Reading time: 9 – 15 minutes
Quick cookbook for just doing what the subject of the post says:
opkg update opkg install cfdisk cfdisk # change partition size using the UI opkg install losetup resize2fs BOOT="$(sed -n -e "/\s\/boot\s.*$/{s///p;q}" /etc/mtab)" DISK="${BOOT%%[0-9]*}" PART="$((${BOOT##*[^0-9]}+1))" ROOT="${DISK}0p${PART}" LOOP="$(losetup -f)" losetup ${LOOP} ${ROOT} fsck.ext4 -y ${LOOP} resize2fs ${LOOP} reboot