Ubuntu Installation :: Warning - Can't Create Test File /var/lib/mysql/mosty.lower-test

I am trying to install mysql 5.1.44..so i downloaded the binary package, i extracted it and then followed the instructions that were in the manual but i keep getting this error when running this command

Code:

scripts/mysql_install_db --basedir=/home/mosty/mysql

the error is

Code:

Installing MySQL system tables...
100315 20:07:27 [Warning] Can't create test file /var/lib/mysql/mosty.lower-test
100315 20:07:27 [Warning] Can't create test file /var/lib/mysql/mosty.lower-test

[code]....

You can try to start the mysqld daemon with:

shell> /home/mosty/mysql/bin/mysqld --skip-grant &

and use the command line tool /home/mosty/mysql/bin/mysql to connect to the mysql database and look at the grant tables:

shell> /home/mosty/mysql/bin/mysql -u root mysql
mysql> show tables