Dear All, I am using koha 17.03 version in ubuntu. I am getting the following error after restarting the apache. root@GSS-LIBRARY-SERVER:/home/gss-library-server# sudo service apache2 restart * Restarting web server apache2 [Mon Apr 02 13:52:52.249818 2018] [core:warn] [pid 12703] AH00111: Config variable ${instance} is not defined [Mon Apr 02 13:52:52.249868 2018] [core:warn] [pid 12703] AH00111: Config variable ${instance} is not defined AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1. Set the 'ServerName' directive globally to suppress this message (98)Address already in use: AH00072: make_sock: could not bind to address [::]:8000 (98)Address already in use: AH00072: make_sock: could not bind to address [::]:8001 [fail] * The apache2 instance did not start within 20 seconds. Please read the log files to discover problems Now, I am not able to getting the library opac and staff client. Please help me. Ashok. New Delhi