sudo mkdir -p /mnt/sdcard
sudo mount /dev/mmcblk1p1 /mnt/sdcard
This will only allow root user to write. To allow sudoers to write, edit /etc/fstab:
/dev/mmcblk1p1 /mnt/sdcard vfat umask=000,uid=1000,gid=27 0 0
sudo mkdir -p /mnt/sdcard
sudo mount /dev/mmcblk1p1 /mnt/sdcard
This will only allow root user to write. To allow sudoers to write, edit /etc/fstab:
/dev/mmcblk1p1 /mnt/sdcard vfat umask=000,uid=1000,gid=27 0 0