[randomswede]

These days, my main use of dd is to get a specific amount of data from a file, where both "bs" and "count" are useful (no, "bs" does not only set the buffer, it also sets the chunk size for reads and writes, this is SOMETIMEs useful and/or necessary with tapes).

So, this is an approximation of a command pipeline I run several times per year, when I happen to need a secret of an approximate length:

    dd if=/dev/urandom bs=6 count=1 | base64

Tune the "bs=6", depending on how long you want your (guaranteed typeable) secret to be. Every 3 bytes in the input will give you 4 characters in the output and keeping the input block size a multiple of 3 avoids having the output ending in "=".

It MAY be possible to replace this use of dd with other shell commands. But, since I needed to learn enough of dd to cope with tapes, I use that.