Magento 2 - Removed your var/generation and var/cache directory

command.sh

# ERROR: The directory "/chroot/home/username/domain.com/html/generated/code" cannot be deleted Warning!rmdir(/chroot/home/username/domain.com/html/generated/code): Directory not empty
# You need to remove it manually, if it is ubuntu then locate in your magento 2 root directory and run "rm -rf var/generation" and "rm -rf var/cache" command.
# Screenshot: https://www.dropbox.com/s/e786vkgpeuzko67/20181230_generated.jpg?dl=0
rm -rf var/generation
rm -rf var/cache

# and Then try to run below commands in sequence.
php bin/magento setup:di:compile
php bin/magento setup:upgrade
php bin/magento cache:clean
php bin/magento cache:flush

# delete subfolders under var directory
rm -rf var/di/ var/generation/ var/cache/ var/log/ var/page_cache/ var/session/ var/view_preprocessed/ pub/static/