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虚拟机centos7安装 mariadb并修改默认密码设置远程访问,centos7mariadb

虚拟机centos7安装 mariadb并修改默认密码设置远程访问,centos7mariadb


centos7默认mysql是maridb

注意:mariadb与mysql root权限不同



本机连接虚拟机mariadb(本机连接虚拟机mysql,远程连接设置)

centos查看ip


这里为了防止失败,我首先检查mysql和mariadb没有安装

?

[root@localhost usr]# ps aux|grep mysql???? #检测mysql服务
root?????? 2180? 0.0? 0.0 112664?? 972 pts/0??? S+?? 17:46?? 0:00 grep --color=auto mysql
[root@localhost usr]# whereis mysql???? #是否有mysql残留文件
[root@localhost usr]#
mysql:[root@localhost usr]# whereis mariadb???????????? #查找是否有mariadb如果有就会显示文件夹先卸掉
mysql:[root@localhost usr]#
[root@localhost usr]# ps aux|grep mariadb?????????????? #是否有安装mariadb服务出现下面一行就是没有安装
root?????? 2201? 0.0? 0.0 112664?? 980 pts/0??? S+?? 17:48?? 0:00 grep --color=auto mariadb
[root@localhost usr]# yum install mariadb mariadb-server???????? #这是安装nariadb和mariadb服务
已加载插件:fastestmirror
Loading mirror speeds from cached hostfile
?* base: mirrors.tuna.tsinghua.edu.cn
?* extras: mirrors.yun-idc.com
?* updates: mirrors.sina.cn
正在解决依赖关系
--> 正在检查事务
---> 软件包 mariadb.x86_64.1.5.5.47-1.el7_2 将被 安装
--> 正在处理依赖关系 mariadb-libs(x86-64) = 1:5.5.47-1.el7_2,它被软件包 1:mariadb-5.5.47-1.el7_2.x86_64 需要
---> 软件包 mariadb-server.x86_64.1.5.5.47-1.el7_2 将被 安装
--> 正在检查事务
---> 软件包 mariadb-libs.x86_64.1.5.5.47-1.el7_2 将被 安装
--> 解决依赖关系完成

依赖关系解决

=======================================================================================================================================
?Package??????????????????????????? 架构?????????????????????? 版本????????????????????????????????? 源?????????????????????????? 大小
=======================================================================================================================================
正在安装:
?mariadb??????????????????????????? x86_64???????????????????? 1:5.5.47-1.el7_2????????????????????? updates???????????????????? 8.9 M
?mariadb-server???????????????????? x86_64???????????????????? 1:5.5.47-1.el7_2????????????????????? updates????????????????????? 11 M
为依赖而安装:
?mariadb-libs?????????????????????? x86_64???????????????????? 1:5.5.47-1.el7_2????????????????????? updates???????????????????? 755 k

事务概要
=======================================================================================================================================
安装? 2 软件包 (+1 依赖软件包)

总下载量:20 M
安装大小:108 M
Is this ok [y/d/N]: y
Downloading packages:
(1/3): mariadb-libs-5.5.47-1.el7_2.x86_64.rpm?????????????????????????????????????????????????????????????????? | 755 kB? 00:00:02??? ?
(2/3): mariadb-5.5.47-1.el7_2.x86_64.rpm??????????????????????????????????????????????????????????????????????? | 8.9 MB? 00:00:08??? ?
(3/3): mariadb-server-5.5.47-1.el7_2.x86_64.rpm???????????????????????????????????????????????????????????????? |? 11 MB? 00:00:11??? ?
---------------------------------------------------------------------------------------------------------------------------------------
总计?????????????????????????????????????????????????????????????????????????????????????????????????? 1.7 MB/s |? 20 MB? 00:00:11??? ?
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
? 正在安装??? : 1:mariadb-libs-5.5.47-1.el7_2.x86_64?????????????????????????????????????????????????????????????????????????????? 1/3
? 正在安装??? : 1:mariadb-5.5.47-1.el7_2.x86_64??????????????????????????????????????????????????????????????????????????????????? 2/3
? 正在安装??? : 1:mariadb-server-5.5.47-1.el7_2.x86_64???????????????????????????????????????????????????????????????????????????? 3/3
warning: /var/log/mariadb/mariadb.log created as /var/log/mariadb/mariadb.log.rpmnew
? 验证中????? : 1:mariadb-server-5.5.47-1.el7_2.x86_64???????????????????????????????????????????????????????????????????????????? 1/3
? 验证中????? : 1:mariadb-libs-5.5.47-1.el7_2.x86_64?????????????????????????????????????????????????????????????????????????????? 2/3
? 验证中????? : 1:mariadb-5.5.47-1.el7_2.x86_64??????????????????????????????????????????????????????????????????????????????????? 3/3

已安装:
? mariadb.x86_64 1:5.5.47-1.el7_2??????????????????????????????? mariadb-server.x86_64 1:5.5.47-1.el7_2????????????????????????????? ?

作为依赖被安装:
? mariadb-libs.x86_64 1:5.5.47-1.el7_2??????????????????????????????????????????????????????????????????????????????????????????????? ?

完毕!
[root@localhost usr]# systemctl start mariadb.server
Failed to start mariadb.server.service: Unit mariadb.server.service failed to load: No such file or directory.
[root@localhost usr]# systemctl start mariadb.service
[root@localhost usr]# ps aux|grep mariadb
mysql????? 2487? 0.6? 8.4 904952 84404 ???????? Sl?? 17:53?? 0:00 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/log/mariadb/mariadb.log --pid-file=/var/run/mariadb/mariadb.pid --socket=/var/lib/mysql/mysql.sock
root?????? 2521? 0.0? 0.0 112664?? 980 pts/0??? S+?? 17:54?? 0:00 grep --color=auto mariadb
[root@localhost usr]# mysql_secure_installation
/usr/bin/mysql_secure_installation:行379: find_mysql_client: 未找到命令

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
????? SERVERS IN PRODUCTION USE!? PLEASE READ EACH STEP CAREFULLY!

In order to log into MariaDB to secure it, we'll need the current
password for the root user.? If you've just installed MariaDB, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.

Enter current password for root (enter for none):
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.

Set root password? [Y/n] y???? #这里选择Y是否重新设置密码
New password:????????????????? #新密码
Re-enter new password:???????? #重复新密码
Password updated successfully!
Reloading privilege tables..
?... Success!


By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them.? This is intended only for testing, and to make the installation
go a bit smoother.? You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] n??????? #是否清楚其他用户的意思吧
?... skipping.

Normally, root should only be allowed to connect from 'localhost'.? This
ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] n???????? #是否禁止远程访问
?... skipping.

By default, MariaDB comes with a database named 'test' that anyone can
access.? This is also intended only for testing, and should be removed
before moving into a production environment.

Remove test database and access to it? [Y/n] y?? #是否删除测试数据
?- Dropping test database...
?... Success!
?- Removing privileges on test database...
?... Success!

Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.

Reload privilege tables now? [Y/n] y????????? #是否重置权限
?... Success!

Cleaning up...

All done!? If you've completed all of the above steps, your MariaDB
installation should now be secure.

Thanks for using MariaDB!
#这里就完成了
#下面重启一下mariadb服务和apache服务
[root@localhost usr]# systemctl restart mariadb.service
[root@localhost usr]# systemctl restart httpd.service
[root@localhost usr]# mysql -u root -p??? #登录看一下是否成功
Enter password:
Welcome to the MariaDB monitor.? Commands end with ; or \g.
Your MariaDB connection id is 3
Server version: 5.5.47-MariaDB MariaDB Server

Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]>

之前看了一篇文章觉得太扯了,本来之前是看别人写的,后来自己研究一下,发现完全是两回事


下面发现本地无法访问虚拟机可是ip都能ping通呀!我以为是防火墙,但是我发现我虚拟机防火墙是默认关闭的

那就只有一个就是权限问题

这里可以接着上面直接往下走

MariaDB [(none)]> use mysql   #进入mysql库
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
MariaDB [mysql]> select user,password,host from user;     #查询所有用户权限反正不管了
#我这里是之前没整干净所以这样的
+------+-------------------------------------------+-----------------------+
| user | password                                  | host                  |
+------+-------------------------------------------+-----------------------+
| root | *DB469070DB0AD0CA0B93040D166D7FC4713D6961 | localhost             |
| root | *DB469070DB0AD0CA0B93040D166D7FC4713D6961 | localhost.localdomain |
| root | *DB469070DB0AD0CA0B93040D166D7FC4713D6961 | 127.0.0.1             |
| root | *DB469070DB0AD0CA0B93040D166D7FC4713D6961 | ::1                   |
|      |                                           | localhost             |
|      |                                           | localhost.localdomain |
+------+-------------------------------------------+-----------------------+
6 rows in set (0.00 sec)
#‘%’意思给用户设置所有ip都可以访问
MariaDB [mysql]> grant all privileges on *.* to root@"%" identified by "1q2w3e4r";
Query OK, 0 rows affected (0.00 sec)MariaDB [mysql]> flush privileges; #提交Query OK, 0 rows affected (0.00 sec)MariaDB [mysql]> quit 退出Bye[root@localhost usr]# systemctl stop mariadb.service #停止服务[root@localhost usr]# ps aux|grep mariadb #看一下mariadb服务是否停止如下已停止root 2899 0.0 0.0 112664 980 pts/0 S+ 19:01 0:00 grep --color=auto mariadb[root@localhost usr]# systemctl start mariadb #启动赶快本地用navcat连接试一下
[root@localhost usr]# ip addr #不知道ip centos7用ip addr查看 建议最好用静态ip不然每次secure充连多麻烦
1: lo: mtu 65536 qdisc noqueue state UNKNOWN
??? link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
??? inet 127.0.0.1/8 scope host lo
?????? valid_lft forever preferred_lft forever
??? inet6 ::1/128 scope host
?????? valid_lft forever preferred_lft forever
2: eno16777736: mtu 1500 qdisc pfifo_fast state UP qlen 1000
??? link/ether 00:0c:29:4f:a3:ab brd ff:ff:ff:ff:ff:ff
??? inet 192.168.0.173/24 brd 192.168.0.255 scope global dynamic eno16777736
?????? valid_lft 7166sec preferred_lft 7166sec
??? inet6 fe80::20c:29ff:fe4f:a3ab/64 scope link
?????? valid_lft forever preferred_lft forever









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