I have tried to mount a SD card on Linux Mint, I have found the right device file and tried: mount -t vfat /dev/sdb /mnt/zauberportal ,but it failed and I tried some variations like different types of file systems after the -t option. Now, I read, that it is quiet possible that it is because of a badly written partition table, the suggestion was to erase the whole partition table by filling the first 512 bytes of the SD card with zeros: dd if=/dev/zero of=/dev/sdb bs=512 count=1, than I should create a partitioning table using a program called gparted, but it did not work.Is it possible to create a new partitioning table from the command line ? 
How to create a new partitioning table on SD card from the command line ?
command line;partition;dd;sd card