Remove No valid subscription=====>

cd /usr/share/javascript/proxmox-widget-toolkit
cp proxmoxlib.js proxmoxlib.js.bak 
nano proxmoxlib.js
(ctrl+w and search No valid subscription)
(change to)

void({ //Ext.Msg.show({
  title: gettext('No valid subscription'),
  
  systemctl restart pveproxy.service
for check
grep -n -B 1 'No valid sub' proxmoxlib.js
  ============================================
  
  # Disable Commercial Repo
sed -i "s/^deb/\#deb/" /etc/apt/sources.list.d/pve-enterprise.list
apt-get update

# Add PVE Community Repo
echo "deb http://download.proxmox.com/debian/pve $(grep "VERSION=" /etc/os-release | sed -n 's/.*(\(.*\)).*/\1/p') pve-no-subscription" > /etc/apt/sources.list.d/pve-no-enterprise.list
apt-get update

# Remove nag
echo "DPkg::Post-Invoke { \"dpkg -V proxmox-widget-toolkit | grep -q '/proxmoxlib\.js$'; if [ \$? -eq 1 ]; then { echo 'Removing subscription nag from UI...'; sed -i '/data.status/{s/\!//;s/Active/NoMoreNagging/}' /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js; }; fi\"; };" > /etc/apt/apt.conf.d/no-nag-script
apt --reinstall install proxmox-widget-toolkit
  
sed -i.bak 's/NotFound/Active/g' /usr/share/perl5/PVE/API2/Subscription.pm && systemctl restart pveproxy.service 

sed -Ezi.bak "s/(Ext.Msg.show\(\{\s+title: gettext\('No valid sub)/void\(\{ \/\/\1/g" /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js && systemctl restart pveproxy.service
===============================================

wget https://github.com/Jamesits/pve-fake-subscription/releases/download/v0.0.7/pve-fake-subscription_0.0.7_all.deb
dpkg -i pve-fake-subscription_0.0.7_all.deb

pve-fake-subscription

lsblk

blkid -o list

fdisk -l

Directory form Disk

mkdir /mnt/usb-data       mount /dev/sdc1 /mnt/usb-data

Setup Permanent Mount

In order to mount your USB drive permanently after reboot add a line into your /etc/fstab config file. If drives are added or removed from the Proxmox the device may change. For this reason the partion UUID will need to be used instead of the block device name.

" ls -l /dev/disk/by-uuid/*  "

lrwxrwxrwx 1 root root 10 Jul  9 14:08 /dev/disk/by-uuid/17217120-ae4b-407a-90a2-d55d83dc23f1 -> ../../sdb1
lrwxrwxrwx 1 root root 10 Jul  9 14:08 /dev/disk/by-uuid/26da1ea2-5a38-47ab-821e-5059d28a7b0f -> ../../dm-1
lrwxrwxrwx 1 root root 10 Jul  9 14:08 /dev/disk/by-uuid/26ff5094-3a30-4921-b4e2-8b96dc7fb163 -> ../../dm-0

Above will give you the uuid. Open the fstab for editing
-------------------------------------------------------

" nano /etc/fstab "

Add this line to your fstab using the correct UUID.-->
-----------------------------------------------------
" /dev/disk/by-uuid/17217120-ae4b-407a-90a2-d55d83dc23f1    /mnt/usb-data         ext4   defaults  0 "
  /dev/disk/by-uuid/17217120-ae4b-407a-90a2-d55d83dc23f1    /mnt/usb-drive         ext4   defaults   0

Mount drive-->" mount -a "

Log in via ssh and

look at the current state: pvecm status
tell the system to temporarily accept that: pvecm expected 2

stop cluster services and corosync on all servers in the cluster. systemctl stop corosync systemctl stop pve-cluster

After do this in all servers, in just one server (choose one to reboot after procedure) do: pmxcfs -l and edit the file /etc/pve/corosync.conf line:

quorum {
provider: corosync_votequorum
}

to:

quorum {
provider: corosync_votequorum
two_node: 1
}

after change, reboot this server.

Join Node to Cluster via Command Line

pvecm add IP-ADDRESS-CLUSTER
pvecm add 10.0.0.99

pvecm add <any_proxmox_node_ip) -force

Remove a Cluster Node

pvecm status
pvecm nodes
systemctl status corosync  <--check if everything is working properly
systemctl restart corosync


systemctl stop pve-cluster
systemctl stop corosync
pmxcfs -l
m /etc/pve/corosync.conf
rm -r /etc/corosync/*
killall pmxcfs
systemctl start pve-cluster


pvecm delnode oldnode,  pvecm delnode ProxmoxNUC , pvecm delnode ProxmoxVE
pvecm expected 1


Change Hostname

Rename a standalone PVE host, you need to edit the following files:
    /etc/hosts
    /etc/hostname

You can get the version of proxmox using the pveversion command.
pveversion