doc: more details about Debian/Ubuntu tuning
doc: more details about Debian/Ubuntu tuning

pwielgolaski/gatling,MykolaB/gatling,thkluge/gatling,MykolaB/gatling,gatling/gatling,pwielgolaski/gatling,MykolaB/gatling,gatling/gatling,thkluge/gatling,gatling/gatling,thkluge/gatling,ryez/gatling,ryez/gatling,GabrielPlassard/gatling,timve/gatling,wiacekm/gatling,ryez/gatling,wiacekm/gatling,ryez/gatling,pwielgolaski/gatling,pwielgolaski/gatling,wiacekm/gatling,gatling/gatling,GabrielPlassard/gatling,thkluge/gatling,timve/gatling,timve/gatling,gatling/gatling,wiacekm/gatling,wiacekm/gatling,MykolaB/gatling,GabrielPlassard/gatling,GabrielPlassard/gatling,timve/gatling