Auto emptying trash in Ubuntu
trash-cli trashes files recording the original path, deletion date, and
permissions. It uses the same trashcan used by KDE, GNOME, and XFCE, but you can invoke it from the command line (and
scripts). Install trash-cli with the below command:
sudo apt install trash-cliRun trash-empty 30 to remove all files from trash which are older than 30 days (You can change this number as you
like). To automate this, add a command to Startup Applications:
If you rarely restart your system, use cronjob. You can install cronjob with sudo apt install cron and edit/create
your own crontab file with corntab -e and add the below
0 0 * * * trash-empty 30Source: askubuntu