Notify a slack channel/user if a process is no longer running -- start with: ./slack_notify.sh <something you are watching for in the process list>

slack_notify.sh

#!/bin/sh

SLACK_HOSTNAME="XXX.slack.com"
SLACK_URL="https://hooks.slack.com/services/XXXXXXXXXX"
SLACK_CHANNEL="@....."
SLACK_BOTNAME="XXXXXX"

OUTPUT=$(ps ax|grep "$1"|grep -v grep|grep -v $0)           
if echo "$OUTPUT" | egrep -q "$1" ; then                      
  echo "Still running: $1!"
else
  echo "Notify SLack"
  curl -X POST --data "payload={\"channel\": \"${SLACK_CHANNEL}\", \"username\": \"${SLACK_BOTNAME}\", \"text\": \"Finished: $1\"}" ${SLACK_URL}      
fi