Mysql installation method in CentOS

Mysql deployment document

Operating system: CentOS Linux release 7.4.1708
Kernel version: 3.10.0

# Manual installation
1> Mysql-5.5.54 -linux2.6-x86_64.tar.gz Upload to the CentOS server/tmp directory

2> Unzip the compressed package to /usr/local/

[root@localhost local]# tar -zxvf /tmp/mysql-5.5.54-linux2.6-x86_64.tar.gz -C /usr/local/

3> Set up soft connection

[root@localhost local]# ln -s mysql-5.5.54-linux2.6-x86_64/ mysql

4> Add user group and user

[root@localhost local]# groupadd -r mysql
[root@localhost local]# useradd -g mysql -r -s /sbin/nologin mysql

5> Give/ usr/local/mysql/*Permissions

##

[root@localhost local]# chown -R mysql.mysql /usr/local/mysql/*

6> Set the data storage path and grant permissions

[root@localhost local]# mkdir –p /data/mydata
[root@localhost local]# chown -R mysql.mysql /data/mydata

7> Initialize mysql

[root@localhost local]# cd /usr/local/mysql
[root@localhost local]# scripts/mysql_install_db --datadir=/data/mydata --user=mysql

8> Change back to root permission

##

[root@localhost local]# chown -R root /usr/local/mysql/*

9> Join automatic startup

[root@localhost local]# cp -a mysql/support-files/mysql.server /etc/rc.d/init.d/mysqld
[root@localhost local]# chkconfig --add mysqld

10> Modify the configuration file

[root@localhost local]# cp -a /usr/local/mysql/support-files/my-large.cnf /etc/my.cnf
[root@localhost local]# vi /data/mydata

Add datadir = /data/mydata

under the [mysqld] field thread_concurrency = 2 times the number of physical CPU cores

Save, exit /etc/my.cnf
##11> Start the mysql service

##

[root@localhost local]# /etc/rc.d/init.d/mysqld start

12> Create root user password

*Log in to mysql first

[root@localhost local]# mysql -uroot -hlocalhost -p
Enter password:

*Continuing from above, Enter password:

(press Enter directly)
*Set password, Assume the password is: zz2014info

##

mysql> SET PASSWORD FOR 'root'@'localhost'=PASSWORD('zz2014info');

*If it is displayed as follows, it means the password is created successfully

Query OK, 0 rows affected (0.14 sec)

13> Create mysql Example

*Create a mysql instance, such as logincenter

********************************* *******************************

******************mysql instance The name is case sensitive*********************

******************** The development side uses lowercase letters ******************************
**************** ****Ignore case configurable******************************
************ ***************************************************

mysql> CREATE DATABASE logincenter；
Query OK, 1 row affected (0.01 sec)

*Check whether the instance is created successfully

mysql> SHOW DATABASES;+--------------------+
| Database |
+--------------------+
| information_schema |
| logincenter |
| mysql |
| performance_schema |
| test |
+--------------------+

14> Add the mysql command to the environment variable

[root@localhost local]# echo "PATH=$PATH:/usr/local/mysql/bin" > /etc/profile.d/mysql.sh[root@localhost local]# echo "export PATH" >> /etc/profile.d/mysql.sh[root@localhost local]# source /etc/profile

15> Import .sql statement script (take logincenter.sql as an example)

[root@localhost local]# mysql -uroot -pzz2014info logincenter < /tmp/logincenter.sql

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