Hi All. I've been busy making some updates to the steem_price_feed.bash script originally written by 
I liked the idea of a script that didn't have a lot of external dependencies. I tried to improve on this by adding more error catching, logging, a README.md, a .config file, a run.sh script, and more.
I'm not saying this is a huge improvement on the original but ... so far I like it so maybe you will too. Hopefully it's easier to set up and run.
If you want to see what was changed and added, see the pull request at https://github.com/steempty/steem_price_feed.bash/pull/2/files
The current version is available at https://github.com/physicsdude/steem_price_feed.bash
I'll include the README.md below - you can also read it on github.
README.md
Summary
You can use this script to run an automated Steem price feed as a steem witness.
Start a command line wallet
You first need to be running a cli_wallet with a command like this (using a screen session or the like).
cli_wallet -s ws://localhost:8090 -H 127.0.0.1:8092 --rpc-http-allowip=127.0.0.1
There's a convenience script called start_cli_wallet_for_price_feed.sh which contains this command.
As described in the steem_price_feed.bash usage output
"for slightly better security you should keep the cli_wallet locked at all
times. In order to vote, this program needs to unlock the wallet. For this,
create a file named "lock" in the current directory with read permission only
for yourself, and paste the following JSON-RPC command into the "lock" file:
{"id":0,"method":"unlock","params":["<your_password>"]}
Obviously, you need to replace the placeholder with your actual password."
Set up the .config file
You should create a config file in the place shown below with PRICE_MAXTIME, PRICE_WITNESS, and PRICE_EMAIL
$ cd $HOME
$ mkdir .steem_price_feed.bash
$ vim $HOME/.steem_price_feed_bash/.config
Add the following lines
export PRICE_WITNESS='your-witness-name'
export PRICE_MAXTIME=60
export PRICE_EMAIL='email-you-want-to-get-alerts-at@example.com'
Exit, and save.
Run the price feed
The main price feed script has error reporting mechanisms and will exit if anything seems to go wrong.
For this reason, there is a wrapper script called ./run.sh.
You can run it like this, e.g. from a screen session
$ ./run.sh
This is the main script you should run because it'll re-start the main script and (if you supplied an email) email you info about the error.
Credits
steem_price_feed.bash is based on steem_price_feed.bash by https://steemit.com/@steempty. Thank you steempty.
https://steemit.com/witness-category/@steempty/bash-script-for-price-feed-task-of-witnesses
According to steempty's post, improvements were made by https://steemit.com/@cyrano.witness. Thank you cyrano.witness.
Also referenced here https://steemit.com/witness-category/@bitcalm/how-to-become-a-witness
Commits made by nobody@example.com in late 2016 are courtesy of https://steemit.com/@nonlinearone
This includes the new files run.sh, test_price_feed.sh, start_cli_wallet_for_price_feed.sh, and this README.md.