qm guest passwd
Set the password for a user on QEMU/KVM Virtual Machine Manager. More information: https://pve.proxmox.com/pve-docs/qm.1.html.
- Set a password for a specific user in a virtual machine interactively:
qm guest passwd vm_id username
- Set an already hashed password for a specific user in a virtual machine interactively:
qm guest passwd vm_id username --crypted 1