namespaces(7)

List namespaces

# List all namespaces.
lsns
# List all namespaces of specific type.
lsns -t net
lsns -t pid

Enter namespaces

 # Enter all namespaces of a pid.
 nsenter -t <pid> --all
 # Enter specific namespaces of a pid.
 nsenter -t <pid> --net
 nsenter -t <pid> --pid --mount

Example: Enter podman container

Running podman exec -it webserver /bin/sh is basically equivalent to the following.

sudo nsenter -t (podman inspect -f '{{.State.Pid}}' webserver) --all /bin/sh