Visualization update

docs.it4i/salomon/visualization.md

-# Using of Visualization Servers
+# Visualization Servers
 
-## Remote Visualization Nodes
-
-For remote visualization two nodes with NICE DCV software are available each configured:
+Remote visualization with NICE DCV software is availabe on two nodes.
 
 | Node          | Count | Processor                         | Cores | Memory | GPU Accelerator              |
 |---------------|-------|-----------------------------------|-------|--------|------------------------------|
 | visualization | 2     | 2 x Intel Xeon E5-2695v3, 2.3 GHz | 28    | 512 GB | NVIDIA QUADRO K5000 4 GB     |
 
-## Resources Allocation Policy
+## Resource Allocation Policy
 
 | queue | active project | project resources | nodes | min ncpus | priority | authorization | walltime |
 |-------|----------------|-------------------|-------|-----------|----------|---------------|----------|
@@ -29,12 +27,26 @@ For remote visualization two nodes with NICE DCV software are available each con
 
 **Install VPN client** [VPN Access](../general/accessing-the-clusters/vpn-access/) (user-computer)
 
+!!! note
+    Visualisation server is a compute node. You are not able to SSH with your private key. There are two solutions available to solve login issue.
+
 ### Windows Users
 
-**Install WinSCP client** (user-computer) [Download WinSCP installer](https://winscp.net/download/WinSCP-5.13.3-Setup.exe)
+**Solution 1 - Add the public fingerprint**
+
+* Generate public fingerprint for your private key with PuTTYgen
+
+![](../img/puttygen.png)
+
+* Add this key to `~/.ssh/authorized_keys` on the cluster
 
-**Config WinSCP**
+![](../img/addsshkey.png)
 
+* Use your standard SSH key to connect to visualization server
+
+**Solution 2 - Copy private key from the cluster**
+
+* Install WinSCP client (user-computer) [Download WinSCP installer](https://winscp.net/download/WinSCP-5.13.3-Setup.exe)
 * Add credentials
 
 ![](../img/viz1-win.png)
@@ -44,17 +56,23 @@ For remote visualization two nodes with NICE DCV software are available each con
 ![](../img/viz2-win.png)
 
 * Save
+* Copy `~/.ssh/id_rsa` to your computer
+* Convert key to PuTTY format with PuTTYgen
+
+![](../img/puttygenconvert.png)
+
+* Use this new ssh key to connect to visualization server
 
 **Install PuTTY**
 
 * [Overview](https://docs.it4i.cz/general/accessing-the-clusters/shell-access-and-data-transfer/putty/)
 * [Download PuTTY installer](https://the.earth.li/~sgtatham/putty/latest/w64/putty-64bit-0.70-installer.msi)
-* Config PuTTY
+* Configure PuTTY
 
 ![](../img/viz3-win.png)
 
 * Add credentials and key file (create 3x sessions: **vizserv1.salomon.it4i.cz**, **vizserv2.salomon.it4i.cz**, **login1.salomon.it4i.cz**)
-* Config SSH tunnels (user-computer) (only for sessions vizserv1 and vizserv2) - ports: **5901**, **5902**, **7300-7305**
+* Config SSH tunnels (user-computer) (for sessions vizserv1 and vizserv2 only) - ports: **5901**, **5902**, **7300-7305**
 
 ![](../img/viz4-win.png)
 
@@ -161,4 +179,4 @@ $ qsub -I -q qviz -A OPEN-XX-XX -l select=1:ncpus=4:host=vizserv2,walltime=04:00
 
 ![](../img/viz3.png)
 
-**LOGOUT FROM MENU: System->Logout**
+**LOGOUT FROM MENU: System->Logout**
\ No newline at end of file