How to extract a part of a line by sed?
 

I have a variable that contains the following line of text:

someusername-sixdigitsofrandomnumbers

How can I extract someusername from this line by sed?

Naturally, someusername and the six digits of random numbers may change, only the '-' separator between them is always unchanged.

(I could do the task in a bash script without sed, but this would be used in a procmailrc file, where I do not think the same construct would work, so I'd prefer sed)

is that what you're after? that's a very trivial regex, have an experiment to see what you can do with them.

in actual fact.... the username could contain numbers no? so assuming it won't have a - in it (no sure if it's actaully possbile of not.. guess it should be: you might want to keep adding certain checks etc...

I choosed the second solution, and it works.
Thanks!