centos 7怎么关联mysql

Posted 2023-04-25

参考技术A 1. 下载mysql的repo源
$
wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
2.
安装mysql-community-release-el7-5.noarch.rpm包

$
sudo rpm -ivh mysql-community-release-el7-5.noarch.rpm

3.
安装mysql

$
sudo yum install mysql-server

4.
重置密码

$
mysql -u root

登录时有可能报这样的错：ERROR
2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)，原因是/var/lib/mysql的访问权限问题。下面的命令把/var/lib/mysql的拥有者改为当前用户

$
sudo chown -R openscanner:openscanner /var/lib/mysql

$
service mysqld restart

6接下来登录重置密码：(注意分号)

$
mysql -u root

$ mysql > use mysql;
$
mysql > update user set password=password('123456') where user='root';

$
mysql > exit;
7.
开放3306端口

$
sudo vim /etc/sysconfig/iptables

添加以下内容：-A INPUT -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT

8.添加远程访问权限
mysql>
use mysql;
mysql>
desc user;
//为root添加远程连接的能力

mysql>
GRANT ALL PRIVILEGES ON *.* TO root@"%" IDENTIFIED BY "root";
//设置root用户密码

mysql>
update user set Password = password('123456') where User='root';
mysql>
select Host,User,Password from user where User='root';
mysql>
flush privileges;
mysql>
exit

//登陆
$
mysql -u root@123456 参考技术B MariaDB数据库管理系统是MySQL的一个分支，主要由开源社区在维护，采用GPL授权许可。开发这个分支的原因之一是：甲骨文公司收购了MySQL后，有将MySQL闭源的潜在风险，因此社区采用分支的方式来避开这个风险。
MariaDB的目的是完全兼容MySQL，包括API和命令行，使之能轻松成为MySQL的代替品。本回答被提问者采纳 参考技术C http://www.cnblogs.com/starof/p/4680083.html你参考下

centos7和centos6的区别

最近发的文章，有人咨询我，说为啥不用centos7，而用centos6，这个跟个人习惯和生产环境元素决定的。centos7和6变化的就很大的。我收集了一些区别，给大家看看。

注意：生产环境推荐centos6.个人学习尝鲜可以7.

(1)桌面系统

[centos6] GNOME 2.x

[centos7] GNOME 3.x（GNOME Shell）

(2)文件系统

[centos6] ext4

[centos7] xfs

(3)内核版本

[centos6] 2.6.x-x

[centos7] 3.10.x-x

(4)启动加载器

[centos6] GRUB Legacy (+efibootmgr)

[centos7] GRUB2

(5)防火墙

[centos6] iptables

[centos7] firewalld

(6)默认数据库

[centos6] MySQL

[centos7] MariaDB

(7)文件结构

[centos6] /bin, /sbin, /lib, and /lib64在/下

[centos7] /bin, /sbin, /lib, and /lib64移到/usr下

(8)主机名

[centos6] /etc/sysconfig/network

[centos7] /etc/hostname

(9)时间同步

[centos6]

$ ntp

$ ntpq -p

[centos7]

$ chrony

$ chronyc sources

(10)修改时间

[centos6]

$ vim /etc/sysconfig/clock

ZONE="Asia/Tokyo"

UTC=fales

$ sudo ln -s /usr/share/zoneinfo/Asia/Tokyo /etc/localtime

[centos7]

$ timedatectl set-timezone Asia/Tokyo

$ timedatectl status

(11)修改地区

[centos6]

$ vim /etc/sysconfig/i18n

LANG="ja_JP.utf8"

$ /etc/sysconfig/i18n

$ locale

[centos7]

$ localectl set-locale.utf8

$ localectl status

(12)服务相关

1）启动停止

[centos6]

$ service service_name start

$ service service_name stop

$ service sshd restart/status/reload

[centos7]

$ systemctl start service_name

$ systemctl stop service_name

$ systemctl restart/status/reload sshd

自启动

[centos6]

$ chkconfig service_name on/off

[centos7]

$ systemctl enable service_name

$ systemctl disable service_name

服务一览

[centos6]

$ chkconfig --list

[centos7]

$ systemctl list-unit-files

$ systemctl --type service

强制停止

[centos6]

$ kill -9 <PID>

[centos7]

$ systemctl kill --signal=9 sshd

(13)网络

1）网络信息

[centos6]

$ netstat

$ netstat -I

$ netstat -n

[centos7]

$ ip n

$ ip -s l

$ ss

2）IP地址MAC地址

[centos6]

$ ifconfig -a

[centos7]

$ ip address show

3）路由

[centos6]

$ route -n

$ route -A inet6 -n

[centos7]

$ ip route show

$ ip -6 route show

(14)重启关闭

1）关闭

[centos6]

$ shutdown -h now

[centos7]

$ poweroff

$ systemctl poweroff

2）重启

[centos6]

$ reboot

$ shutdown -r now

[centos7]

$ reboot

$ systemctl reboot

3）单用户模式

[centos6]

$ init S

[centos7]

$ systemctl rescue

4）启动模式

[centos6]

[GUI?CUI]

$ vim /etc/inittab

id:3:initdefault:

[CUI?GUI]

$ startx

[centos7]

[GUI?CUI]

$ systemctl isolate multi-user.target

[CUI?GUI]

$systemctl isolate graphical.target

默认

$ systemctl set-default graphical.target

$ systemctl set-default multi-user.target

当前

$ systemctl get-default

 

centos7和centos6的区别 - 今日头条(www.toutiao.com)
http://www.toutiao.com/i6404574010620772865/