Check if PC/SC and attached USB reader works:
java -Dsun.security.smartcardio.library=/usr/lib/x86_64-linux-gnu/libpcsclite.so -jar gp.jar --list
Launch base interactive shell:
./jcshell.sh
Launch interactive shell with custom functions folder:
./jcshell.sh scripts/card-applets/
The presence of jcshell.rc in the custom functions folder allows for
further customizations.
./jcshell.sh scripts/desfire/ /atr GetApplicationIDs CreateApplication 0102030F0E GetApplicationIDs SelectApplication 010203