linux上安装mysql5.7
1、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
2、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
3、新建data目录
mkdir /usr/local/mysql/data
4、新建mysql用户、mysql用户组
# mysql用户组
groupadd mysql
# mysql用户
useradd mysql -g mysql
5、将/usr/local/mysql的所有者及所属组改为mysql
chown -R mysql.mysql /usr/local/mysql
6、配置
/usr/local/mysql/bin/mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data
# 如果出现以下错误：
2018-07-14 06:40:32 mysql_install_db is deprecated. Please consider switching to mysqld --initialize
2018-07-14 06:40:32 Child process: /usr/local/mysql/bin/mysqldterminated prematurely with errno= 32
2018-07-14 06:40:32 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# 完成后继续安装：/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize# 编辑/etc/my.cnf
datadir=/usr/local/mysql/databasedir=/usr/local/mysqlsocket=/tmp/mysql.sockuser=mysqlport=3306character-set-server=utf8
# 取消密码验证
skip-grant-tables# Disabling symbolic-links is recommended to prevent assorted security riskssymbolic-links=0# skip-grant-tableslog-error=/var/log/mysqld.logpid-file=/var/run/mysqld/mysqld.pid
7、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 start8、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;9、将/etc/my.cnf中的skip-grant-tables删除10、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;11、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;>>eixt;12、添加快捷方式ln -s /usr/local/mysql/bin/mysql /usr/bin
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