ctr:tldr:c30a4

The command ctr containers list is used to display a list of all existing containers on a system.

Here is how the command works:

1. ctr: This is the command-line tool that interacts with the Container Runtime Interface (CRI) in the Linux kernel. It provides a way to manage containers at a lower level than traditional container management tools like Docker or Podman.

2. containers: This is the sub-command that specifies the action to be performed, which in this case is to list containers.

3. list: This is an argument to the containers sub-command that further specifies the operation to be performed, which is to display a list of containers.

When you run ctr containers list, the command communicates with the CRI to retrieve information about all the containers running on the system. It then outputs a list of containers, typically providing details such as their IDs, names, status, and other relevant information.