The blacklists are downloaded every night, you can’t change any file in /var/squidGuard/blacklists.
If you found an error, you should report it to the blacklist provider (univ Tolouse, shalla, etc).
If you want to add a site, use custom categories or global white/black lists.
I want to unblock a domain to all users and groups which is listed in /var/squidGuard/blacklists/shopping/domains file But remaining all sites to be blocked.
Could you please suggest a scenario how to achieve this.