Following are the steps to install Magento manually from Shell.
wget http://www.magentocommerce.com/downl…19870.4.tar.gz
wget http://www.magentocommerce.com/downl…0.19870.tar.gz
tar -zxvf magento-1.0.19870.4.tar.gz
tar -zxvf magento-sample-data-1.0.19870.tar.gz
mv magento-sample-data-1.0.19870/media/* magento/media/
mv magento-sample-ta-1.0.19870/magento_sample_data_for_1.0.19870.sql magento/data.sql
cd magento
chmod o+w var var/.htaccess app/etc
chmod -R o+w media
mysql -u DBUSER -pDBPASS DBNAME < data.sql
./pear mage-setup .
./pear install -f magento-core/Mage_All_Latest
rm -rf downloader/pearlib/cache/* downloader/pearlib/download/* .htaccess.sample data.sql index.php.sample ../magento-1.0.19870.4.tar.gz ../magento-sample-data-1.0.19870/ ../magento-sample-data-1.0.19870.tar.gz
find . -type d -exec chmod 777 {} \;
If after installation you are facing the “500 Internal Error Server” problem then check Apache logs and correct the ownership and permission for the folders as per logs.

