TYPE
Four types of disk used by docker are listed:RECLAIMABLE
Is recyclable size./var/lib/docker/containers/ID
Directory. If the container uses the default log mode, all its logs will be saved to this directory in JSON form./var/lib/docker/overlay2
The directory contains the read-write layer of the container. If the container uses its own file system to save data, it will be written to this directory.df
After the command, you will see:docker container prune
The command is to delete stopped containers. If you want to delete all containers (including stopped and running ones), you can use the following two commands:prune
This subcommand helps us reclaim space.prune
This subcommand can clear the useless space with one click: