[tlug] sed or awk or what?

[Sven Simon <sven@example.com>]

Here's a quick one:

I have a file where I'd like to change the 9th field on the second line
to, say, 70. Field seperator is space. I would think to go with sed and
do some sort of substitution, but I couldn't figure the right regex.

I know, it's probably a oneliner in perl, but I try to deepen my shell
scripting knowledge. So, someone please lead me in the right direction.

Cheers,