Ubuntu Manpage: tarlz - creates tar archives with multimember lzip compression

NAME

       tarlz - creates tar archives with multimember lzip compression

SYNOPSIS

       tarlz operation [options] [files]

DESCRIPTION

       Tarlz  is  a massively parallel (multi-threaded) combined implementation of the tar archiver and the lzip
       compressor. Tarlz uses the compression library lzlib.

       Tarlz creates tar archives using a simplified and safer variant of the POSIX  pax  format  compressed  in
       lzip format, keeping the alignment between tar members and lzip members. The resulting multimember tar.lz
       archive is backward compatible with standard tar tools like GNU tar, which treat it like any other tar.lz
       archive. Tarlz can append files to the end of such compressed archives.

       Keeping  the  alignment  between tar members and lzip members has two advantages. It adds an indexed lzip
       layer on top of the tar archive, making it possible to decode the archive safely  in  parallel.  It  also
       reduces the amount of data lost in case of corruption.

       The  tarlz  file format is a safe POSIX-style backup format. In case of corruption, tarlz can extract all
       the undamaged members from the tar.lz archive, skipping over the damaged members, just like the  standard
       (uncompressed) tar. Moreover, the option '--keep-damaged' can be used to recover as much data as possible
       from each damaged member, and lziprecover can be used to recover some of the damaged members.

   Operations:
       --help display this help and exit

       -V, --version
              output version information and exit

       -A, --concatenate
              append archives to the end of an archive

       -c, --create
              create a new archive

       -d, --diff
              find differences between archive and file system

       --delete
              delete files/directories from an archive

       -r, --append
              append files to the end of an archive

       -t, --list
              list the contents of an archive

       -x, --extract
              extract files/directories from an archive

       -z, --compress
              compress existing POSIX tar archives

       --check-lib
              check version of lzlib and exit

OPTIONS

       -B, --data-size=<bytes>
              set target size of input data blocks [2x8=16 MiB]

       -C, --directory=<dir>
              change to directory <dir>

       -f, --file=<archive>
              use archive file <archive>

       -h, --dereference
              follow symlinks; archive the files they point to

       -n, --threads=<n>
              set number of (de)compression threads [2]

       -o, --output=<file>
              compress to <file> ('-' for stdout)

       -p, --preserve-permissions
              don't subtract the umask on extraction

       -q, --quiet
              suppress all messages

       -v, --verbose
              verbosely list files processed

       -0 .. -9
              set compression level [default 6]

       --uncompressed
              don't compress the archive created

       --asolid
              create solidly compressed appendable archive

       --bsolid
              create per block compressed archive (default)

       --dsolid
              create per directory compressed archive

       --no-solid
              create per file compressed archive

       --solid
              create solidly compressed archive

       --anonymous
              equivalent to '--owner=root --group=root'

       --owner=<owner>
              use <owner> name/ID for files added to archive

       --group=<group>
              use <group> name/ID for files added to archive

       --exclude=<pattern>
              exclude files matching a shell pattern

       --ignore-ids
              ignore differences in owner and group IDs

       --ignore-metadata
              compare only file size and file content

       --ignore-overflow
              ignore mtime overflow differences on 32-bit

       --keep-damaged
              don't delete partially extracted files

       --missing-crc
              exit with error status if missing extended CRC

       --mtime=<date>
              use <date> as mtime for files added to archive

       --out-slots=<n>
              number of 1 MiB output packets buffered [64]

       --warn-newer
              warn if any file is newer than the archive

       If no archive is specified, tarlz tries to read it from standard input or write it to standard output.

       Exit  status:  0  for  a normal exit, 1 for environmental problems (file not found, files differ, invalid
       command-line options, I/O errors, etc), 2 to indicate a corrupt or invalid input file, 3 for an  internal
       consistency error (e.g., bug) which caused tarlz to panic.

REPORTING BUGS

       Report bugs to lzip-bug@nongnu.org
       Tarlz home page: http://www.nongnu.org/lzip/tarlz.html

COPYRIGHT

       Copyright   ©   2025   Antonio   Diaz   Diaz.    License   GPLv2+:   GNU   GPL   version   2   or   later
       <http://gnu.org/licenses/gpl.html>
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to  the  extent
       permitted by law.  Using lzlib 1.15 Using LZ_API_VERSION = 1015

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

REPORTING BUGS

COPYRIGHT

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