Updating the broken links

Author: sushantjrao

articles/operator-nexus/howto-platform-prerequisites.md

@@ -143,8 +143,8 @@ Terminal Server has been deployed and configured as follows:
     - HTTP access is enabled
   - Terminal Server interface is connected to the operators on-premises Provider Edge routers (PEs) and configured with the IP addresses and credentials
   - Terminal Server is accessible from the management VPN
-  - To upgrade the terminal server to 24.11.2 [refer](/articles/operator-nexus/howto-upgrade-os-of-terminal-server.md)
-  - To setup single session and session timeout for serial console [refer](/articles/operator-nexus/howto-restrict-serial-port-access-and-set-timeout-on-terminal-server.md)
+  - To upgrade the terminal server to 24.11.2 [refer](./howto-upgrade-os-of-terminal-server.md)
+  - To setup single session and session timeout for serial console [refer](./howto-restrict-serial-port-access-and-set-timeout-on-terminal-server.md)
 
 ### Step 1: Setting up hostname
 

articles/operator-nexus/howto-upgrade-os-of-terminal-server.md

@@ -61,10 +61,10 @@ After downloading the OS image, verify its integrity using SHA1 checksum validat
 
 ### Step 1: Download the SHA checksum file  
 
-Use `wget` or any other utility to download the checksum file corresponding to the OS version:  
+Use `wget` or any other utility to download the checksum file corresponding to the OS version `24.11.2`
 
 ```bash
-wget https://ftp.opengear.com/download/opengear_appliances/OM/current/SHASUMS
+wget https://ftp.opengear.com/download/opengear_appliances/OM/archive/24.11.2/SHASUMS
 ```
 
 ### Step 2: Compute and compare the SHA1 checksum