# Reinstalling the Operating System
## **Reinstalling the Operating System (VMmanager 6)**
Reinstalling the operating system allows you to reset your VPS or Dedicated Server to a clean state.\
UP-NETWORK uses **VMmanager 6**, which provides a safe, automated OS reinstallation workflow.
This guide explains how to access the reinstall interface, choose an OS template, configure SSH keys, and start the reinstall process.
***
### **1. Before You Start**
#### ✔ Reinstalling the OS will:
* Delete all data on the server
* reset all partitions & network configs
* reinstall the selected OS template
* generate a new root/admin password (if applicable)
{% hint style="warning" %}
#### ❗ Make sure to:
* Backup your data **before reinstalling**
* Remove encryption or custom bootloaders
* Save your IPv6 configuration if you use it
{% endhint %}
***
## **2. Accessing the Reinstall Page**
#### **VPS**
{% stepper %}
{% step %}
### Access via VPS dashboard
Go to your dashboard:\
[https://vps.upn.li](https://vps.upn.li/)
Select your VPS, open the left menu, and click **Reinstall OS**.
{% endstep %}
{% endstepper %}
#### **Dedicated Server**
{% stepper %}
{% step %}
### Access via UP-NETWORK customer area
Go to the UP-NETWORK customer area, open your dedicated server, click **Manage in VMmanager**, then click **Reinstall OS**.
{% endstep %}
{% endstepper %}
***
## **3. Choosing an OS Template**
VMmanager 6 displays all OS templates available for your service.
#### Available categories may include:
* **Linux**: Debian, Ubuntu, AlmaLinux, Rocky, CentOS Stream
* **Windows Server**
* **BSD** (FreeBSD, pfSense, etc.)
* **Custom ISO** (if enabled by support)
* **Cloud-Init enabled images**
Each OS template comes with:
* Version (example: Ubuntu 22.04 LTS)
* Architecture (x86\_64)
* Cloud-Init support (if included)
* Optional SSH key injection
Choose the template you want to install.
***
## **4. Setting Up Access Credentials**
According to VMmanager 6 standards:
#### A. Using a root/admin password
VMmanager can generate a new password automatically.
{% stepper %}
{% step %}
Check **“Set password”**
{% endstep %}
{% step %}
Enter your desired password
{% endstep %}
{% step %}
Leave blank to auto-generate (the new password will be shown after installation)
{% endstep %}
{% endstepper %}
***
#### B. Using an SSH Key (recommended)
VMmanager 6 supports SSH key injection via Cloud-Init.
{% stepper %}
{% step %}
Tick **“Use SSH key”**
{% endstep %}
{% step %}
Paste your public key (format: `ssh-ed25519 ...` or `ssh-rsa ...`)
{% endstep %}
{% step %}
VMmanager will add it automatically to `/root/.ssh/authorized_keys`
{% endstep %}
{% endstepper %}
This is the most secure method.
***
## **5. Optional — Custom Disk Partitioning**
Depending on the OS template, VMmanager 6 may allow:
* Automatic partitioning
* Custom disk layout
* LVM or ext4 selection
* Encryption (if template supports it)
UP-NETWORK defaults to:
* **ext4**
* Automatic partitioning
* Recommended layout for SSD/NVMe
***
## **6. Starting the Reinstallation**
When all settings are ready:
{% stepper %}
{% step %}
Click **“Reinstall”**
{% endstep %}
{% step %}
Confirm — VMmanager will ask to confirm data loss.
{% endstep %}
{% step %}
The server will reboot into ISO / deployment mode
{% endstep %}
{% step %}
Installation begins automatically
{% endstep %}
{% endstepper %}
***
## **7. Installation Duration**
Typical install times:
| OS | Time |
| --------------- | -------------------- |
| Debian/Ubuntu | 30–60 seconds |
| AlmaLinux/Rocky | 1–2 minutes |
| Windows Server | 5–10 minutes |
| Custom ISO | depends on installer |
The VMmanager panel will show the installation progress and status.
***
## **8. Retrieving Your New Login Credentials**
After installation, VMmanager displays:
* The **new root/admin password** (if password method chosen)
* The server's **IPv4**
* The server’s **IPv6** (if enabled)
* Access instructions
Example VMmanager output:
```
OS successfully installed.
Login: root
Password: ********
IPv4: XXX
IPv6: XXX
```
***
## **9. After Installation — Recommended Actions**
#### ✔ Update system packages
```bash
apt update && apt upgrade -y
```
#### ✔ Reconfigure IPv6 if necessary
(see the IPv6 tutorial)
#### ✔ Reapply your firewall rules
UP-NETWORK recommends:
* UFW (Ubuntu)
* Firewalld (RHEL)
* Windows Firewall for Windows
#### ✔ Reimport SSH keys
If you did not use Cloud-Init SSH injection.
***
## **10. Troubleshooting**
No network after reinstall
Check:
* `ens18` or `eth0` naming
* DHCP vs static assignment
* IPv6 prefix and gateway (`IPV6_GTW`)
Password not working
* VMmanager may enforce Cloud-Init for certain templates
* Use SSH key method instead
* Check the VMmanager console (`VNC / HTML5`)
Stuck on “installing OS”
Possible causes:
* Custom ISO errors
* Disk full
* Bootloader lock
* Corrupted FS
Open a ticket and UP-NETWORK engineers will assist you.
***
## Summary
* All reinstallations are done through **VMmanager 6**
* Choose your OS → set password/SSH → reinstall
* The server reboots and wipes all data
* New login credentials are displayed after installation
---
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