compress file using best command between, gzip, gzip -9, bzip2, bzip2 -9, lzma, lzma -9. (bash shell) Usage "$ . zip.sh filename". th_TH:บีบอัดไฟล์โดยเลือกคำสั่งที่ดีที่สุดระหว่าง, gzip, gzip -9, bzip2, bzip2 -9, lzma, lzma -9.

zip.sh

. /dev/null

set -- "$1" "`wc -c -- "$1" | tee /dev/stderr | awk '{print$1}'`" '' :
echo "${@:2}" ; 

set -- "$1" "$2" "`gzip -c -- "$1" | wc -c`" "${@:4}"
echo "${@:2}" ; (( "$3" < "$2" )) && set -- "$1" "$3" '' gzip
set -- "$1" "$2" "`gzip -c -9 -- "$1" | wc -c`" "${@:4}"
echo "${@:2}" ; (( "$3" < "$2" )) && set -- "$1" "$3" '' gzip -9
set -- "$1" "$2" "`bzip2 -c -- "$1" | wc -c`" "${@:4}"
echo "${@:2}" ; (( "$3" < "$2" )) && set -- "$1" "$3" '' bzip2
set -- "$1" "$2" "`bzip2 -c -9 -- "$1" | wc -c`" "${@:4}"
echo "${@:2}" ; (( "$3" < "$2" )) && set -- "$1" "$3" '' bzip2 -9
set -- "$1" "$2" "`lzma -c -- "$1" | wc -c`" "${@:4}"
echo "${@:2}" ; (( "$3" < "$2" )) && set -- "$1" "$3" '' lzma
set -- "$1" "$2" "`lzma -c -9 -- "$1" | wc -c`" "${@:4}"
echo "${@:2}" ; (( "$3" < "$2" )) && set -- "$1" "$3" '' lzma -9

echo "${@:2}" ;
set -- "${@:4}" -- "$1"
echo "$@" ;
"$@"

. /dev/null

https://m.facebook.com/story.php?story_fbid=10156414058936192&id=705691191 <-- more description in th_TH language