今天我升级MYSQL到5.1的时候遇到的。写出来共享以下。

　　1、

　　[root@localhost mysql]# scripts/mysql_install_db

　　Neither host 'localhost.localdomain' nor 'localhost' could be looked up with

　　/resolveip

　　Please configure the 'hostname' command to return a correct

　　hostname.

　　If you want to solve this at a later stage, restart this script

　　with the --force option

　　这个主要是修改/etc/hosts文件

echo "127.0.0.1 localhost.localdomain localhost" >> /etc/hosts

　　然后再初始化数据，如果还是同样的错误，那就直接加--force开关。

　　我今天碰到的就是这个情况。

　　[root@localhost mysql]# scripts/mysql_install_db --force

　　Installing MySQL system tables...

　　OK

　　Filling help tables...

　　OK

　　To start mysqld at boot time you have to copy

　　support-files/mysql.server to the right place for your system

　　PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !

　　To do so, start the server, then issue the following commands:

　　/usr/local/mysql//bin/mysqladmin -u root password 'new-password'

　　/usr/local/mysql//bin/mysqladmin -u root -h localhost.localdomain password 'new-password'

　　See the manual for more instructions.

　　You can start the MySQL daemon with:

　　cd . ; /usr/local/mysql//bin/mysqld_safe &

　　You can test the MySQL daemon with mysql-test-run.pl