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This is a guide for upgrading Magento 1.9 from the command line on FreeBSD 10.

Before starting make a full backup of the magento directory and database.

• Turn on maintenance mode:
  

  chmod -R 777 /usr/local/www/magento
  cd /usr/local/www/magento
  touch maintenance.flag
  

• Clear any session data and cache storage:
  

  rm -rf var/cache/* var/session/*
  

• Get the list of currently installed modules:
  

  chmod 550 ./mage
  sudo -u www ./mage mage-setup .
  sudo -u www ./mage config-set preferred_state stable
  sudo -u www ./mage list-installed
  

• Start the upgrade:
  

  sudo -u www ./mage list-upgrades
  sudo -u www ./mage upgrade-all
  

• Reindex magento and set the file permissions back to normal:
  

  sudo -u www php shell/indexer.php reindexall
  chmod -R 644 ./*
  find . -type d -exec chmod 755 {} \;
  

• Remove the maintenance flag:
  

  rm -f maintenance.flag
  

Resources¶

• https://firebearstudio.com/blog/upgrade-to-magento-community-1-9-by-ssh.html