Magento 1 Data Upgrade Script: Set All Simple Products to Manage Stock

<?php
/* @var $installer Mage_Core_Model_Resource_Setup */
$installer = $this;
$installer->startSetup();

$collection = Mage::getModel('catalog/product')->getCollection()
    ->addAttributeToSelect('*')
    ->addAttributeToFilter('type_id', 'simple');

foreach ($collection as $product) {
    $stockItem = Mage::getModel('cataloginventory/stock_item')->loadByProduct($product->getId());
    $stockItem->setData('manage_stock', 1);
    $stockItem->setData('use_config_manage_stock', 1);
    $stockItem->save();
}

$installer->endSetup();

?>

SCP

You can do this with the scp command, which uses the ssh protocol to copy files across machines. It extends the syntax of cp to allow references to other systems:

scp username1@hostname1:/path/to/file username2@hostname2:/path/to/other/file

Copy something from this machine to some other machine:

scp /path/to/local/file username@hostname:/path/to/remote/file

Copy something from another machine to this machine:

scp username@hostname:/path/to/remote/file /path/to/local/file

Copy with a port number specified:

scp -P 1234 username@hostname:/path/to/remote/file /path/to/local/file