Replace Strings Using Sed And Regex

Question

I\'m trying to uncomment file content using sed but with regex (for example: [0-9]{1,5})

# one two 12
# three four 34
# five six 56

The fol

Answer 1

I find it. thanks to all of you

echo "# one two 12" | grep "[0-9]" | sed 's/# //g'

or

cat file | grep "[0-9]" | sed 's/# //g'