# New to Percona - need help starting server

**URL:** <https://forums.percona.com/t/new-to-percona-need-help-starting-server/3568>\
**Category:** Other MySQL® Questions\
**Created:** [June 24, 2014, 1:40pm UTC](https://forums.percona.com/t/new-to-percona-need-help-starting-server/3568 "2014-06-24T13:40:59Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![miguelangelnieto](https://avatars.discourse-cdn.com/v4/letter/m/b9e5f3/32.png) [@miguelangelnieto](https://forums.percona.com/u/miguelangelnieto)\
**Post date:** [June 26, 2014, 2:50pm UTC](https://forums.percona.com/t/new-to-percona-need-help-starting-server/3568/2 "2014-06-26T14:50:59Z")

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140624 15:08:00 [ERROR] /usr/sbin/mysqld: Can’t find file: ‘./mysql/host.frm’ (errno: 13)  
140624 15:08:00 [ERROR] Fatal error: Can’t open and lock privilege tables: Can’t find file: ‘./mysql/host.frm’ (errno: 13)

Error 13 means “Permission denied” Check if those two files exist and if they are owned by mysql user and group.

If you moved from 5.6 to 5.5, then that’s a downgrade. Check this link please:

[url][http://dev.mysql.com/doc/refman/5.6/en/downgrading-to-previous-series.html[/url]](http://dev.mysql.com/doc/refman/5.6/en/downgrading-to-previous-series.html%5B/url%5D)

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