docker ps

Basic Syntax

Key Options and Parameters

1. -a, --all: Show all containers (default shows just running).

   docker ps -a

2. -q, --quiet: Only display numeric IDs.

   docker ps -q

3. --filter: Filter output based on conditions provided.

   docker ps --filter "status=exited"

4. --format: Pretty-print containers using a Go template.

   docker ps --format "{{.ID}}: {{.Names}}"

5. -n, --last: Show n last created containers (includes all states).

   docker ps -n 5

6. -s, --size: Display total file sizes.

   docker ps -s

Examples

1. List Running Containers

   docker ps

   This command lists all currently running containers.

2. List All Containers

   docker ps -a

   This command lists all containers, including those that are stopped.

3. List Only Container IDs

   docker ps -q

   This command lists only the IDs of all running containers.

4. Filter Containers by Status

   docker ps --filter "status=exited"

   This command lists only the containers that have exited.

5. Format Output

   docker ps --format "{{.ID}}: {{.Names}}"

   This command formats the output to show only the container ID and name.

6. Show Last 5 Created Containers

   docker ps -n 5

   This command lists the last 5 created containers, including all states.

7. Display Total File Sizes

   docker ps -s

   This command lists running containers and displays their total file sizes.

Conclusion

The docker ps command is essential for managing and monitoring Docker containers. Understanding its options and parameters allows you to effectively list and filter containers based on your needs.