Reindex All:
  php shell/indexer.php reindexall

Clear Caches:
  rm -rf ./downloader/pearlib/cache/* ./downloader/pearlib/download/*
	rm -rf  ./var/cache/* ./var/session/* ./var/report/* ./var/log/*
	rm -rf  ./media/tmp/* ./app/code/core/Zend/Cache/* ./var/tmp/*

Fix Permissions:
  find . -type d -exec chmod 755 {} \;
  find . -type f -exec chmod 644 {} \;
	chmod o+w var var/.htaccess app/etc
	chmod 550 ./lib/pear
	chmod -R o+w media
	chmod 550 ./mage

Upgrade or Install:
  wget http://www.magentocommerce.com/downloads/assets/1.9.0.1/magento-1.9.0.1.tar.gz
	tar -zxvf magento-1.9.0.1.tar.gz
	cp -rf magento/* magento/.htaccess .
	rm -rf magento
	rm magento-1.9.0.1.tar.gz
	rm -rf ./downloader/pearlib/cache/* ./downloader/pearlib/download/* ./var/cache/* ./var/session/* ./var/report/* ./media/tmp/* ./app/code/core/Zend/Cache/*
	find . -type d -exec chmod 755 {} \;
	find . -type f -exec chmod 644 {} \;
	chmod o+w var var/.htaccess app/etc
	chmod 550 ./lib/pear
	chmod -R o+w media
	chmod 550 ./mage
	rm -rf ./downloader/pearlib/cache/* ./downloader/pearlib/download/*
	rm -rf  ./var/cache/* ./var/session/* ./var/report/* ./var/log/*
	rm -rf  ./media/tmp/* ./app/code/core/Zend/Cache/* ./var/tmp/*
	
	Previous Version:
	wget http://www.magentocommerce.com/downloads/assets/1.8.1.0/magento-1.8.1.0.tar.gz
	tar -zxvf magento-1.8.1.0.tar.gz
	cp -rf magento/* magento/.htaccess .
	rm -rf magento
	rm magento-1.8.1.0.tar.gz