img-optimize/crons/jpg-png-cron.sh

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#!/bin/bash
## cronjob to optimize PNG/JPG images
## images path are listed in sites.csv
## written by VirtuBox (https://virtubox.net)
sites="/var/www/yoursite.tld/images \
/var/www/yourothersite.tld/content/images \
/var/www/yourthirdsite.tld/wp-content/uploads"
for site in $sites; do
# optimize jpg images created in the last 24 hours
find "$site" -ctime 0 -type f \( -iname "*.jpg" -o -iname "*.jpeg" \) -print0 | xargs -0 jpegoptim --preserve --strip-all -m82 >> /var/log/jpg-png-cron.log 2>&1
# optimize png images created in the last 24 hours
find "$site" -ctime 0 -type f -iname '*.png' -print0 | xargs -0 optipng -o7 -strip all >> /var/log/jpg-png-cron.log 2>&1
done