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[Ranman]

# Move to /usr/local
cd /usr/local

# Get the following source:
http://dev.mysql.com/downloads/mysql/


# Decompress the sources:
tar -xvzf mysql-<version>.tar.gz

cd mysql-<version>
./configure
make
make install
scripts/mysql_install_db

adduser mysql
# In the file /etc/login.access add this line:
-:mysql:ALL
# So the user mysql never actualy logs in

# For Slackware:
chown -R mysql.users /usr/local/var
# For Redhat:
chown -R mysql.mysql /usr/local/var

mysqld_safe --user=mysql &

# Hit <Enter>
mysqladmin -u root password 'yourpasswordhere'

[Patton]

Official Documation: Installing MySQL from Source