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sudo usermod -a -G sudo username
http://fideloper.com/install-zend-opcache Also read https://www.digitalocean.com/community/questions/how-to-install-alternative-php-cache-apc-on-ubuntu-14-04
printf '\033[?7l' ls -l /a/folder/that/contains/files/with/long/names printf '\033[?7h'
