# Non Delimited String search

**URL:** <https://discuss.elastic.co/t/non-delimited-string-search/73270>\
**Category:** Logstash\
**Created:** [January 30, 2017, 7:09pm UTC](https://discuss.elastic.co/t/non-delimited-string-search/73270 "2017-01-30T19:09:58Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![vinathan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vinathan/32/15002_2.png) [@vinathan](https://discuss.elastic.co/u/vinathan)\
**Post date:** [January 30, 2017, 7:09pm UTC](https://discuss.elastic.co/t/non-delimited-string-search/73270/1 "2017-01-30T19:09:58Z")

</div>

I have an incoming field designated as source with the following "/mnt/rsyslog\_custom/nagios-prod-na2-san3/nagios\_na2\_6065". I want to use logstash to remove all but "nagios-prod-na2-san3". Is there a way to accomplish this? I have a regex " \> /^(?:[^/]_/){3}([^/]_) "that works, but I don't know how to implement it using logstash.

---

<div class="post-metadata">

**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [February 1, 2017, 8:42pm UTC](https://discuss.elastic.co/t/non-delimited-string-search/73270/2 "2017-02-01T20:42:20Z")

</div>

Either use a mutate filter and its gsub option to strip the unwanted prefix or use a grok filter to extract the wanted piece to a new field.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 1, 2017, 8:42pm UTC](https://discuss.elastic.co/t/non-delimited-string-search/73270/3 "2017-03-01T20:42:25Z")

</div>

Closed on March 1, 2017, 8:42pm UTC

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.