Mastodon CLI :
https://docs.joinmastodon.org/admin/tootctl/

Operativa:

sudo su
cd /var/www/mastodon/live/
sudo -u mastodon RAILS_ENV=production PATH=/opt/rbenv/versions/mastodon/bin bin/tootctl media remove
sudo -u mastodon RAILS_ENV=production PATH=/opt/rbenv/versions/mastodon/bin bin/tootctl media remove --prune-profiles
sudo -u mastodon RAILS_ENV=production PATH=/opt/rbenv/versions/mastodon/bin bin/tootctl preview_cards remove
sudo -u mastodon RAILS_ENV=production PATH=/opt/rbenv/versions/mastodon/bin bin/tootctl accounts cull
sudo -u mastodon RAILS_ENV=production PATH=/opt/rbenv/versions/mastodon/bin bin/tootctl media usage

Si no funciona tootctl:
apt install ruby-dev
bundle install