compare.sh

compare.sh

#!/bin/bash
# Original reference: https://www.networkworld.com/article/3538471/how-to-compress-files-on-linux-5-ways.html
# ask user for filename
echo -n "filename> "
read filename

# you need this because some commands will replace the original file
cp $filename $filename-2

# clean up first (in case previous results are still available)
rm $filename.*

time tar cvfz ./$filename.tgz $filename > /dev/null
ls -l $filename.tgz
time zip $filename.zip $filename > /dev/null
ls -l $filename.zip
time bzip2 $filename
ls -l $filename.bz2
# recover original file
cp $filename-2 $filename
time gzip $filename
ls -l $filename.gz
# recover original file
cp $filename-2 $filename
time xz $filename
ls -l $filename.xz

time 7z a $filename.7z $filename-2 > /dev/null
ls -l $filename.7z

echo tgz
time tar xf $filename.tgz > /dev/null

rm $filename
echo zip
time unzip $filename.zip > /dev/null

rm $filename
echo bzip2
time bzip2 -d $filename.bz2 > /dev/null

rm $filename
echo gzip
time gunzip $filename.gz > /dev/null

rm $filename
echo xz
time unxz $filename.xz > /dev/null

rm $filename
echo 7z
time 7z e $filename.7z -o$filename-3 > /dev/null
# show results
# ls -l $filename.*

# replace the original file
mv $filename-2 $filename