# Filebeat hostname lowercase uppercase

**URL:** <https://discuss.elastic.co/t/filebeat-hostname-lowercase-uppercase/164231>\
**Category:** Beats\
**Tags:** filebeat\
**Created:** [January 15, 2019, 4:11am UTC](https://discuss.elastic.co/t/filebeat-hostname-lowercase-uppercase/164231 "2019-01-15T04:11:13Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![nayun\_oh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nayun_oh/32/46442_2.png) [@nayun\_oh](https://discuss.elastic.co/u/nayun_oh)\
**Post date:** [January 15, 2019, 4:11am UTC](https://discuss.elastic.co/t/filebeat-hostname-lowercase-uppercase/164231/1 "2019-01-15T04:11:13Z")

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Hi  
I find out that filebeat sometimes writes hostname in lowercase letters.  
I don't know why.  
Thank you in advance

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**Author:** ![shaunak](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/shaunak/32/6643_2.png) [@shaunak](https://discuss.elastic.co/u/shaunak)\
**Post date:** [January 15, 2019, 5:28am UTC](https://discuss.elastic.co/t/filebeat-hostname-lowercase-uppercase/164231/2 "2019-01-15T05:28:56Z")

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> [@nayun\_oh](#):
>
> I find out that filebeat sometimes writes hostname in lowercase letters.

Could you elaborate on this? Which hostname are you referring to? Maybe some examples will help.

Thanks,

Shaunak

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<div class="post-metadata">

**Author:** ![nayun\_oh](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nayun_oh/32/46442_2.png) [@nayun\_oh](https://discuss.elastic.co/u/nayun_oh)\
**Post date:** [January 15, 2019, 5:43am UTC](https://discuss.elastic.co/t/filebeat-hostname-lowercase-uppercase/164231/3 "2019-01-15T05:43:33Z")

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For example, actual hostname is 'TTS29' but filebeat wrote 'tts29'

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<div class="post-metadata">

**Author:** ![shaunak](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/shaunak/32/6643_2.png) [@shaunak](https://discuss.elastic.co/u/shaunak)\
**Post date:** [January 15, 2019, 5:55am UTC](https://discuss.elastic.co/t/filebeat-hostname-lowercase-uppercase/164231/4 "2019-01-15T05:55:00Z")

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Where is this hostname showing up? And where are you seeing the lowercase version? Could you share your `filebeat.yml` and the complete, exact filebeat command you ran?

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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:** [February 12, 2019, 5:55am UTC](https://discuss.elastic.co/t/filebeat-hostname-lowercase-uppercase/164231/5 "2019-02-12T05:55:06Z")

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