tutorial: modfiying one file out of a giant set without pulling the whole set

[flyingzumwalt]

modfiying one file out of a giant set without pulling the whole set
steps:

1. get the hash
2. grab the file you're going ot change withfiles api
3. modify the file
4. add the modified file to ipfs
5. get the new root hash of the modified dataset

[Kubuxu]

1. get the hash
   DATASET_HASH=Qm...AAA
2. grab the file you're going to change
   ipfs cat $DATASET_HASH/dir/change > change
3. modify the file
   sed -e '...' change > new_change
4. add the modified file to ipfs
   NEW_CHANGE=$(ipfs add -Q new_change)
5. add link to the dataset to the Files API (Files API is virtual)
   ipfs files cp /ipfs/$DATASET_HASH /location the /ipfs/ prefix for the hash is required
6. remove old file from the dataset
   ipfs files rm /location/dir/change
7. put changed file to the dataset
   ipfs files cp /ipfs/$NEW_CHANGE /location/dir/change
8. get the new root hash of the modified datase
   ipfs files stat --hash /location