cd ~
pip3 install bitshares-pricefeed --user

bitshares-pricefeed create

vim config.yml
# The producer name(s)
producer: your_witness_name

bitshares-pricefeed addkey

Wallet Encryption Passphrase:
Repeat for confirmation:

Private Key (wif) [Enter to quit]:

bitshares-pricefeed update

sudo touch /var/log/bitshare-pricefeed.log
sudo chown ubuntu /var/log/bitshare-pricefeed.log

$ crontab -e

SHELL=/bin/bash
PATH=/home/ubuntu/bin:/home/ubuntu/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
UNLOCK="PASSWD"

0,15,30,45 * * * * bitshares-pricefeed --configfile /home/ubuntu/config.yml --skip-critical --no-confirm-warning update >> /var/log/bitshares-pricefeed.log 2>&1

# bitshares-pricefeed --help
Usage: bitshares-pricefeed [OPTIONS] COMMAND [ARGS]...

Options:
  --configfile TEXT
  --confirm-warning / --no-confirm-warning
                                  Need for manual confirmation of warnings
  --skip-critical / --no-skip-critical
                                  Skip critical feeds
  --help                          Show this message and exit.

Commands:
  addkey  Add a private key to the wallet
  create  Create config file
  update  Update price feed for assets

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.