How to extract numbers from a string?

You can use tr to delete all of the non-digit characters, like so:

echo toto.titi.12.tata.2.abc.def | tr -d -c 0-9

linux bash shell substring sh

To extract all the individual numbers and print one number word per line pipe through -

tr '\n' ' ' | sed -e 's/[^0-9]/ /g' -e 's/^ *//g' -e 's/ *$//g' | tr -s ' ' | sed 's/ /\n/g'

Breakdown:

Example:

echo -e " this 20 is 2sen\nten324ce 2 sort of" | tr '\n' ' ' | sed -e 's/[^0-9]/ /g' -e 's/^ *//g' -e 's/ *$//g' | tr -s ' ' | sed 's/ /\n/g'

Will print out

linux bash shell substring sh

Here is a short one:

string="toto.titi.12.tata.2.abc.def"id=$(echo "$string" | grep -o -E '[0-9]+')echo $id // => output: 12 2

with space between the numbers.Hope it helps...

CodeHunter