Installing selinux makes wordpress inaccessible

background:
my vps installed centos7, to build a wordpress blog through the Lnmp environment. Yesterday, I found that there were a lot of violent login attempts, so I planned to disable port 22. After following this article, I did not succeed in ssh login with the new port, but the blog could not be accessed. Ping can be connected to ping. I tried to disable selinux and found that
https://www.centos.bz/2017/08.

ask for advice on how to recover

Linux wordpress centos7 nignx
Mar.17,2021

found the problem. Just turn off the firewall
systemctl disable firewalld
systemctl stop firewalld

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b31fa6-2b62c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b31fa6-2b62c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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