Shell scripts and one liners: 2020

#!/bin/bash 
  ######################################################################
 ######################################################################
## Author: A.M. Danischewski, Created Date: 20200322, Version: v1.01
## File ID: b7c4a0cb19767d4d88f1cbd49474dad4
## Last Modified: 2020-03-22
## Issues: If you find any issues emai1 me at my <first name> dot 
##         <my last name> at gmail dot com.  
##
## This script fetches from arcgis.com COVID-19 data by default every 10 
## minutes.  
## 
## This program is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program. If not, see <http://www.gnu.org/licenses/>.
 ######################################################################
  ######################################################################


declare URL='https://services1.arcgis.com/0MSEUqKaxRlEPj5g/arcgis/rest/services/ncov_cases/FeatureServer/1/query?f=json&where=(Confirmed%20%3E%200)%20AND%20(Deaths%3E0)&returnGeometry=false&spatialRel=esriSpatialRelIntersects&outFields=*&orderByFields=Deaths%20desc%2CCountry_Region%20asc%2CProvince_State%20asc&outSR=102100&resultOffset=0&resultRecordCount=250&cacheHint=true' 
 ## Fetch Interval (600 = 10 minutes) 
declare SLEEP=600 
 ## Change DATA_DIR to a writable location where you want keep your data 
 ## eg. /mnt/hyper1/covid19
declare DATA_DIR="/home/${USER}/covid19" 
declare FILE_PFX="covid_data_" 
declare DATE_SFX="" 
declare FILE_EXT="txt" 
declare FILE_NAME="" 

mkdir -p "${DATA_DIR}" 

while :; do 
 DATE_SFX=$(date +"%m%d%Y%H%M")
 FILE_NAME="${FILE_PFX}${DATE_SFX}.${FILE_EXT}"
 curl -S "$URL" > "${DATA_DIR%%/}/${FILE_NAME}"
 sleep ${SLEEP}
done 

exit 0
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