How to Backup Your Data
To backup your data/files from your server, you will need your encryption key file and password.
Your repository will be:
Account_Name@pbs@hostname/IP:Account_Name
Example command for backing up a folder or file
proxmox-backup-client backup [linux_user].pxar:[folder/file path] --repository [your repository link] --keyfile /path/to/encryption/file.key
For more in depth or complex backup commands, please refer to Proxmox's Backup Usage Manual.