You can tune a file system, but you cannot tune a fish

https://man.freebsd.org/cgi/man.cgi?query=tunefs
https://unixhistory.livejournal.com/1808.html
Взято из man-а по tunefs.

    .\" Take this out and a Unix Demon will dog your steps from now until
    .\" the time_t's wrap around.
    .sp
    You can tune a file system, but you can't tune a fish.