Centos7 installation MySQL is stuck. After typing: sudo systemctl start mysqld, the cursor stops there. - Codes Helper - Programming Question Answer

Centos7 installation MySQL is stuck. After typing: sudo systemctl start mysqld, the cursor stops there.

referenced tutorials:
https://www.digitalocean.com/.
https://linode.com/docs/datab.

Environment: cetnos7,openresty, has been installed and php7,info.php also appears normal. Previously installed mariadb, and uninstalled, now install mysql5.5

the process of executing a command:

< H1 > sudo yum install mysql-server < / H1 >

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base: mirror.atlanticmetro.net
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updates: mirror.atlanticmetro.net
webtatic: us-east.repo.webtatic.com

Package mysql-community-server-5.5.59-2.el7.x86_64 already installed and latest version
Nothing to do

< H1 > sudo systemctl start mysqld < / H1 >

(after entering this command, the cursor is stuck here)

could you tell me the specific solution?

Screenshot of

/ var/log/mysqld.log:

Screenshot of

/ etc/my.cnf configuration:
https://i.imgur.com/e4TYUED.png

Mar.03,2021

/ usr/bin/mysql_secure_installation
follow the prompts to enter enter
and then enter 4 y
and then sudo systemctl status mysqld

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