MySQL安装二：linux下安装MySQL

1 上传mysql-5.7.26-linux-glibc2.12-x86_64.tar.gz至目录/usr/local

2 解压，重命名

tar xf mysql-5.7.26-linux-glibc2.12-x86_64.tar.gz
mv mysql-5.7.26-linux-glibc2.12-x86_64 mysql

3 创建mysql用户，添加环境变量

useradd mysql
vim /etc/profile
export PATH=/usr/local/mysql/bin:$PATH
source /etc/profile

检查是否成功 mysql -V

 4 创建数据目录并授权

mkdir -p /data/mysql/data
chown -R mysql.mysql /data/mysql/data /usr/local/mysql

5 初始化

mysqld --initialize-insecure --basedir=/usr/local/mysql --datadir=/data/mysql/data --user=mysql

如果出现如下错误：

 这是没有安装libaio-devel 软件包所致，安装：yum install -y libaio-devel

安装完后再执行初始化命令，结果如下：

 root@localhost is created with an empty password !

6 编写配置文件

[root@izwz94fgyfy9i6g659owj8z local]# rm -f /etc/my.cnf
[root@izwz94fgyfy9i6g659owj8z local]# cat >/etc/my.cnf<<EOF
> [mysqld]
> user=mysql
> basedir=/usr/local/mysql
> datadir=/data/mysql/data
> socket=/tmp/mysql.sock
> [mysql]
> socket=/tmp/mysql.sock
> EOF

7 启动

[root@izwz94fgyfy9i6g659owj8z support-files]# cd /usr/local/mysql/support-files/
[root@izwz94fgyfy9i6g659owj8z support-files]# ./mysql.server start

 8 使用service管理启停

./mysql.server stop
cp mysql.server /etc/init.d/mysqld

 9 使用systemd管理mysql

cat > /etc/systemd/system/mysqld.service <<EOF
[Unit]
Description=MySQL Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
ExecStart=/usr/local/mysql/bin/mysqld --defaults-file=/etc/my.cnf
LimitNOFILE = 5000
EOF