SHELL

docker clear container logs

sudo sh -c "truncate -s 0 /var/lib/docker/containers/*/*-json.log"

docker clean logs

truncate -s 0 /var/lib/docker/containers/*/*-json.log;

docker clear logs

choose your style
 >  /var/lib/docker/containers/*/*-json.log
 cat /dev/null > /var/lib/docker/containers/*/*-json.log
 echo "" > /var/lib/docker/containers/*/*-json.log