# TODO

## easy cert revocation

here comes an example for watching file changes  
the idea is to extend the step-ca container to be able to revoke certificates easily.  
not that i think this is needed 0:-)

source: https://stackoverflow.com/questions/22884580/bash-a-way-to-watch-files-for-changes#22885210

```bash
#!/bin/bash

watched_files=$@  # pass watched files as cmd line arguments

if [ -z "$watched_files" ]; then
  echo "Nothing to watch, abort"
  exit
else
  echo "watching: $watched_files"
fi

previous_checksum="dummy"
while [ 1 ]; do
  checksum=$(md5sum $watched_files | md5sum)
  if [ "$checksum" != "$previous_checksum" ]; then
    echo "None shall pass!"  # do your stuff here
  fi
  previous_checksum="$checksum"
  sleep 1
done
```