問題1：

[[email protected]_ts_tian bin]# mysqladmin -uroot password 'kaka123'
mysqladmin: connect to server at 'localhost' failed
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)'
[[email protected]_ts_tian bin]# mysql
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
[

問題1.1：

發現mysql資料庫下user表中，Host和User為兩個主鍵列。

mysql> update user set host='%' where user='root';
ERROR 1062 (23000): Duplicate entry '%-root' for key 'PRIMARY'

解決1 （7：忘記密碼）：

[[email protected]_ts_tian bin]# service mysqld stop 
Shutting down MySQL.. SUCCESS! 
[[email protected]_ts_tian bin]# mysqld_safe --user=root --skip-grant-tables --skip-networking &
[1] 30273
[[email protected]_ts_tian bin]# 151013 15:40:40 mysqld_safe Logging to '/var/lib/mysql/Tony_ts_tian.err'.
151013 15:40:40 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
 

注：--skip-grant-tables 啟動mysql時不啟動grant-tables，授權表

       --skip-networking關閉MySQL的TCP/IP連線方式，跳過網路

注：不要關閉上個終端，再次開啟一個終端。
執行以下指令:

[email protected]_ts_tian init.d]# mysql -u root
mysql> use mysql
mysql> UPDATE user SET Password=PASSWORD('kaka321') where USER='root';
mysql> flush privileges;
mysql> quit
[[email protected]_ts_tian bin]# service mysqld start
[[email protected]_ts_tian bin]# service mysqld restart
[[email protected]_ts_tian bin]# mysql -u root -p
Enter password:
………………ok.

或者：

UPDATE `user` SET Host='%' WHERE Host='127.0.0.1' AND User='root'

注：也可使用：/etc/mysql/debian.cnf檔案中[client]下配置的密碼。

問題2：

mysql> use mysql
ERROR 1820 (HY000): You must SET PASSWORD before executing this statement

解決2：

mysql> SET PASSWORD = PASSWORD('kaka321');
Query OK, 0 rows affected (0.00 sec)

修改後繼續使用。
問題3：

mysql> INSERT INTO mysql.user(Host,User,Password) VALUES("10.155.123.55","kaka",PASSWORD("kaka123"));
ERROR 1364 (HY000): Field 'ssl_cipher' doesn't have a default value
mysql> INSERT INTO mysql.user(Host,User,Password,ssl_cipher) VALUES("10.155.123.55","kaka",PASSWORD("kaka123"),"");
ERROR 1364 (HY000): Field 'x509_issuer' doesn't have a default value
mysql> INSERT INTO mysql.user(Host,User,Password,ssl_cipher,x509_issuer) VALUES("10.155.123.55","kaka",PASSWORD("kaka123"),"","");
ERROR 1364 (HY000): Field 'x509_subject' doesn't have a default value
mysql> INSERT INTO mysql.user(Host,User,Password,ssl_cipher,x509_issuer) VALUES("10.155.123.55","kaka",PASSWORD("kaka123"),"","");
ERROR 1364 (HY000): Field 'x509_subject' doesn't have a default value

解決3：

mysql> INSERT INTO mysql.user(Host,User,Password,ssl_cipher,x509_issuer,x509_subject) VALUES("10.155.123.55","kaka",PASSWORD("kaka123"),"","","");
Query OK, 1 row affected (0.03 sec)

問題4：

 ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'weloveshare'

解決4：

[[email protected]_ts_tian bin]# mysql -u root -p;
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 5.1.73 Source distribution

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

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

mysql> 密碼正確，就可以登入了.

問題5：

C compiler on this system is: cc 
Cannot find appropriate C++ compiler on this system.
configure: error: no acceptable C compiler found in $PATH

解決5：

apt-get install gcc build-essential

configure: error: no acceptable m4 could be found in $PATH.

解決6：

ftp://ftp.gnu.org/gnu/m4/
apt-get install m4

make[1]: *** [sql/CMakeFiles/sql.dir/all] Error 2
ubuntu version: Ubuntu 14.04 LTS

解決7：

1：要麼磁碟儲存空間不足，一版5.6的大概30G左右！

2：安裝：

apt-get install bison

問題8：

make && make install
The program 'make' is currently not installed. You can install it by typing:

解決8：

apt-get install make

mysql啟動失敗！

[email protected]:/usr/local/mysql/support-files# ./mysql.server start
Starting MySQL
... * The server quit without updating PID file (/data/mysql.pid).

解決9：

1：my.cnf 配置檔案配置錯誤！參考！

2：安裝完後，可能重啟下系統，可選建議！

3：mysql原始碼編譯問題！