The lxc-info command displays information about a container:

$ lxc-info -n containerName
Name:   testContainer
State:   STOPPED

This command will only display information about a single container, though. Using a shell loop, as described in Chapter 1, Shell Something Out, we can display information about all the containers:

$ for c in `lxc-ls` 
do
lxc-info -n $c
echo
done
Name:  name1
State:  STOPPED

Name:  name2
State:  RUNNING
PID:  1234
IP  10.0.3.225
CPU use:  4.48 seconds
BlkIO use:  728.00 KiB
Memory use:  15.07 MiB
KMem use:  2.40 MiB
Link:  vethMU5I00
 TX bytes:  20.48 KiB
 RX bytes:  30.01 KiB
 Total bytes:  50.49 KiB

If the container is stopped, there is no status information available. Running containers record their CPU, memory, disk (block), I/O, and network usage. This tool lets you monitor your containers to see which ones are most active.