Hi awurebarry:
I hope you are fine.
I have tried in my lab and the command works fine.
First, ensure that file is there and has the proper permissions to be executed:
# ls -l
/etc/wazuh-indexer# /usr/share/wazuh-indexer/bin/
The "runuser" command might not be available in the default Debian installation.
Please, consider that Wazuh supports these operating systems:
I hope this helps.
Thanks