memory

instalar edac-utils:
aptitude install edac-utils

verificar:
edac-util -v

ou ainda:
dmesg | grep -i edac

https://www.hardwarecanucks.com/forum/hardware-canucks-reviews/75030-ec…

https://superuser.com/questions/893560/how-do-i-tell-if-my-memory-is-ec…

http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/75030-ecc…

https://www.asus.com/support/FAQ/1045186

https://hardforum.com/threads/ryzen-motherboard-that-supports-ddr4-ecc…

o erro - ALERT - script tried to increase memory_limit to 100663296 bytes which is above the allowed value (attacker 'REMOTE_ADDR not set', file '/var/www/adsl.esb3-fernaomagalhaes.edu.pt/htdocs/novomoodle/lib/setuplib.php', line 80)

a correcção -
nano /etc/php5/conf.d/suhosin.ini
inserir no fim "suhosin.memory_limit=256M" 256M será substituído pelo limite definido no php.ini
https://moodle.org/mod/forum/discuss.php?d=99199