I am currently running the below jpegoptim command via cron to have jpegoptim look for jpg files to compress.
find /home/public_html/public/uploads -name '*.jpg' -type f -print0 | xargs -0 jpegoptim -o -p --size=300k --strip-all
This works, but is there a way to include .jpeg, .JPG, and .JPEG without having to run the same command multiple times? Also, is it okay to run every hour, or would this keep compressing the same files eventually reducing the quality?
You can match all of *.jpg, *.JPG, *.jpeg, *.JPEG by using two case-insensitive name matches.
find /home/public_html/public/uploads \
'(' -iname '*.jpg' -o -iname '*.jpeg' ')' -type f -print0 \
| xargs -0 jpegoptim -o -p --size=300k --strip-all
You can keep a separate timestamp to avoid reprocessing the same files, for example
find /home/public_html/public/uploads \
-newer .STAMP '(' -iname '*.jpg' -o -iname '*.jpeg' ')' -type f -print0 \
| xargs -0 jpegoptim -o -p --size=300k --strip-all
touch .STAMP