Hello every body I have read guidlien swithc2oms and I have installed osm on ubuntu 18.04. How to do i change stylesheet like Goolge Map?
You have to find the style you like and use installation manual for it. You might like OSM Liberty for example:
but it’s vector style, so you need different data probably and most of the installation will be different than https://switch2osm.org/manually-building-a-tile-server-18-04-lts/
If you look for something looking similar to Google Maps (pastel colors), then OSM Bright is what may interest you. It’s available as a Mapnik style.