Schily's USER COMMANDS                                  GNUTAR(1)

NAME

     gnutar - emulates the GNU version of the tar archiver

SYNOPSIS

     gnutar  command [ options ] file1 ... filen

DESCRIPTION

     This manual page  documents  the  GNU  version  of  tar,  an
     archiving  program  designed to store and extract files from
     an archive file known as a tarfile.  A tarfile may  be  made
     on  a tape drive, however, it is also common to write a tar-
     file to a normal file. The first argument to gnutar must  be
     one of the options:  Acdrtux, followed by any optional func-
     tions.  The final arguments to gnutar are the names  of  the
     files  or directories which should be archived. The use of a
     directory name always implies that the subdirectories  below
     should be included in the archive.

COMMAND

     One of the following commands must be used:

     -A, --catenate, --concatenate
          append tar files to an archive

     -c, --create
          create a new archive

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

     --delete
          delete from the archive (not for use on mag tapes!)

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

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

     -u, --update
          only append files that are newer than copy in archive

     -x, --extract, --get
          extract files from an archive

OPTIONS

     --atime-preserve
          don't change access times on dumped files

     -b, --block-size N
          block size of Nx512 bytes (default N=20)

Joerg Schilling      Last change: 2020/09/04                    1


Schily's USER COMMANDS                                  GNUTAR(1)

     -B, --read-full-blocks
          reblock as we read (for reading 4.2BSD pipes)

     -C, --directory DIR
          change to directory DIR

     --checkpoint
          print directory names while reading the archive

     -f, --file [HOSTNAME:]F
          use archive file or device F (default /dev/rmt0)

     --force-local
          archive file is local even if has a colon

     -F, --info-script F, --new-volume-script F
          run script at end of each tape (implies -M)

     -G, --incremental
          create/list/extract old GNU-format incremental  backup.
          Since  this  feature did never work in the real GNU tar
          implementation, we cannot support it.

     -g, --listed-incremental F
          create/list/extract new GNU-format  incremental  backup
          Since  this  feature did never work in the real GNU tar
          implementation, we cannot support it.

     -h, --dereference
          don't dump symlinks; dump the files they point to

     -i, --ignore-zeros
          ignore blocks of zeros in archive (normally mean EOF)

     -j, --bzip
          filter the archive through bzip2.

     --ignore-failed-read
          don't exit with non-zero status on unreadable files

     -k, --keep-old-files
          keep existing files; don't overwrite them from archive

     -K, --starting-file F
          begin at file F in the archive

     -l, --one-file-system
          stay in local file system when creating an archive

     -L, --tape-length N
          change tapes after writing N*1024 bytes

Joerg Schilling      Last change: 2020/09/04                    2


Schily's USER COMMANDS                                  GNUTAR(1)

     -m, --modification-time
          don't extract file modified time

     -M, --multi-volume
          create/list/extract multi-volume archive

     -N, --after-date DATE, --newer DATE
          only store files newer than DATE

     -o, --old-archive, --portability
          write a V7 format archive, rather than ANSI format

     -O, --to-stdout
          extract files to standard output

     -p, --same-permissions, --preserve-permissions
          extract all protection information

     -P, --absolute-paths
          don't strip leading `/'s from file names

     --preserve
          like -p -s.

     -R, --record-number
          show record number within archive with each message

     --remove-files
          remove files after adding them to the archive

     -s, --same-order, --preserve-order
          list of names to extract is sorted to match archive

     --same-owner
          create extracted files with the same ownership

     -S, --sparse
          handle sparse files efficiently

     -T, --files-from= F
          get names to extract or create from file F

     --null
          -T reads null-terminated names, disable -C

     --totals
          print total bytes written with --create

     -v, --verbose
          verbosely list files processed

     -V, --label NAME

Joerg Schilling      Last change: 2020/09/04                    3


Schily's USER COMMANDS                                  GNUTAR(1)

          create archive with volume name NAME

     --version
          print gnutar program version number

     -w, --interactive, --confirmation
          ask for confirmation for every action

     -W, --verify
          attempt to verify the archive after writing it

     --exclude FILE
          exclude file FILE

     -X, --exclude-from FILE
          exclude files listed in FILE

     -Z, --compress, --uncompress
          filter the archive through compress

     -z, --gzip, --ungzip
          filter the archive through gzip

     --use-compress-program PROG
          filter the archive through PROG (which must accept -d)

EXTENDED OPTIONS

     The extended options are options taken from star.

     --help
          Prints a summary of the most important options for gnu-
          tar(1) and exits.

     --xhelp
          Prints a summary of the less important options for gnu-
          tar(1) and exits.

     --version
          Prints the gnutar version number string and exists.

     --debug
          print additional debug messages

     xdebug=#

     xd=# set extended debug level

     -/   don't strip leading '/'s from file names

     -..  don't  skip  filenames  that  contain  '..'   in   non-
          interactive extract

Joerg Schilling      Last change: 2020/09/04                    4


Schily's USER COMMANDS                                  GNUTAR(1)

     --secure-links
          don't extract links that start with '/' or contain '..'

     --acl
          handle access control lists

     --xfflags
          handle extended file flags

     bs=# set (output) block size to #

     fs=# set fifo size to #

     --no-fsync
          do not call fsync() for each  extracted  file  (may  be
          dangerous).

     --do-fsync
          call fsync() for each extracted file.

     --time
           print timing info

     --no-statistics
          do not print statistics

     --fifostats
          print fifo statistics

     --no-fifo
          don't use a fifo to optimize data flow from/to tape

     --numeric
          don't use user/group name from tape

     --zstd
          run the input or output through a zstd pipe.

     The options above are not defined by GNU tar.

     For a complete documentation of the star based optione check
     star(1).

EXAMPLES

ENVIRONMENT

FILES

SEE ALSO

     spax(1),  suntar(1),  scpio(1),  tar(1),  cpio(1),   pax(1),
     rcp(1),  mt(1),  rmt(1),  match(1),  dd(1),  sdd(1), rsh(1),
     ssh(1), star(1), star(4), rcmd(3), fssnap(1m)

Joerg Schilling      Last change: 2020/09/04                    5


Schily's USER COMMANDS                                  GNUTAR(1)

DIAGNOSTICS

NOTES

     This gnutar implementation is based on the star  implementa-
     tion and does not implement all features of the original GNU
     tar program.

BUGS

AUTHOR

     Joerg Schilling
     D-13353 Berlin
     Germany

     Mail bugs and suggestions to:

     joerg@schily.net

Joerg Schilling      Last change: 2020/09/04                    6