How to Zebra Rebuild in koha OPAC Searching Problem

Ø Koha After upgrade from very old version to the latest version searching problem.

Ø The catalogue search on the staff client side is working fine.

Ø But search in the OPAC returns 'No results found.

Ø The problem solution is that execute a full index of Zebra.

Apply following command;

sudo su
koha-rebuild-zebra -f -a -b -v library