centos_mysql
centos_mysql
MySQL-devel-5.5.45-1.linux2.6.x86_64.rpm
MySQL-client-5.5.45-1.linux2.6.x86_64.rpm
MySQL-server-5.5.45-1.linux2.6.x86_64.rpm
http://cdn.mysql.com/Downloads/MySQL-5.5/MySQL-server-5.5.45-1.linux2.6.x86_64.rpm
http://cdn.mysql.com/Downloads/MySQL-5.5/MySQL-client-5.5.45-1.linux2.6.x86_64.rpm
http://cdn.mysql.com/Downloads/MySQL-5.5/MySQL-devel-5.5.45-1.linux2.6.x86_64.rpm
/usr/local/mysql 安装文件
rpm -ivh MySQL-client-5.5.45-1.linux2.6.x86_64.rpm MySQL-server-5.5.45-1.linux2.6.x86_64.rpm MySQL-devel-5.5.45-1.linux2.6.x86_64.rpm
which mysql
mysql --version
https://ask.fedoraproject.org/en/question/43459/how-to-start-mysql-mysql-isnt-starting/
yum install mariadb mariadb-server
systemctl start mariadb.service
systemctl enable mariadb.service
/usr/bin/mysql_secure_installation
/etc/init.d/mysql status
/usr/bin/mysql /usr/lib64/mysql /usr/include/mysql /usr/share/mysql /usr/share/man/man1/mysql.1.gz
mysql -u root -p
show databases;
create database mytest;
use mytest;
create table students(
-> id int unsigned not null auto_increment primary key,
-> name char(8) not null,
-> sex char(4) not null);
show tables;
insert into students values(1,"ysh","femeal");
mysql怎么查看端口号
show variables ;
远程访问
mysql不允许远程用户访问主机服务器 1130
安装完之后成 使用 mysql admin连接报错
ERROR 1130: Host ***.***.***.*** is not allowed to connect to this MySQL server
以下百度查到的,试过可以
说明所连接的用户帐号没有远程连接的权限,只能在本机(localhost)登录。
需更改 mysql 数据库里的 user表里的 host项
把localhost改称%
具体步骤:登陆到mysql
首先 use mysql;
按照别人提供的方式update的时候,出现错误。
mysql> update user set host='%' where user = 'root';
ERROR 1062 (23000): Duplicate entry '%-root' for key 'PRIMARY'
然后查看了下数据库的host信息如下:
mysql> select host from user where user = 'root';
+-----------------------+
| host |
+-----------------------+
| % |
| 127.0.0.1 |
| localhost.localdomain |
+-----------------------+
3 rows in set (0.00 sec)
host已经有了%这个值,所以直接运行命令:
mysql>flush privileges;
再用mysql administrator连接...成功!!!
删除这两个服务(去掉后缀)
rpm –e MySQL-client-5.6.19-1.linux_glibc2.5.x86_64
rpm -e MySQL-server-5.6.19-1.linux_glibc2.5.x86_64
查看残留的目录:
whereis mysql
然后删除mysql目录:
rm –rf /usr/lib64/mysql
删除相关文件:
rm –rf /usr/my.cnf
rm -rf /root/.mysql_sercret
CentOS 7的yum源中貌似没有正常安装mysql时的mysql-sever文件,需要去官网上下载
# wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
# rpm -ivh mysql-community-release-el7-5.noarch.rpm
# yum install mysql-community-server
成功安装之后重启mysql服务
# service mysqld restart
初次安装mysql是root账户是没有密码的
设置密码的方法
# mysql -uroot
mysql> set password for ‘root’@‘localhost’ = password('mypasswd');
mysql> exit
mysql中文乱码
登录进mysql看看是个什么情况。
mysql -u root -p
5.看下mysql的编码,发现不全是utf8,有Latin的,这是中文乱码的根源。
show variables like 'character%';
6.关闭mysql服务,准备开始修改my.cnf文件
service mysqld stop
vi /etc/my.cnf
7.看了网络上很多版本的my.cnf的修改方式,我索性就全给改成了utf8,我的my.cnf文件是这样的。
[mysqld]
character_set_server=utf8 #这个是我添加的
init_connect='SET NAMES utf8'
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
symbolic-links=0
[mysqld_safe]
default-character-set = utf8 #这个是我添加的
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[client]
default-character-set = utf8 #这个是我添加的
[mysql.server]
default-character-set = utf8 #这个是我添加的
[mysql]
default-character-set = utf8 #这个是我添加的
8.修改了my.cnf文件之后一定要重启mysql服务,这是必须的。
service mysqld restart
9.再进去mysql查看编码会发都变成了utf8,除了character_set_filesystem 是binary 。这个不用我解释是为什么了。
Mac安装MySQL初始密码设置 http://blog.csdn.net/arlenliugj/article/details/50700249
step1:
苹果->系统偏好设置->最下边点mysql 在弹出页面中 关闭mysql服务(点击stop mysql server)
step2:
进入终端输入:cd /usr/local/mysql/bin/
回车后 登录管理员权限 sudo su
回车后输入以下命令来禁止mysql验证功能 ./mysqld_safe --skip-grant-tables &
回车后mysql会自动重启(偏好设置中mysql的状态会变成running)
step3.
输入命令 ./mysql
回车后,输入命令 FLUSH PRIVILEGES;
回车后,输入命令 SET PASSWORD FOR 'root'@'localhost' = PASSWORD('你的新密码');
至此,密码修改完成,可以成功登陆。
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.01 sec)
mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables;
+---------------------------+
| Tables_in_mysql |
+---------------------------+
| columns_priv |
| db |
| engine_cost |
| event |
| func |
| general_log |
| gtid_executed |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| innodb_index_stats |
| innodb_table_stats |
| ndb_binlog_index |
| plugin |
| proc |
| procs_priv |
| proxies_priv |
| server_cost |
| servers |
| slave_master_info |
| slave_relay_log_info |
| slave_worker_info |
| slow_log |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+---------------------------+
31 rows in set (0.00 sec)