problems with mysql instance

[AO SH]

Hi every one,

I was trying to create another mysql instance but I faced a problem.
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My OS VERSION is:
REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7"
REDHAT_BUGZILLA_PRODUCT_VERSION=7.6
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="7.6"

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My MySQL version is: mysql Ver 14.14 Distrib 5.7.25, for Linux (x86_64) using EditLine wrapper
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These are the steps I followed:

# mkdir /var/lib/mysql2
# chown -R mysql:mysql /var/lib/mysql2/

# cp /etc/my.cnf /etc/my2.cnf
# vim /etc/my2.cnf

# I added these configurations to my2.cnf:

port=3307
datadir=/var/lib/mysql2
socket=/var/lib/mysql2/mysql.sock
log-error=/var/log/mysqld2.log
pid-file=/var/run/mysqld/mysqld2.pid
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* Finally we need to initialize the default dbs:

# mysql_install_db --user=mysql --datadir=/var/lib/mysql2/


* now we need to start our new mysql instance:

# mysqld_safe --defaults-file=/etc/my2.cnf &

off course, since red hat does not have the command mysqld_safe, I used mysqld instead as follows:

# sudo mysqld --defaults-file=/etc/my2.cnf

but I got this Error:

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2019-08-06T12:30:33.186698Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2019-08-06T12:30:33.188932Z 0 [Note] mysqld (mysqld 5.7.25) starting as process 3017 ...
2019-08-06T12:30:33.190869Z 0 [ERROR] Fatal error: Please read "Security" section of the manual to find out how to run mysqld as root!

2019-08-06T12:30:33.190906Z 0 [ERROR] Aborting

2019-08-06T12:30:33.190932Z 0 [Note] Binlog end
2019-08-06T12:30:33.191009Z 0 [Note] mysqld: Shutdown complete


###########################


please, your support regarding this matter