Linux Installation MySQL (pit filling version)

Before installation , First check whether the system has been installed mysql：

rpm -qa | grep mysql

If installed , You can choose to uninstall through the following command ：

rpm -e mysql // Normal delete mode rpm -e --nodeps mysql // Strong delete mode , If you use the above command to delete , Prompt for other dependent files , It can be forcefully deleted with this command

 

install Mysql

Tools ：CentOS 7 64 position 、Mysql5.7

 

1 Download from the official website mysql Compiled binary installation package

choice 64 Bit system download Linux - Generic (glibc 2.5) (x86, 64-bit).

2  Unzip the installation package

Enter the directory where the installation package is located , Unzip the installation package ：

tar -zxvf mysql-5.7.10-linux-glibc2.5-x86_64.tar.gz

3  Copy the decompressed mysql Directory to the local software directory of the system

Be careful ： Don't add /

mv mysql-5.7.10-linux-glibc2.5-x86_64  /usr/local/mysql

4 Add system mysql Group and mysql user

Carry out orders ：groupadd mysql and useradd -r -g mysql mysql

5 mount this database

5.1 Create a data directory and give permissions :

mkdir -p /data/mysql chown mysql:mysql -R /data/mysql

5.2 To configure my.cnf：

vim /etc/my.cnf

The contents are as follows ：

[mysqld] bind-address=0.0.0.0 port=3306 user=mysql basedir=/usr/local/mysql datadir=/data/mysql socket=/tmp/mysql.sock log-error=/data/mysql/mysql.err pid-file=/data/mysql/mysql.pid #character config character_set_server=utf8mb4 symbolic-links=0 explicit_defaults_for_timestamp=true

5.3 Initialize database

Get into mysql Of bin Catalog ：cd /usr/local/mysql/bin

initialization

./mysqld --defaults-file=/etc/my.cnf --basedir=/usr/local/mysql/ --datadir=/data/mysql/ --user=mysql --initialize

5.4 Boot up mysql service

Put the startup script into the startup initialization directory ：

cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql

Give executable permission ：chmod +x /etc/init.d/mysql

Add as a service : chkconfig --add mysql

View the list of services :  chkconfig --list mysql

notice 3、4、5 The status is on or on That means success . If it is Off or off Then execute ：chkconfig --level 345 mysqld on

5.5 start-up

start-up mysql

service mysql start

ps -ef|grep mysql notice mysql Service description started successfully , Pictured

So let's go over here mysql It has been installed successfully ！

5.6 Change Password

The following changes mysql password , Log in first mysql, The initial password is empty , If you cannot log in successfully ：

be , Stop service first ：/etc/init.d/mysql stop

And then into mysql Install under directory bin Catalog , perform ：

./mysqld_safe --user=mysql --skip-grant-tables --skip-networking &

Log in again mysql -u root -p, You can log in . Here's the picture

Execute after entering ：mysql> flush PRIVILEGES;

Reset password ： mysql> alter user 'root'@'localhost' identified by '1234567';

perform mysql>fulsh tables; sign out . You can use the new password when logging in again .

5.7 mysql Allow remote access

First, turn off the server firewall .

Sign in mysql, see mysql In the library user Tabular host Field

Host Field ,localhost Indicates that only local access is allowed , To achieve a remote connection , Need to put root User host Change it to % To allow to be arbitrary host visit . Then use the command mysql> flush privileges; Make this amendment effective immediately .

Connect remotely again , success ！