Linux上安装MySQL(CentOS)

我不是女神ヾ 2022-03-15 03:22 256阅读 0赞

1、下载

下载地址：http://dev.mysql.com/downloads/mysql/5.6.html\#downloads

wget http://dev.mysql.com/get/Downloads/MySQL-5.6/mysql-5.6.33-linux-glibc2.5-x86_64.tar.gz

2、解压

tar -zxvf mysql-5.6.33-linux-glibc2.5-x86_64.tar.gz

cp -r mysql-5.6.33-linux-glibc2.5-x86_64 /usr/local/mysql

3、添加用户组和用户

#添加用户组
    groupadd mysql
    #添加用户mysql 到用户组mysql
    useradd -g mysql mysql

4、安装

yum -y install autoconf
    yum install libaio* -y
    
    cd /usr/local/mysql/
    mkdir ./data/mysql
    chown -R mysql:mysql ./
    ./scripts/mysql_install_db --user=mysql --datadir=/usr/local/mysql/data/mysql
    cp support-files/mysql.server /etc/init.d/mysqld
    chmod 755 /etc/init.d/mysqld
    cp support-files/my-default.cnf /etc/my.cnf
    
    #修改启动脚本
    vi /etc/init.d/mysqld
     
    #修改项：
    basedir=/usr/local/mysql/
    datadir=/usr/local/mysql/data/mysql
    
    
     
    #启动服务
    service mysqld start
     
    #测试连接
    ./mysql/bin/mysql -uroot
     
    #加入环境变量，编辑 /etc/profile，这样可以在任何地方用mysql命令了
    export PATH=$PATH:/usr/local/mysql//bin
    source /etc/profile
     
     
    #启动mysql
    service mysqld start
    #关闭mysql
    service mysqld stop
    #查看运行状态
    service mysqld status

修改用户密码

方式一：mysqladmin -uroot -p password '123456'
    方式二：mysql> set password for root@localhost = password('123456');

5、Q&A

5.1 sqlyog连接时，报1130错误，是由于没有给远程连接的用户权限问题

解决1:更改 ‘mysql’数据库‘user’表‘host’项，从‘localhost’改成‘%’。

use mysql;
    select 'host' from user where user='root'; 
    update user set host = '%' where user ='root';
    flush privileges;

5.2 cannot open shared object file:

root@bigdata-159:/usr/local/mysql\# ./bin/mysqld -- defaults-file=/etc/my.cnf --initialize --user=mysql  
./bin/mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory

yum install -y libaio  //安装后在初始化就OK了

5.3 密码错误，重置密码

vim /etc/my.cnf

在\[mysqld\]后面任意一行添加“skip-grant-tables”用来跳过密码验证的过程

[mysqld]
    skip-grant-tables
    max_connections=5000

重启mysql服务并登录mysql

mysql> update user set password=password("newpassword") where user="root";
    mysql> flush privileges;
    mysql> quit

注意：如果在执行该步骤的时候出现ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement 错误。则执行下 flush privileges 命令，再执行该命令即可。

编辑my.cnf,去掉刚才添加的内容，然后重启MySQL。大功告成！

5.4 Installing MySQL system tables..../bin/mysqld: error while loading shared libraries: libnuma.so.1: cannot open shared object file: No such file or directory

yum -y install numactl