[simple question] how to give access for log dir ?

Hello,

when i try to give access for flashmq user i didn't gain the access with chown flashmq:flashmq & chmod..

File '/var/log/flashmq/flashmq.log' is not there and can't be created, because '/var/log/flashmq' is also not writable

I'm not a linux expert so..

#Edit (not for this case)
For mTLS i also add SSL_CTX_use_certificate_chain_file in listener.cpp