Mysql最新版安装

编译安装MySQL前预准备

首先检查系统中是否存在使用rpm安装的mysql或者mariadb，如果有需要先删除后再编译安装。
卸载完以后用 rpm -qa|grep mariadb 或者 rpm -qa|grep mysql 查看结果。

rpm -qa | grep mysql               #查找软件安装包mysql和mariadb
rpm -qa | grep mariadb
rpm -e xxx                         #卸载
rpm -e --nodeps xxx                #卸载不成功时使用此命令强制卸载

安装

（1）依赖以及软件

yum install -y libaio-*                        
mkdir -p /usr/local/mysql
cd /usr/local/src
wget http://zy-res.oss-cn-hangzhou.aliyuncs.com/mysql/mysql-5.7.17-linux-glibc2.5-x86_64.tar.gz 
tar -xzvf mysql-5.7.17-linux-glibc2.5-x86_64.tar.gz
mv mysql-5.7.17-linux-glibc2.5-x86_64/* /usr/local/mysql/

（2）建立mysql组和用户，并将mysql用户添加到mysql组

groupadd mysql
useradd -g mysql -s /sbin/nologin mysql

（3）初始化mysql数据库

/usr/local/mysql/bin/mysqld --initialize-insecure --datadir=/usr/local/mysql/data/ --user=mysql

（4）更改mysql安装目录的属主属组

chown -R mysql:mysql /usr/local/mysql

（5）设置开机自启

#第三句:添加执行权限
cd /usr/local/mysql/support-files/
cp mysql.server  /etc/init.d/mysqld
chmod +x /etc/init.d/mysqld             
vim /etc/rc.d/rc.local       

/etc/init.d/mysqld start            #写入rc.local 保存退出(:wq)

（6）设置环境变量

vi /root/.bash_profile
/usr/local/mysql/bin:/usr/local/mysql/lib  #add

source /root/.bash_profile

（7）启动MySQL数据库

/etc/init.d/mysqld start

（8）修改密码

#登录mysql后操作
set password for'root'@'localhost'=password('jtnyHistm0!j');

（9）开机自启

systemctl enable mysqld.service

开放远程连接

mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'jtnyHistm0!j(这是密码)' WITH GRANT OPTION;
 
 
//远程连接数据库的时候需要输入用户名和密码
用户名：root
密码:'jtnyHistm0!j(这是密码)'
指点ip:%代表所有Ip,此处也可以输入Ip来指定Ip
 
输入后使修改生效还需要下面的语句
mysql>FLUSH PRIVILEGES;

修改密码

mysqladmin -uroot -p password newpassword  

再输入旧密码 即可！

例如：
[root@iZwz9c4hgh9j5wntdcvzljZ etc]# mysqladmin -uroot -p password 'jtnyHistm0!j';
Enter password: 

---

可能会出现的问题

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)

find / -name mysql.sock
# /tmp/mysql.sock

vi my.ini

[client]
character-set-server = utf8
port    = 3306
socket  = /tmp/mysql.sock

systemctl restart mysqld.service

重启后出现的问题
Starting MySQL./usr/local/mysql/bin/mysqld_safe: line 586: /var/lib/mysql/mysqld_safe.pid: No such f
awk: (FILENAME=- FNR=1) warning: error writing standard output (Broken pipe)
2017-08-16T15:38:07.442738Z mysqld_safe Directory '/var/lib/mysql' for UNIX socket file don't exists The server quit without updating PID file (/var/lib/mysql/i[FAILED]k450a71dbd83kZ.pid).

vi /etc/my.cnf

将所有的 #/var/run/mysql
改成     #/usr/local/mysql

The server quit without updating PID file (/usr/local/mysql/iZ2ze9ikxk450a71dbd83kZ.pid)

#在[mysqld]中添加：
vi /etc/my.cnf

datadir = /usr/local/mysql/data
log-error = /usr/local/mysql/data/error.log
pid-file = /usr/local/mysql/data/mysql.pid
user = mysql
tmpdir = /tmp

连接数据库时Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

vi /etc/my.cnf
[mysqld]
socket=/usr/local/var/mysql.sock

[client]
socket=/usr/local/var/mysql.sock