centos7 yum安装mysql5.x及启动失败解决
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Step1: 检测系统是否自带安装MySQL
#yum list installed | grep mysql
Step2: 删除系统自带的mysql及其依赖 命令:
# yum -y remove mysql-libs.x86_64
Step3: 给CentOS添加rpm源,并且选择较新的源 命令:
# wget -i http://dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm# yum -y install mysql57-community-release-el7-7.noarch.rpm# yum repolist all | grep mysql# yum-config-manager --disable mysql55-community# yum-config-manager --disable mysql56-community# yum-config-manager --enable mysql57-community-dmr# yum repolist enabled | grep mysql
Step4:安装mysql 服务器 命令:
# yum install mysql-community-server
Step5: 启动mysql 命令:
#service mysqld start
Step6: 查看mysql是否自启动,并且设置开启自启动 命令:
# chkconfig --list | grep mysqld# chkconfig mysqld on
Step7: mysql安全设置 命令:
# mysql_secure_installation
centos yum 安装mysql5.7 以及 默认root密码查看
grep "password" /var/log/mysqld.log mysqlset global validate_password_policy=0; set global validate_password_length=4; set password for 'xxxx'@'localhost'=password('xxxx');flush privileges;
mysql centos 远程登录
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'xxx' WITH GRANT OPTION;
mysql centos 密码 忘记 root
vi /etc/my.cnf在[mysqld]的段中加上一句:skip-grant-tables例如:[mysqld]datadir=/var/lib/mysqlsocket=/var/lib/mysql/mysql.sockskip-grant-tables保存并且退出vi。service mysqld restartupdate user set authentication_string=password('xxx') where user='root';alter user 'root'@'localhost' identified by 'xxx';
启动失败 mysql 5.6.25启动不起来
[root@root ~]# /etc/init.d/mysqld startStarting mysqld (via systemctl): Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.mkdir -p /var/run/mysqld/chown mysql.mysql /var/run/mysqld/
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