Rock/resize linux rootfs

The default size of lubuntu firmware's roofts is about 2.0G, it's too small, you can do as follows to expends it

1: For Nand image If you flash the image on nand flash, you can execute the below command on the terminal in the board's lubuntu system

 "resize2fs /dev/block/mtd/by-name/linux-root " 

to expand the rootfs

2: For sdcard image

If you use the sdcard's image, you should put the sdcard into a card reader ,and put the card reader into PC and resize the partations

1: For PC with Linux

Use gparted

1. sudo gparted /dev/sdb

2: For PC with windows