Hi, I am a new bee to this forum.

I am trying to extract the text after a matching pattern from a url using regular expression.

Ex:

http://locatlhost:2020/proxy/checkthisout

Do you want to extract the string or the sting?

man sed

You probably want something like:

sed -n 's/.*http:\/\/localhost:3030\/proxy\///p'

You can use regular expressions with more than one command.

Using plain old bash shell:

$
$ URL="http://localhost:2020/proxy/checkthisout"
$
$ echo ${URL##*/}
checkthisout
$
$ echo `expr "$URL" : '.*/\(.*$\)'`
checkthisout
$

$
$ echo "http://locatlhost:2020/proxy/checkthisout" | perl -ne 's#.*/##; print'
checkthisout
$

$
$ echo "http://locatlhost:2020/proxy/checkthisout" | awk 'sub(/.*\//,"")'
checkthisout
$