Selects the proper xkcd now image file for the time.

xkcd_now_selector.sh

#!/bin/bash
# Change this to the directory containing the image files.
XKCDPATH="/usr/local/bin/xkcdnow"

HOUR=$(TZ=Asia/Kamchatka date +%H)
MINUTE=$(date +%M)
if [ $MINUTE -gt 00 -a $MINUTE -le 15 ]; then
 MINUTE=15
elif [ $MINUTE -gt 15 -a $MINUTE -le 30 ]; then
 MINUTE=30
elif [ $MINUTE -gt 30 -a $MINUTE -le 45 ]; then
 MINUTE=45
elif [ $MINUTE -gt 45 -o $MINUTE = 00  ]; then
 MINUTE=00
fi
echo $XKCDPATH$HOUR"h"$MINUTE"m.png"
exit