Orenef11 opened a new pull request #13:
URL: https://github.com/apache/cassandra-harry/pull/13
The correct way to check if variable is set is:
```bash
if [ -z ${var+x} ]; then
echo "var is unset"
else
echo "var is set to '$var'"
fi
```
For more information please check the following link:
https://stackoverflow.com/questions/3601515/how-to-check-if-a-variable-is-set-in-bash
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