BASH script: resize pictures in zip archive

It's tested on CentOS 7.

Before use it, you must install zip, unzip and ImageMagick:

yum install zip unzip ImageMagick

Create a exectable file (it names "zipresizer.sh" here.) with Code below:

#!/bin/bash
IFS=$'\n'
mkdir ./tmp
mkdir ./produced
for UNZIPFILE in $( ls *.zip ); do
 echo item: $UNZIPFILE
 UNZIPCACHE="${UNZIPFILE%.zip}"
 mkdir ./tmp/$UNZIPCACHE
 unzip $UNZIPFILE -d tmp/$UNZIPCACHE
 find ./tmp/$UNZIPCACHE -name *.jpg -print -exec mogrify -resize x1308\> {} \;
 find ./tmp/$UNZIPCACHE -name *.png -print -exec mogrify -resize x1308\> {} \;
 find . -name *.txt -exec rm -f {} \;
 find . -name *.url -exec rm -f {} \;
 cd ./tmp
 zip -0 -r ../produced/$UNZIPFILE ./$UNZIPCACHE
 cd ..
done
echo done\!
unset IFS

You can change resize parameter with width x height like this:

 find ./tmp/$UNZIPCACHE -name *.jpg -print -exec mogrify -resize 512x1308 {} \;

or by percentage:

 find ./tmp/$UNZIPCACHE -name *.jpg -print -exec mogrify -resize 50% {} \;

Execute: copy zipresizer.sh to the directory that you wanna to resize, and execute it use ". "

# . zipresizer.sh

Warning:
1. All zip archive files in directory will be resized.
2. Verify your permissions.
3. not use "./" like below when you execute it:

# ./zipresizer.sh

4. Only jpg and png will be resize.
5. It will delete *.txt and *.url in your zip archive file.
6. You must delete "tmp" manually after resizing done.