下载tar包,这里使用wget从官网下载

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

将mysql安装到/usr/local/mysql下

# 解压
tar -xvf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz
# 移动
mv mysql-5.7.22-linux-glibc2.12-x86_64 /usr/local/
# 重命名
mv /usr/local/mysql-5.7.22-linux-glibc2.12-x86_64 /usr/local/mysql

新建data目录

mkdir /usr/local/mysql/data

新建mysql用户、mysql用户组

# mysql用户组
groupadd mysql
# mysql用户
useradd mysql -g mysql

将/usr/local/mysql的所有者及所属组改为mysql

chown -R mysql.mysql /usr/local/mysql

配置

/usr/local/mysql/bin/mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data

可能存在的错误

# 如果出现以下错误:
2018-07-14 06:40:32 [WARNING] mysql_install_db is deprecated. Please consider switching to mysqld --initialize
2018-07-14 06:40:32 [ERROR]   Child process: /usr/local/mysql/bin/mysqldterminated prematurely with errno= 32
2018-07-14 06:40:32 [ERROR]   Failed to execute /usr/local/mysql/bin/mysqld --bootstrap --datadir=/usr/local/mysql/data --lc-messages-dir=/usr/local/mysql/share --lc-messages=en_US --basedir=/usr/local/mysql
-- server log begin --

-- server log end --
# 则使用以下命令:
/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize

# 如果出现以下错误:
/usr/local/mysql/bin/mysqld: error while loading shared libraries: libnuma.so.1: cannot open shared object file: No such file or directory
# 则执行以下命令:
yum -y install numactl

继续安装

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

编辑/etc/my.cnf

[mysqld]
datadir=/usr/local/mysql/data
basedir=/usr/local/mysql
socket=/tmp/mysql.sock
user=mysql
port=3306
character-set-server=utf8
# 取消密码验证
skip-grant-tables
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# skip-grant-tables
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

开启服务

# 将mysql加入服务
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql
# 开机自启
chkconfig mysql on
# 开启
service mysql start

设置密码

# 登录(由于/etc/my.cnf中设置了取消密码验证,所以此处密码任意)
/usr/local/mysql/bin/mysql -u root -p
# 操作mysql数据库
use mysql;
# 修改密码
update user set authentication_string=password('你的密码') where user='root';
flush privileges;
exit;

# 添加远程访问
update user set Host='%' where User='root';

将/etc/my.cnf中的skip-grant-tables删除

登录再次设置密码(不知道为啥如果不再次设置密码就操作不了数据库了)

/usr/local/mysql/bin/mysql -u root -p
ALTER USER 'root'@'localhost' IDENTIFIED BY '修改后的密码';
exit;

允许远程连接

/usr/local/mysql/bin/mysql -u root -p
use mysql;
update user set host='%' where user = 'root';
flush privileges;
exit;

添加快捷方式

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

开机自启

cp /usr/local/mysql/support-files/mysql.server /etc/rc.d/init.d/mysqld
chmod +x /etc/init.d/mysqld
chkconfig --add mysqld
chkconfig --list


#off -> on 
chkconfig --level 345 mysqld on

image

卸载

find / -name mysql

image

删除mysql用户以及用户组

id mysql
userdel mysql