1.當前系統
[[email protected] ]# cat /etc/redhat-release
CentOS release 6.7 (Final)
2.下載mysql二進位制包
[[email protected] ]#cd /usr/local/src
[[email protected] src]# wget http://dev.mysql.com/get/Downloads/MySQL-5.5/mysql-5.5.32-linux2.6-x86_64.tar.gz
[[email protected] src]tar xf mysql-5.5.32-linux2.6-x86_64.tar.gz
3.將解壓的檔案移動到/usr/local/mysql-5.5.32做軟連結
[

[email protected] src]# mv mysql-5.5.32-linux2.6-x86_64 /usr/local/mysql-5.5.32

======/usr/local/mysql-5.5.32======就是安裝目錄

[[email protected] src]#ln -s /usr/local/mysql-5.5.32/ /usr/local/mysql

4.建立mysql使用者安裝資料庫
[[email protected] src]#useradd -s /sbin/nologin -M mysql
[[email protected]

src]#chown -R mysql.mysql /usr/local/mysql
[[email protected] src]#cd /usr/local/mysql-5.5.32
[[email protected] mysql-5.5.32]# ./scripts/mysql_install_db –basedir=/usr/local/mysql/mysql-5.5.32/ –user=mysql –datadir=/usr/local/mysql/data

5.將mysql提供的配置檔案複製到/etc/下
[[email protected] mysql-5.5.32]# cp ./support-files/my-small.cnf /etc/my.cnf
6.若mysql的安裝目錄不是/usr/local下的mysql，則需要修改啟動指令碼 ./support-files/mysql.server和./bin/mysqld_safe中mysql安裝目錄
[

[email protected] mysql-5.5.32]# sed -i ‘s#/usr/local/mysql#/usr/local/mysql-5.5.32#g’ ./support-files/mysql.server
[[email protected] mysql-5.5.32]# sed -i ‘s#/usr/local/mysql#/usr/local/mysql-5.5.32#g’ ./bin/mysqld_safe

7.修改啟動指令碼中的mysql目錄並複製到/etc/init.d
[[email protected] mysql-5.5.32]# cp ./support-files/mysql.server /etc/init.d/mysqld

8.將mysql安裝目錄下的bin加入到環境變數
[[email protected] mysql-5.5.32]# echo -e ‘PATH=/usr/local/mysql-5.5.32/bin:$PATH\nexport PATH’>>/etc/profile
[[email protected] mysql-5.5.32]# tail -2 /etc/profile
[[email protected] mysql-5.5.32]# source /etc/profile

9.啟動mysql
[[email protected] data]# /etc/init.d/mysqld start
Starting MySQL.. SUCCESS!
[[email protected] data]# /etc/init.d/mysqld status
SUCCESS! MySQL running (3063)

10.為mysql的root使用者設定密碼，登入資料庫，刪除不必要的庫和使用者
[[email protected] data]# mysqladmin -u root password
New password:
Confirm new password:
[[email protected] data]# mysql -u root -p
Enter password:
mysql> show databases;
+——————–+
| Database |
+——————–+
| information_schema |
| mysql |
| performance_schema |
| test |
+——————–+
4 rows in set (0.01 sec)

mysql> drop database test;

mysql> select user,host from mysql.user;
+——+———–+
| user | host |
+——+———–+
| root | 127.0.0.1 |
| root | ::1 |
| | localhost |
| root | localhost |
| | zexi |
| root | zexi |
+——+———–+

mysql> drop user ‘root’@’::1’;
mysql> drop user ”@’localhost’;
mysql> drop user ”@’zexi’;
mysql> drop user ‘root’@’zexi’;

mysql> show databases;
+——————–+
| Database |
+——————–+
| information_schema |
| mysql |
| performance_schema |
+——————–+
3 rows in set (0.00 sec)

mysql> select user,host from mysql.user;
+——+———–+
| user | host |
+——+———–+
| root | 127.0.0.1 |
| root | localhost |
+——+———–+
2 rows in set (0.00 sec)

中間遇到的問題及解決辦法見下一篇