CentOS7.5离线安装MySQL5.7

我系统是centos7.5，安装的mysql版本是mysql-5.7.38

1. 下载MySQL5.7

下载地址：https://dev.mysql.com/downloads/mysql/#downloads

2. 删除原来安装的mysql

1. 查询原来的MySQL

rpm -qa | grep -i mysql

find / -name mysql

2. 删除查询出来的（这是我自己的删除）

rm -rf /home/mysql
rm -rf /home/mysql/mysql-5.6.33-linux-glibc2.5-x86_64/bin/mysql
rm -rf /home/mysql/mysql-5.6.33-linux-glibc2.5-x86_64/include/mysql
rm -rf /etc/selinx/targeted/active/modules/100/mysql
rm -rf /var/spool/mail/mysql
rm -rf /usr/lib64/mysql
rm -rf /usr/share/mysql
rm -rf /usr/local/mysql
rm -rf /usr/local/mysql/data/mysql
rm -rf /usr/local/mysql/data/mysql/mysql
rm -rf /usr/local/mysql/bin/mysql
rm -rf /usr/localmysql/include/mysql
rm -rf /usr/local/mysql/mysql

3. 检查自带的mariadb并删除

#查看
rpm -qa|grep mariadb

#删除
yum remove mariadb-libs

4. 把下载的mysql上传到/opt并解压缩

tar -zxvf mysql-5.7.38-el7-x86_64.tar.gz

5. 移动并重命名

mv mysql-5.7.38-el7-x86_64/ /usr/local/mysql

注意：这步会将mysql-5.7.38-el7-x86_64重命名为mysql并放到/usr/local目录下

6. 修改权限为mysql组、用户

#添加组
groupadd mysql
#添加用户
useradd -g mysql mysql
#将文件的所有属性改为mysql用户
chown -R mysql /usr/local/mysql

查看添加的mysql用户情况：

id mysql

7. 配置my.cnf文件

进入目录/usr/local/mysql/support-files/发现没有my_default.cnf文件，自己从网上找了个，改成自己需要的配置，放到**/etc/my.cnf**

my.cnf

[mysqld]
#设置mysql的安装目录
basedir =/usr/local/mysql
#设置mysql数据库的数据存放目录
datadir = /usr/local/mysql/data
#设置端口
port = 3306

socket = /tmp/mysql.sock
#设置字符集
character-set-server=utf8
#日志存放目录
log-error = /usr/local/mysql/data/mysqld.log
pid-file = /usr/local/mysql/data/mysqld.pid
#允许时间类型的数据为零(去掉NO_ZERO_IN_DATE,NO_ZERO_DATE)
sql_mode=ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
default-time_zone = +8:00
max_allowed_packet = 20M

8. 初始化mysql

在/usr/local/mysql目录下初始化mysql

cd /usr/local/mysql
./bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data/

9. 查看日志获得mysql初始化密码

cat /usr/local/mysql/data/mysqld.log

10. 登录服务、修改密码

1. 先启动服务： 进入目录：/usr/local/mysql/support-files

./mysql.server start

2. 登录服务，修改密码

#进入/usr/local/mysql/bin目录
cd /usr/local/mysql/bin

#登录mysql
./mysql -uroot -p

输入第9步得到的mysql密码

mysql>set password for root@localhost = password(root);
mysql>GRANT ALL PRIVILEGES ON *.* TO root@% IDENTIFIED BY root WITH GRANT OPTION;
mysql>FLUSH PRIVILEGES;
mysql>exit;

11. 启动mysql

#复制mysql.server到/etc/init.d/重命名为mysqld
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld

#将mysql注册为开启启动的服务
chkconfig --add mysqld

12. mysql启停常用命令

1. 启动mysql

service mysql start

2. 停止mysql

service mysql stop

3. 重启mysql

service mysql restart

4. 查看mysql状态

service mysql status

也可以使用:

#启动
systemctl start mysql

#停止
systemctl stop mysql

#重启
systemctl restart mysql

#查看状态
systemctl status mysql