diff --git a/.docs/server-installation.md b/.docs/server-installation.md
index 78c28a2..33a1913 100644
--- a/.docs/server-installation.md
+++ b/.docs/server-installation.md
@@ -23,7 +23,8 @@ Ubuntu 24 Headless Server minimal installation is required.
 > node -v # should print `v22.11.0`  
 > npm -v # should print `10.9.0`  
 
-### Image processing using Sharp needs a specific memory manager for NodeJS:  
+### Memory manager for NodeJS  
+Image processing using Sharp needs a specific memory manager for NodeJS:
 > sudo apt install git-all  
 > sudo apt install gcc  
 > sudo apt-get install build-essential  
@@ -52,12 +53,10 @@ or
 
 2. NGINX. Important config - set redirect from http to https. Virtual host config example - [**nginx.`your_dl_name`.conf** ](./nginx.your_dl_name.conf)
 3. PM2. Install and enable the process manager for nodejs (after NodeJS and NPM are installed). Config and run using the nonroot user.
-4. SPHINX. Install in **/opt/sphinx**. Create a service using config in sphinx.service. Copy to sphinx bin/ folder and configure FTS indexes in [**sphinx.conf**](./sphinx.conf) template. Make sure all paths are available. **/opt/sphinx** should be owned by the nonroot user.
 
 ## Tools to install
 1. Let's Encrypt CertBot, for certificates issuing and renewal. The certificate is installed using the following command: `certbot certonly -d your.server.name`. Use `--nginx` or `--apache` in order to have automatic renewal
 1. ffmpeg - for converting video and audio content
-1. ghostscript - for creating thumbnails for PDF files
 1. OpenSSH Server - to be able to access the server remotely
 1. UFW - Firewall, configure to allow access only on 443, 80, and 22 (if possible, only for specific hosts)
 1. rsync - for backup
@@ -98,10 +97,19 @@ Enable at boot:
 Check status with:
 > sudo systemctl status autossh-remote-tunnel
 
-### SSHD config on remote server (/etc/ssh/sshd_config):  
+### SSHD config on remote server  
 
+Edit `/etc/ssh/sshd_config`
+```
 > ClientAliveInterval 600  
 > ClientAliveCountMax 12
+```
+
+Check the new configuration:  
+> sudo sshd -t  
+
+Restart the service:
+> sudo systemctl restart sshd  
 
 ## Issue certificates
 > certbot certonly --nginx -d pronature-disk.bg73.net  
@@ -154,18 +162,18 @@ server {
 }
 ```
 
-## Firewall, enable services:
+## Firewall, enable services
 
-SSH Access:
+SSH Access:  
 > sudo ufw allow 22  
 
-HTTP:
+HTTP:  
 > sudo ufw allow 80  
 
-HTTP over SSL:
+HTTP over SSL:  
 > sudo ufw allow 443  
 
-Start the FW:
+Start the FW:  
 > sudo ufw enable  
 
 ## Set up the application