How to extract numbers from a string?

Question

I have string contains a path

string=\"toto.titi.12.tata.2.abc.def\"

I want to extract only the numbers from this string.

To extrac

Answer 1

You can also use sed:

echo "toto.titi.12.tata.2.abc.def" | sed 's/[0-9]*//g'

Here, sed replaces

• any digits (class [0-9])
• repeated any number of times (*)
• with nothing (nothing between the second and third /),
• and g stands for globally.

Output will be:

toto.titi..tata..abc.def