Update WordPress post terms for group of IDs

script.sh

#!/bin/bash

# Store the file post_ids as a variable
POST_IDS=$(<post_ids)

# Loop through each of these IDs

for POST_ID in $POST_IDS
	do
		wp-cli post term set "$POST_ID" category uncategorized --path=/htdocs/__wp__
		echo "Processing post ID $POST_ID..."
	done

post_ids is a simple file containing a list of IDs, like so:

17635
9863
12904
31220