centos7 卸载 wine 如何卸载centos7

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mob64ca13ff9303 2024-03-30 17:45:07

文章标签 centos7 卸载 wine centos7 mysql MySQL Server 文章分类 架构后端开发

一、安装mysql源

1、创建mysql目录 /home/mysql

2、进入mysql目录
cd /home/mysql

3、下载mysql源安装包（可在http://dev.mysql.com/downloads/repo/yum/ 获取源安装包地址）

wget http://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm
[root@172 mysql]# wget http://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

Length: 25680 (25K) [application/x-redhat-package-manager]
Saving to: ‘mysql57-community-release-el7-11.noarch.rpm’

100%[================  ======>] 25,680      --.-K/s   in 0.1s    

2017-12-13 09:49:40 (250 KB/s) - ‘mysql57-community-release-el7-11.noarch.rpm’ saved [25680/25680]

4、安装mysql源

[root@172 mysql]# yum localinstall mysql57-community-release-el7-11.noarch.rpm 
Loaded plugins: fastestmirror, langpacks
.......

Total size: 31 k
Installed size: 31 k
Is this ok [y/d/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : mysql57-community-release-el7-11.noarch                                                                      1/1 
  Verifying  : mysql57-community-release-el7-11.noarch                                                                      1/1 

Installed:
  mysql57-community-release.noarch 0:el7-11                                                                                     

Complete!

5、检查mysql源安装情况

[root@172 mysql]# yum repolist enabled | grep "mysql.*-community.*"
mysql-connectors-community/x86_64       MySQL Connectors Community           42
mysql-tools-community/x86_64            MySQL Tools Community                55
mysql57-community/x86_64                MySQL 5.7 Community Server          227

执行命令后返回上述结果表示mysql源安装成功。

二、安装mysql

1、安装mysql

[root@172 mysql]# yum install mysql-community-server
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: centos.ustc.edu.cn
 * extras: ftp.sjtu.edu.cn
 ........

Installed:
  mysql-community-server.x86_64 0:5.7.20-1.el7                                                                                 

Dependency Installed:
  mysql-community-client.x86_64 0:5.7.20-1.el7                   mysql-community-common.x86_64 0:5.7.20-1.el7                  
  mysql-community-libs.x86_64 0:5.7.20-1.el7                    

Complete!

2、启动msyql
systemctl start mysqld

3、查看启动状态

[root@172 mysql]# systemctl status mysqld
● mysqld.service - MySQL Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: active (running) since Thu 2017-12-14 06:02:51 EST; 2min 13s ago
     Docs: man:mysqld(8)
           http://dev.mysql.com/doc/refman/en/using-systemd.html
  Process: 9605 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=0/SUCCESS)
  Process: 9524 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
 Main PID: 9607 (mysqld)
   CGroup: /system.slice/mysqld.service
           └─9607 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid

Dec 14 06:02:33 *.*.*.* systemd[1]: Starting MySQL Server...
Dec 14 06:02:51 *.*.*.* systemd[1]: Started MySQL Server.

4、设置开机启动
systemctl enable mysqld
systemctl daemon-reload

三、配置mysql

1、修改密码策略
mysql5.7默认带有密码查检策略，密码默认策略要求：大小写字母、数字和特殊符号，并且长度不能少于8位。否则会提示ERROR 1819 (HY000): Your password does not satisfy the current policy requirements错误。

mysql的密码策略相关信息，可以在登录mysql后，通过命令show variables like ‘%password%’查看。
validate_password_policy：密码策略，默认为MEDIUM策略
validate_password_dictionary_file：密码策略文件，策略为STRONG才需要
validate_password_length：密码最少长度
validate_password_mixed_case_count：大小写字符长度，至少1个
validate_password_number_count ：数字至少1个
validate_password_special_char_count：特殊字符至少1个

mysql共有以下几种密码策略

策略	检查规则
0 or LOW	Length
1 or MEDIUM	Length; numeric, lowercase/uppercase, and special characters
2 or STRONG	Length; numeric, lowercase/uppercase, and special characters; dictionary file

详情可参考：http://dev.mysql.com/doc/refman/5.7/en/validate-password-options-variables.html#sysvar_validate_password_policy

可通过修改/etc/my.cnf文件来达到修改密码策略目的，具体方式修改方式如下：

# 选择0（LOW），1（MEDIUM），2（STRONG）其中一种，选择2需要提供密码字典文件
validate_password_policy=0

# 如果不需要密码策略，添加my.cnf文件中添加如下配置禁用即可：
validate_password = off

# 重新启动mysql服务使配置生效：
systemctl restart mysqld

2、修改root密码
mysql安装后，系统会自动初始化一个密码，通过如下命令查看：

[root@172 mysql]# grep 'temporary password' /var/log/mysqld.log
2017-12-14T11:02:37.459592Z 1 [Note] A temporary password is generated for root@localhost: ju/,8f1;O!J8
# 密码为localhost:后的字符，本例为：ju/,8f1;O!J8

使用root和默认密码登录mysql
mysql -uroot -p，然后输入默认密码登录。
修改root密码，可通过以下两种方式：

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'your password'; 
mysql> set password for 'root'@'localhost'=password('your password');

3、配置默认编码
通过修改/etc/my.cnf文件，在[mysqld]下添加编码配置，如下：
[mysqld]
character_set_server=utf8
init_connect=’SET NAMES utf8’
重启服务生效（systemctl restart mysqld）

重启后查看数据库默认编码格式如下：
mysql> show variables like ‘%character%’;

Variable_name	Value
character_set_client	utf8
character_set_connection	utf8
character_set_database	utf8
character_set_filesystem	binary
character_set_results	utf8
character_set_server	utf8
character_set_system	utf8
character_sets_dir	/usr/share/mysql/charsets/

4、设置远程访问
默认只允许root帐户在本地登录，如果要在其它机器上连接mysql，必须修改root允许远程连接，官方建议添加一个允许远程连接的帐户，尽量不使用root账号远程连接。添加用户账号命令如下：

mysql> CREATE USER 'test' IDENTIFIED BY 'test';
mysql> GRANT ALL PRIVILEGES ON *.* TO 'test'@'%' IDENTIFIED BY 'test' WITH GRANT OPTION;
mysql> GRANT ALL PRIVILEGES ON *.* TO 'test'@'localhost' IDENTIFIED BY 'test' WITH GRANT OPTION;

四、卸载mysql

1、关闭mysql服务systemctl stop mysqld

2、查看已经安装的mysql组件

[root@172 ~]# rpm -qa | grep -i mysql
mysql-community-libs-compat-5.7.20-1.el7.x86_64
mysql-community-libs-5.7.20-1.el7.x86_64
mysql57-community-release-el7-11.noarch
mysql-community-client-5.7.20-1.el7.x86_64
mysql-community-server-5.7.20-1.el7.x86_64
mysql-community-common-5.7.20-1.el7.x86_64

3、卸载已经安装过的组件

yum -y remove mysql-community-client-5.7.20-1.el7.x86_64
yum -y remove mysql-community-common-5.7.20-1.el7.x86_64

# 卸载comm时，libs-compat会跟随卸载，此步可不操作
yum -y remove mysql-community-libs-compat-5.7.20-1.el7.x86_64
yum -y remove mysql57-community-release-el7-11.noarch

# 卸载client时，server会跟随卸载，此步可不操作
yum -y remove mysql-community-server-5.7.20-1.el7.x86_64

4、删除mysql目录

# whereis查找
[root@172 ~]# whereis mysql
mysql: /usr/share/mysql

# 删除残留
rm -rf /usr/share/mysql

# find查找
[root@172 ~]# find / -name mysql
/home/mysql
/etc/selinux/targeted/active/modules/100/mysql
/etc/selinux/targeted/tmp/modules/100/mysql
/var/lib/mysql
/var/lib/mysql/mysql

# 删除残留
rm -rf /home/mysql
rm -rf /etc/selinux/targeted/active/modules/100/mysql
rm -rf /etc/selinux/targeted/tmp/modules/100/mysql
rm -rf /var/lib/mysql
rm -rf /var/lib/mysql/mysql

# 删除配置文件
rm –rf /usr/my.cnf
rm -rf /root/.mysql_sercret

5、确认卸载
rpm -qa | grep -i mysql

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