Installing and testing MySQL Server 5.0.45

Instructions for installations are available in Install MySQL on a RH machine .
Basic commands include:

shell> groupadd mysql
shell> useradd -g mysql mysql
shell> cd /usr/local
shell> gunzip < /path/to/mysql-VERSION-OS.tar.gz tar xvf -
shell> ln -s full-path-to-mysql-VERSION-OS mysql
shell> cd mysql
shell> chown -R mysql .
shell> chgrp -R mysql .
shell> scripts/mysql_install_db --user=mysql
shell> chown -R root .
shell> chown -R mysql data
shell> bin/mysqld_safe --user=mysql &

If mysqld is currently running, you can find out what path settings it is using by executing this command:
shell> mysqladmin variables
Or:
shell> mysqladmin -h host_name variables

Another good instruction on installing MySQL Server is available here.

Problems when installing pear

I got the following error when I first tried to install PEAR components:
Cannot find module (IP-MIB): At line 0 in (none)
Cannot find module (IF-MIB): At line 0 in (none)
Cannot find module (TCP-MIB): At line 0 in (none)
Cannot find module (UDP-MIB): At line 0 in (none)
.......
I googled this error, every expert says there's a configuration error. Yes, there must be a configuration issue. That is so obvious! But, WHERE? Where does this fucking configuration issue reside?
I checked the php.ini file, but I didn't get many clues at first. After a while, I recalled that the php.ini file is created by renaming the default "php.ini-dist" file. There are some unnecessary entries in the end of the file which led to the above error. After deleting all of them, everything works fine.
However, another problem appeared, which was like:
PHP Warning: Cannot use a scalar value as an array in phar://go-pear.phar/PEAR/Command.php on line 268
......
This was also a strange error. But still, not much information in the documentation related to this! The solution was:
(1) go to the site: http://go-pear.org/ , read the instructions;
(2) you'll find the following command for windows:
C:\php5>php -r "readfile('http://pear.php.net/go-pear');">go-pear
C:\php5>php go-pear
The it's all solved! It took me almost one hour due to lack of documentation.