卸載MySQL

卸載MySQL5.7

1、關閉MySQL5.7服務

service mysqld stop

2、查看MySQL安裝

rpm -qa|grep -i mysql

mysql-community-libs-5.7.35-1.el7.x86_64

mysql-community-libs-compat-5.7.35-1.el7.x86_64

mysql-community-common-5.7.35-1.el7.x86_64

mysql57-community-release-el7-11.noarch

mysql-community-server-5.7.35-1.el7.x86_64

mysql-community-client-5.7.35-1.el7.x86_64

?3、卸載MySQL服務

rpm -ev --nodeps?mysql-community-libs-5.7.35-1.el7.x86_64
rpm -ev --nodeps?mysql-community-libs-compat-5.7.35-1.el7.x86_64
rpm -ev --nodeps?mysql-community-common-5.7.35-1.el7.x86_64
rpm -ev --nodeps?mysql57-community-release-el7-11.noarch
rpm -ev --nodeps?mysql-community-server-5.7.35-1.el7.x86_64
rpm -ev --nodeps?mysql-community-client-5.7.35-1.el7.x86_64

4、查看MySQL服務

rpm -qa|grep -i mysql

安裝MySQL5.7

?1、準備MySQL5.7安裝包

mysql-5.7.35-linux-glibc2.12-x86_64.tar.gz

上傳文件至/opt/

?2、解壓文件

tar -xvf mysql-5.7.35-linux-glibc2.12-x86_64.tar.gz

3、移動并重命名

mv mysql-5.7.26-linux-glibc2.12-x86_64 /usr/local/mysql

4、創建mysql用戶組和用戶并修改權限

groupadd mysql
useradd -r -g mysql mysql

5、創建數據目錄并賦予權限

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

6、配置my.cnf

vim /etc/my.cnf

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

?7、初始化數據庫

7.1 進入mysql的bin目錄

cd /usr/local/mysql/bin/

7.2 初始化

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

7.3 查看密碼

cat /data/mysql/mysql.err

??

?8、啟動mysql并修改root密碼

8.1 將mysql.server復制至/etc/init.d/mysql

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

8.2 啟動mysql服務

service mysql start
ps -ef | grep mysql

8.3 登錄mysql

./mysql -u root -p   #bin目錄下

8.4 修改密碼

SET PASSWORD = PASSWORD('root');
ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;
FLUSH PRIVILEGES; 

Q:Client does not support....consider upgrading Mysql client 的解決辦法

?

USE mysql;
ALTER USER ‘root’@‘localhost’ IDENTIFIED WITH mysql_native_password BY ‘你自己的密碼’;
FLUSH PRIVILEGES;

8.5 設置允許遠程登錄

use mysql
update user set host = '%' where user = 'root'; 
FLUSH PRIVILEGES;  

9、配置命令環境（鏈接文件）

ln -s  /usr/local/mysql/bin/mysql    /usr/bin