proxmox list containers on al nodes

#!/usr/bin/env bash

IFS=$'\n'
for line in $(cat /root/.ssh/authorized_keys); do
    host=$(echo "$line" | grep -Eo "@.*$" | tr -d @)
    if [ ! -e "/etc/pve/nodes/$host" ]; then
        continue
    fi
    echo "Containers on ${host}:"
    ssh "$host" "vzlist -a"
done