Sources:

• https://www.taniarascia.com/how-to-create-and-use-bash-scripts/
• https://www.presslabs.com/code/wp-cli-guide-wp-term/
• https://stackoverflow.com/questions/59084630/wp-cli-wc-product-create-custom-attributes

My recipes:

# Check themes, core, plugins for updates 
alias check-all='wp core check-update && wp plugin list --update=available && wp theme list --update=available'

# Update all that it can be updated
alias update-all='wp core update && wp plugin update --all && wp theme update --all'

# Get all product ids OF category 53
wp wc product list --category=53 --user=2 --field=id

# Update the category of  product with id 374 to 33
wp wc product update 374 --categories='[{"id":33}]' --user=2

# Move products to another category. You have to add the current category otherwise it does not work.

!/usr/bin/bash

for post in $(wp wc product list --category=54 --user=2 --field=id)
do
wp wc product update $post --categories='[{"id":52},{"id":54}]' --user=2
done

# Add these attributes to the products of this category
!/bin/bash
for post in $(wp wc product list --category=57 --user=2 --format=ids)
do
wp wc product update $post  --user=2  --attributes='[{"id":1,"name":"Color","position":0, "visible":true,"options":["Blue","Red"]}]';
done