Pasted

# expand partition 1 of sd card to max size:
echo ,+ | sudo sfdisk --no-reread --no-tell-kernel /dev/mmcblk0 -N 1
 
# tell kernel to recheck partitions
sudo partprobe /dev/mmcblk0
 
# expand filesystem to fit partition:
sudo resize2fs /dev/mmcblk0p1