In a service file I can use: StandardOutput=append:/var/log/root/aptCacheUsage.log
but I want to use something like: StandardOutput=append:/var/log/root/aptCacheUsage_$(date +%%Y-%%m).log Did does not work, because this puts it in: /var/log/root/aptCacheUsage_$(date +%Y-%m).log Is there a way I can put it in: /var/log/root/aptCacheUsage_2023-08.log while it would automatically next month go into: /var/log/root/aptCacheUsage_2023-09.log I could of-course put it into: /var/log/root/aptCacheUsage.log and at the beginning of the month move it if it exists with a timed service, but I really would not like that kind of solution. -- Cecil Westerhof