Check ya logs bb

/var/logs

https://www.loggly.com/ultimate-guide/linux-logging-basics/

https://askubuntu.com/questions/171678/can-i-delete-var-log-files-due-to-low-root-space

https://superuser.com/questions/90008/how-to-clear-the-contents-of-a-file-from-the-command-line/634217#634217

https://askubuntu.com/questions/436051/i-cannot-clear-syslog-but-i-can-remove-it

https://serverfault.com/questions/285843/is-there-a-proper-way-to-clear-logs