xz 압축프로그램

id-util 이라는걸 받다가 발견한 희한한 확장자
검색을 해보니 bzip2 와 같은 LZMA 방식의 무손실 압축기법이고

리눅스에서 명령어는 xz 이다.

$ xz --help Usage: xz [OPTION]... [FILE]... Compress or decompress FILEs in the .xz format. Mandatory arguments to long options are mandatory for short options too.   -z, --compress      force compression   -d, --decompress    force decompression   -t, --test          test compressed file integrity   -l, --list          list information about files   -k, --keep          keep (don't delete) input files   -f, --force         force overwrite of output file and (de)compress links   -c, --stdout        write to standard output and don't delete input files   -0 .. -9            compression preset; 0-2 fast compression, 3-5 good                       compression, 6-9 excellent compression; default is 6   -e, --extreme       use more CPU time when encoding to increase compression                       ratio without increasing memory usage of the decoder   -q, --quiet         suppress warnings; specify twice to suppress errors too   -v, --verbose       be verbose; specify twice for even more verbose   -h, --help          display this short help and exit   -H, --long-help     display the long help (lists also the advanced options)   -V, --version       display the version number and exit With no FILE, or when FILE is -, read standard input. Report bugs to <lasse.collin@tukaani.org> (in English or Finnish). XZ Utils home page: <http://tukaani.org/xz/>

[링크 : http://ftp.gnu.org/gnu/idutils/]
[링크 : http://en.wikipedia.org/wiki/Xz ]
[링크 : http://en.wikipedia.org/wiki/XZ_Utils]