I don’t normally suggest snacking but if it saves you from relapsing on sugary or processed carbs, then by all means, put those cravings in check with a fatty snack:
Pork rinds, deviled eggs, cheese sticks and nuts (be careful with nuts since they do have some carbs) helped me get over the rough spots of my first week in keto.
But ideally you want to try to eat meals that have lots of good fats (and protein) in them and eventually this will allow you to not be hungry long enough to make it the next proper meal. Protein and fat are what keeps you full and keeps your satiety hormone (leptin) happy.
Here’s a pretty good article that offers suggestions as to what foods will help increase your dietary fat.