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  • linux安装mysql(yum安装,比较简单)

    1.查看是否安装了MySQL数据库

    # rpm -qa | grep mysql
    

    <--------------------------------------------
    将剩余mysql目录删除干净(安装失败后尝试)

    复制代码
    [root@node2 mysql-5.7.26]# find / -name mysql
    /etc/selinux/targeted/active/modules/100/mysql
    /var/lib/mysql
    /var/lib/mysql/mysql
    /usr/share/mysql
    --------------------------------------------->

    2.卸载过程

    首先需要先停止mysqld服务,否则直接卸载rpm包后,重新安装的mysql没有初始密码
    [root@node2 mysql-5.7.26]# service mysqld stop
    [root@node2 mysql-5.7.26]# rpm -qa|grep mysql

    卸载有两种方式,一种是普通删除,另一种是强力删除,当MySQL数据库有其它的依赖文件时,也进行删除。
    rpm -e mysql和rpm -e --nodeps mysql

    3.安装过程

    首先,我们通过命令:yum list | grep mysql来查看yum上提供的数据库可下载版本。

    32位系统 选择安装 mysql.i686,mysql-devel.i686,mysql-server.i686就行了。
    64位系统 选择安装 mysql.x86_64 mysql-server.x86_64 mysql-devel.x86_64

    yum -y install mysql.x86_64 mysql-server.x86_64 mysql-devel.x86_64

    4.启动mysql
    启动方式:service mysqld start 第一次启动会初始化数据库
    关闭方式:service mysqld stop

    启动报错
    Initializing MySQL database:
    FATAL ERROR: Could not find mysqld

    The following directories were searched:

    /usr/local/mysql/libexec
    /usr/local/mysql/sbin
    /usr/local/mysql/bin
    

    If you compiled from source, you need to run 'make install' to
    copy the software into the correct location ready for operation.

    If you are using a binary release, you must either be at the top
    level of the extracted archive, or pass the --basedir option
    pointing to that location.

                                                           [FAILED]
    

    yum安装时警告warning: /etc/my.cnf created as /etc/my.cnf.rpmnew

    由于原来的/etc/my.cnf存在,安装前应该删除

    我们可以使用命令:
    chkconfig --list | grep mysqld 来查看是否开机自动启动。如果2~5的都是 on 或者是启用
    说明是开机自动启动,否则如果不是。我们可以通过命令
    chkconfig mysqld on 来设置成开机自动启动。

    5.修改root密码

    进入mysql 至此mysql安装完毕
    mysql

    如果报错-bash: /usr/local/mysql/bin/mysql: No such file or directory
    mkdir /usr/local/mysql/bin/ -p
    cp /usr/bin/mysql /usr/local/mysql/bin/

    退出mysql 修改密码(此时只是退出mysql,不能关掉mysql服务,否则将修改失败)

    修改root密码
    /usr/bin/mysqladmin -u root password 你的密码

    6.远程连接设置

    首先要开放 3306 端口 打开防火墙文件

    vim /etc/sysconfig/iptables

    开放3306端口

    -A INPUT -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT
    重启iptables服务
    service iptables restart;

    进入mysql,授权远程连接
    GRANT ALL PRIVILEGES ON . TO ‘root’@’%’ IDENTIFIED BY ‘root’ WITH GRANT OPTION;
    FLUSH PRIVILEGES;

    GRANT ALL PRIVILEGES ON . TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;
    刷新权限

    flush privileges;

    mysql>use mysql;

    mysql>update user set host = '%' where user = 'root';

    mysql>select host, user from user;

    如果本地能连接上,远程无法连接,查看root密码与本地密码是否一致

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  • 原文地址:https://www.cnblogs.com/dch0/p/11175443.html
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