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Important File Locations

/etc/pve/authkey.pub Public key used by the ticket system
/etc/pve/ceph.conf Ceph configuration file (note: /etc/ceph/ceph.conf is a symbolic link to this)
/etc/pve/corosync.conf Corosync cluster configuration file (prior to Proxmox VE 4.x, this file was called cluster.conf)
/etc/pve/datacenter.cfg Proxmox VE data center-wide configuration (keyboard layout, proxy, …)
/etc/pve/domains.cfg Proxmox VE authentication domains
/etc/pve/firewall/cluster.fw Firewall configuration applied to all nodes
/etc/pve/firewall/<NAME>.fw Firewall configuration for individual nodes
/etc/pve/firewall/<VMID>.fw Firewall configuration for VMs and containers
/etc/pve/ha/crm_commands Displays HA operations that are currently being carried out by the CRM
/etc/pve/ha/manager_status JSON-formatted information regarding HA services on the cluster
/etc/pve/ha/resources.cfg Resources managed by high availability, and their current state
/etc/pve/nodes/<NAME>/config Node-specific configuration
/etc/pve/nodes/<NAME>/lxc/<VMID>.conf VM configuration data for LXC containers
/etc/pve/nodes/<NAME>/openvz/ Prior to PVE 4.0, used for container configuration data (deprecated, removed soon)
/etc/pve/nodes/<NAME>/pve-ssl.key Private SSL key for pve-ssl.pem
/etc/pve/nodes/<NAME>/pve-ssl.pem Public SSL certificate for web server (signed by cluster CA)
/etc/pve/nodes/<NAME>/pveproxy-ssl.key Private SSL key for pveproxy-ssl.pem (optional)
/etc/pve/nodes/<NAME>/pveproxy-ssl.pem Public SSL certificate (chain) for web server (optional override for pve-ssl.pem)
/etc/pve/nodes/<NAME>/qemu-server/<VMID>.conf VM configuration data for KVM VMs
/etc/pve/priv/authkey.key Private key used by ticket system
/etc/pve/priv/authorized_keys SSH keys of cluster members for authentication
/etc/pve/priv/ceph* Ceph authentication keys and associated capabilities
/etc/pve/priv/known_hosts SSH keys of the cluster members for verification
/etc/pve/priv/lock/* Lock files used by various services to ensure safe cluster-wide operations
/etc/pve/priv/pve-root-ca.key Private key of cluster CA
/etc/pve/priv/shadow.cfg Shadow password file for PVE Realm users
/etc/pve/priv/storage/<STORAGE-ID>.pw Contains the password of a storage in plain text
/etc/pve/priv/tfa.cfg Base64-encoded two-factor authentication configuration
/etc/pve/priv/token.cfg API token secrets of all tokens
/etc/pve/pve-root-ca.pem Public certificate of cluster CA
/etc/pve/pve-www.key Private key used for generating CSRF tokens
/etc/pve/sdn/* Shared configuration files for Software Defined Networking (SDN)
/etc/pve/status.cfg Proxmox VE external metrics server configuration
/etc/pve/storage.cfg Proxmox VE storage configuration
/etc/pve/user.cfg Proxmox VE access control configuration (users/groups/…)
/etc/pve/virtual-guest/cpu-models.conf For storing custom CPU models
/etc/pve/vzdump.cron Cluster-wide vzdump backup-job schedule