Get number string as output from a paragraph string

Question

I have a output stored in a variable that comes from a .jar script

Token is: XYZ123
Not found in page: 0
Not found in page: 1
Not found in page: 2
Found with ID : #14214733

Now I want to extract the ID after # i.e 14214733 and want to store it in another variable, how do I do that in bash?

EDIT: Solved using echo ${var##*#}

Answer 1

With bash, capture it with a regular expression

output='Token is: XYZ123
Not found in page: 0
Not found in page: 1
Not found in page: 2
Found with ID : #14214733'

[[ $output =~ "Found with ID : #"([0-9]+) ]] && id=${BASH_REMATCH[1]}

echo $id    # => 14214733

In bash regular expressions, the literal text parts are quoted, and the regex-special stuff is not. Captured parts go into the BASH_REMATCH array.

Answer 2

One way would be:

sec_var=`cat ts.txt | grep -oE 'ID : #([0-9]+)' | cut -f2 -d '#'`
sec_var=`echo $first_var | grep -oE 'ID : #([0-9]+)' | cut -f2 -d '#'`

Also you can use grep "-z" option:

-z suppress newline at the end of line, substituting it for null character. That is, grep knows where end of line is, but sees the input as one big line.