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

sed -e 's/^#\s*\(.*[0-9].*\)$/\1/g' filename

should do it.