# How to update log msg with FileBeat

**URL:** <https://discuss.elastic.co/t/how-to-update-log-msg-with-filebeat/235237>\
**Category:** Beats\
**Tags:** filebeat\
**Created:** [June 1, 2020, 9:46pm UTC](https://discuss.elastic.co/t/how-to-update-log-msg-with-filebeat/235237 "2020-06-01T21:46:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![samyesz](https://avatars.discourse-cdn.com/v4/letter/s/d26b3c/32.png) [@samyesz](https://discuss.elastic.co/u/samyesz)\
**Post date:** [June 1, 2020, 9:46pm UTC](https://discuss.elastic.co/t/how-to-update-log-msg-with-filebeat/235237/1 "2020-06-01T21:46:16Z")

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I am new to FileBeat and I checked the document, yet seems can't find a way to update the log message from input log file to output log file.  
It seems to be I should be using one of the processors yet I tried some and still can't get it working. Is that possible someone can point me to the correct direction e.g. which processors that I should use, please?

I am hoping to update the log message from "begin of log file keyword to update end of log file" to "begin of log file UPDATED KEYWORD end of log file".

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [June 29, 2020, 9:46pm UTC](https://discuss.elastic.co/t/how-to-update-log-msg-with-filebeat/235237/2 "2020-06-29T21:46:18Z")

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