still got same issue CRITICAL SYSTEM ERROR
You posted a screenshot saying you have a critical system error but your screenshot says otherwise
I do in Putty view
This is a different screenshot than the one above.
Use “find / -name fwconsole” and post the result.
Either log into the server as root, or use ‘sudo’ to execute the command ‘chmod +x /usr/sbin/fwconsole’
After that, you should be able to run fwconsole without a problem…
I also ran the update script from the Wiki, and got the error shown above (the ** CRITICAL SYSTEM ERROR ** thing).
Here’s fwconsole located:
Where do I go from here?
I’ve tried asking about upgrade problems earlier here. As I’m no Linux wizard, I didn’t think to check the console… 
However, the system is working as it did before.