkey arg, -s arg

Specify startkey for format.

--change-startkey arg, -S arg

Change Startkey with given APDU command.

--verbose, -v

Causes cardos-tool to be more verbose. Specify this flag several times to enable debug output in the opensc library.

--wait, -w

Causes cardos-tool to wait for the token to be inserted into reader.

cardos-tool was written by Andreas Jellinghaus <>.

04/05/2024 opensc