How to switch Wildfly logging levels

Make logs more verbose:

jboss-cli.bat --connect --user=USER --password=PASS --command="/subsystem=logging/logger=ar.edu.unt.sigea:add(level=DEBUG)"
jboss-cli.bat --connect --user=USER --password=PASS --command="/subsystem=logging/console-handler=CONSOLE:write-attribute(name=level, value=DEBUG)"

...and less:

jboss-cli.bat --connect --user=USER --password=PASS --command="/subsystem=logging/logger=ar.edu.unt.sigea:add(level=INFO)"
jboss-cli.bat --connect --user=USER --password=PASS --command="/subsystem=logging/console-handler=CONSOLE:write-attribute(name=level, value=INFO)"

This approach works even on-the-fly, i.e. without server restart.
Tested with WildFly 9.