sed extract digits

Question

I try to extract digits with sed:

echo hgdfjg678gfdg kjg45nn | sed 's/.*\([0-9]\+\).*/\1/g'

but result is: 5 How to extract: 678 and 45? Thanks in advance!

Answer 1

You may use grep with option -o for this:

$ echo hgdfjg678gfdg kjg45nn | grep -E -o "[0-9]+"
678
45