Ramdisk

mkdir /mnt/temp/ramdisk/   # or   mkdir /tmp/ramdisk/    # doesn't really matter
chmod 777 /mnt/temp/ramdisk/
chmod 777 -R /mnt/temp/ramdisk/
sudo mount ramfs -t ramfs /mnt/temp/ramdisk/
mount ramfs -t ramfs /mountpoint
cd /mnt/temp/ramdisk/

alternative :
mount tmpfs -t tmpfs -o size=1G # not truly a ramdisk, tmpfs can swap.