Best matches40 results

docker Current supported releasesVerified for linux, macos using posix, bash, zsh syntax; consult compatibility notes for platform-specific differences.

Expected signals

TYPE TOTAL ACTIVE SIZE RECLAIMABLERepresentative successful output; values vary with the selected target and system state.

Known errors

docker: command not founddocker is missing or is not available on PATH.

Verifydocker system dfThe output matches the expected target and exits without an error.Rollback noteNot required: this command is read-only and does not change system state.

Command breakdown

01docker

Docker CLI

Connects to the Docker engine.

02system

Engine-wide operations

Selects commands that describe or manage Docker’s overall state.

03df

Disk usage

Summarizes space used by images, containers, volumes, and build cache.

Example input

docker system df

Example output

TYPE            TOTAL  ACTIVE  SIZE     RECLAIMABLE
Images          12     4       6.84GB   2.11GB (30%)
Containers      6      4       128MB    14MB (10%)
Local Volumes   9      3       18.2GB   4.7GB (25%)

Illustrative output — exact values vary by system and data.

Save to collection

Runbooks

Official sources

Docker CLI referenceofficial