This command can split a large_file to several files:
split -l 200 large_file prefix
cat large_file | split -l 200 prefix # this command doesn't work.
cat large_file | split -l 200 - prefix # - means stdin
This is pretty conventional in many Unix programs:
- means stdin (or stdout if it were an output file). So much so that some programs don't even document the behavior, though
man split does:
With no FILE, or when FILE is -, read standard input.