Changing appliance config

[OTRSSkeptic]

I am not a Linux person, but can someone tell me how to modify the config file in OTRS appliance?

[RStraub]

Well, the most popular editor would be vi or vim. To open the config file, the command is:
vi /opt/otrs/Kernel/Config.pm

But you should look up the vi-commands on google as it isn't intuitive to use.

[crythias]

try also nano if vi is too obscure.