目录
步骤一：将mysql安装包上传到/usr/local/下并解压
步骤四：将解压后的mysql的安装包更改用户和组为mysql
提示：本次安装是基于Linux CentOS 7的环境。
步骤一：将mysql安装包上传到/usr/local/下并解压
# cd /usr/local
# tar -zxvf mysql-5.7.26-linux-glibc2.12-x86_64.tar.gz -C /usr/local将解压后的mysql的tar包更改名称为mysql
# mv mysql-5.7.26-linux-glibc2.12-x86_64/ mysql
步骤二：查看系统自带的Mariadb并卸载
# rpm -qa|grep mariadb
# rpm -e --nodeps mariadb-libs-5.5.56-2.el7.x86_64(根据实际情况复制rpm包)删除/etc目录下的my.cnf（有就删除）
# rm /etc/my.cnf检查mysql是否存在# rpm -qa |grep mysql步骤三：检查mysql的组和用户是否存在，如无则创建
检查用户和组：# cat /etc/group | grep mysql
# cat /etc/passwd | grep mysql创建用户和组：# groupadd mysql
# useradd -g mysql mysql
# passwd mysql （输入密码密码设置成123456）步骤四：将解压后的mysql的安装包更改用户和组为mysql
# cd /usr/local
# chown -R mysql:mysql mysql/ 在mysql文件夹下创建data目录，并修改用户和组的权限都为mysql# cd /usr/local/mysql
# mkdir data
# chown -R mysql:mysql data步骤五：在/etc下创建my.cnf文件
# cd /usr/local/mysql
# vim my.conf[mysql]
socket=/var/lib/mysql/mysql.sock# set mysql client default chararterdefault-character-set=utf8
[mysqld]
socket=/var/lib/mysql/mysql.sock# set mysql server port
port = 3323 #默认是3306，这里发现3306已经被占用，因此防止这种情况发生，可以避免使用3306mysql默认端口
# set mysql install base dir
basedir=/usr/local/mysql# set the data store dir
datadir=/usr/local/mysql/data# set the number of allow max connnection
max_connections=200# set server charactre default encoding
character-set-server=utf8# the storage enginedefault-storage-engine=INNODB
lower_case_table_names=1
max_allowed_packet=16M
explicit_defaults_for_timestamp=true
[mysql.server]
user=mysql
basedir=/usr/local/mysql# chown -R mysql:mysqsl my.cnf
#chmod 777 my.conf步骤六：进入mysql文件夹，安装mysql
# cd /usr/local/mysql
# bin/mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data/
# cp ./support-files/mysql.server /etc/init.d/mysqld
# chmod a+x /etc/init.d/mysqld步骤七：配置环境变量
# vim /etc/profileexport PATH=$PATH:/usr/local/mysql/bin# source /etc/profile步骤八：启动mysql
# service mysqld start查看状态：# service mysqld status步骤九：登录mysql并设置基础环境
获取mysql初始密码：#cat /root/.mysql_secret登录：# mysql -u root -p (输入刚才查出的密码)更改密码：mysql> set PASSWORD = PASSWORD('123456');刷新保存设置：mysql> flush privileges;设置root用户的远程登录：mysql>grant all on *.* to root@'%' identified by '123456';
mysql> flush privileges;
mysql> select user,host from user;
mysql> delete from user where user='root' and host='localhost';
mysql> select user,host from user;
mysql> flush privileges; 步骤10：重启mysql
# service mysqld restart