Postgres: could not open file "/etc/ssl/certs/ssl-cert-snakeoil.pem"

Hello,

Today I had a problem starting PostgreSQL server. I saw this error:

* The PostgreSQL server failed to start. Please check the log output:
CEST FATAL:  could not open file "/etc/ssl/certs/ssl-cert-snakeoil.pem"

To solve it I did these actions:

cd /etc/ssl/certs/
chown postgres ssl-cert-snakeoil.pem
chmod 777 ssl-cert-snakeoil.pem

cd /etc/ssl/private
chown postgres ssl-cert-snakeoil.key
chmod 700 ssl-cert-snakeoil.key

Best regards!!!