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ctr: command not found

by Deepika

The ctr command is a utility in Linux that is used to control and monitor containerd, a daemon that manages containers on a host. Containerd is a lightweight container runtime that provides an API for managing the life cycle of containers and offers a variety of features such as image management, storage, and networking.

To list all the containers including running and stopped use the below command:

# ctr containers list

This will list all of the containers managed by containerd on the host.

If you encounter the below error while running the command ctr :

ctr: command not found

you may try installing the below package as per your choice of distribution:

Distribution Command
Debian apt-get install containerd
Ubuntu apt-get install containerd
Arch Linux pacman -S containerd
Fedora dnf install containerd
Raspbian apt-get install containerd

ctr Command Examples

1. List all containers (running and stopped):

# ctr containers list

2. List all images:

# ctr images list

3. Pull an image:

# ctr images pull image

4. Tag an image:

# ctr images tag source_image:source_tag target_image:target_tag

Filed Under: Linux

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