关于mysql升级到5.5报错问题

升级命令wget http://down.wdlinux.cn/in/mysql_up55.sh
sh mysql_up55.sh


安装日志错误部分
Shutting down MySQL. SUCCESS!
scripts/mysql_install_db.sh: line 325: @HOSTNAME@: command not found
WARNING: The host '' could not be looked up with resolveip.
This probably means that your libc libraries are not 100 % compatible
with this binary MySQL version. The MySQL daemon, mysqld, should work
normally with the exception that host name resolving will not work.
This means that you should use IP addresses instead of hostnames
when specifying MySQL privileges !
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:

/www/wdlinux/mysql/bin/mysqladmin -u root password 'new-password'
/www/wdlinux/mysql/bin/mysqladmin -u root -h  password 'new-password'

Alternatively you can run:
/www/wdlinux/mysql/bin/mysql_secure_installation

which will also give you the option of removing the test
databases and anonymous user created by default.  This is
strongly recommended for production servers.

See the manual for more instructions.

You can start the MySQL daemon with:
cd /www/wdlinux/mysql ; /www/wdlinux/mysql/bin/mysqld_safe &

You can test the MySQL daemon with mysql-test-run.pl
cd /www/wdlinux/mysql/mysql-test ; perlmysql-test-run.pl

Please report any problems with the /www/wdlinux/mysql/scripts/mysqlbug script!

ERROR! MySQL server PID file could not be found!
Starting MySQL. ERROR! The server quit without updating PID file (/www/wdlinux/mysql-5.5.27/data/localhost.localdomain.pid).


Running..., Please Wait...
err
mysql update is OK

错误情况
http://www.wdlinux.cn/bbs/viewthread.php?tid=5137
安装完后提示


重启mysql时提示，后台登陆不了。


解决办法



vi /www/wdlinux/init.d/mysqld
修改46 47行的目录为安装目录与数据库目录