Copy 2 partitions to .img file

[Hélder Pinheiro <pinheiro.helder13@gmail.com>]

Hello all,

I have a memory card with 16GB of size, but only 4GB are partitioned through 2 partitions (sdb1 and 2).

I want to copy the content of both partitions into a .img file, in order to be able to flash it on another 4GB memory card..

I tried with dd command, but I am only able to copy one partition each time or the entire 16 GB.

Could you help me copying only the two partitions?

Cumprimentos,
Hélder Pinheiro