adding in the shell script that does the magic

addcomment.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+for f in *; do
+
+	# First display the image ...
+
+	# Check if Chafa is installed, otherwise use feh
+	# To install feh: $sudo apt install feh
+	if ! [ -x "$(command -v chafa)" ]; then
+		feh $f
+	else
+		chafa $f
+	fi
+
+	# Then read the current comment of this image ...
+
+	CURRENT=$(exiftool -S -Comment $f | sed 's/[^ ]* //')
+	echo "Currently this image is described as: $CURRENT"
+
+	# Ask if the comment should be changed ...
+
+	read -p "Would you like to edit this comment? [y/n] " choice
+
+	case "$choice" in
+		y|Y ) read -p "Please enter your new comment: " comment ;;
+		n|N ) echo "Oke" && comment=$CURRENT;;
+		* ) echo "Sorry that is invalid. Please choose y or n.";;
+	esac
+
+	# Save the new comment into the exif data
+
+	exiftool $f -overwrite_original -Comment="$comment"
+done