General command-line arguments

--config [file]

Alias: -c

Points to an alternative config file to use.

--gui / --nogui

Alias: gui / nogui

Forces GUI or non-GUI usage, depending on context.

Overriding specific config values

Overriding a standard config option (e.g. command-suggestions):

--command-suggestions=false

Overriding a nested config option(e.g. the remote section with address):

--remote.address=test.geysermc.org