How to mount a NTFS partition at startup

Find out the device ID
sudo blkid
the device ID is the code identified as UUID.

Add the device to the fstab file (as we are going to modify system files, better to make a backup)
sudo cp /etc/fstab /etc/fstab.back
sudo gedit /etc/fstab
the line to be added should look like
UUID=[uuid] [mount-dir] ntfs users,exec,defaults 0 0
where [uuid] is the code you found in the previous step, and [mount-dir] is the directory where you want to mount the partition, you should create this directory
mkdir [mound-dir]

Mount the partition
sudo mount -a
that is it. If no errors are thrown, the partition should be mounted at [mount_dir].