TAR(1)

NAME
tar - manual page for tar 1.23

SYNOPSIS
tar [OPTION...] [FILE]...

DESCRIPTION
GNU `tar' saves many files together into a single tape or disk archive, and can restore individual files from the archive. Note that this manual page contains just very brief description (or more like a list of possible functionality) originally generated by the help2man utility. The full documentation for tar is maintained as a Texinfo manual. If the info and tar programs are properly installed at your site, the command `info tar' should give you access to the complete manual.

EXAMPLES

tar -cf archive.tar foo bar
    # Create archive.tar from files foo and bar.

tar -tvf archive.tar
    # List all files in archive.tar verbosely.

tar -xf archive.tar
    # Extract all files from archive.tar.

    Main operation mode:

-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 on mag tapes!)

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

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

--test-label
    test the archive volume label and exit

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

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

-C, --directory=DIR
    change to directory DIR

-f, --file=ARCHIVE
    use archive file or device ARCHIVE

-j, --bzip2
    filter the archive through bzip2

-J, --xz
    filter the archive through xz

-p, --preserve-permissions
    extract information about file permissions (default for superuser)

-v, --verbose
    verbosely list files processed

-z, --gzip
    filter the archive through gzip

Operation modifiers:

--check-device
    check device numbers when creating incremental archives (default)

-g, --listed-incremental=FILE
    handle new GNU-format incremental backup

-G, --incremental
    handle old GNU-format incremental backup

--ignore-failed-read
    do not exit with nonzero on unreadable files

--level=NUMBER
    dump level for created listed-incremental archive

-n, --seek
    archive is seekable

--no-check-device
    do not check device numbers when creating incremental archives

--no-seek
    archive is not seekable

--occurrence[=NUMBER]
    process only the NUMBERth occurrence of each file in the archive; this option is valid only in conjunction with one of the subcommands --delete, --diff, --extract or --list and when a list of files is given either on the command line or via the -T option; NUMBER defaults to 1

--sparse-version=MAJOR[.MINOR]
    set version of the sparse format to use (implies --sparse)

-S, --sparse
    handle sparse files efficiently

Overwrite control:

-k, --keep-old-files
    don't replace existing files when extracting, treat them as errors

--skip-old-files
    don't replace existing files when extracting, silently skip over them

--keep-newer-files
    don't replace existing files that are newer than their archive copies

--no-overwrite-dir
    preserve metadata of existing directories

--overwrite
    overwrite existing files when extracting

--overwrite-dir
    overwrite metadata of existing directories when extracting (default)

--recursive-unlink
    empty hierarchies prior to extracting directory

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

-U, --unlink-first
    remove each file prior to extracting over it

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

Select output stream:

--ignore-command-error ignore exit codes of children

--no-ignore-command-error
    treat non-zero exit codes of children as error

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

--to-command=COMMAND
    pipe extracted files to another program

    Handling of file attributes:

--acls
    Save the ACLs to the archive

--atime-preserve[=METHOD]
    preserve access times on dumped files, either by restoring the times after reading (METHOD='replace'; default) or by not setting the times in the first place (METHOD='system')

--delay-directory-restore
    delay setting modification times and permissions of extracted directories until the end of extraction

--group=NAME
    force NAME as group for added files

--mode=CHANGES
    force (symbolic) mode CHANGES for added files

--mtime=DATE-OR-FILE
    set mtime for added files from DATE-OR-FILE

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

--no-acls
    Don't extract the ACLs from the archive

--no-delay-directory-restore
    cancel the effect of --delay-directory-restore option

--no-same-owner
    extract files as yourself (default for ordinary users)

--no-same-permissions
    apply the user's umask when extracting permissions from the archive (default for ordinary users)

--no-selinux
    Don't extract the SELinux context from the archive

--no-xattrs
    Don't extract the user/root xattrs from the archive

--numeric-owner
    always use numbers for user/group names

--owner=NAME
    force NAME as owner for added files

-p, --preserve-permissions, --same-permissions
    extract information about file permissions (default for superuser)

--preserve
    same as both -p and -s

--same-owner
    try extracting files with the same ownership as exists in the archive (default for superuser)

-s, --preserve-order, --same-order
    sort names to extract to match archive

--selinux
    Save the SELinux context to the archive

--xattrs
    Save the user/root xattrs to the archive

Device selection and switching:

-f, --file=ARCHIVE
    use archive file or device ARCHIVE

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

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

-L, --tape-length=NUMBER
    change tape after writing NUMBER x 1024 bytes

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

--rmt-command=COMMAND
    use given rmt COMMAND instead of rmt

--rsh-command=COMMAND
    use remote COMMAND instead of rsh

--volno-file=FILE
    use/update the volume number in FILE

Device blocking:

-b, --blocking-factor=BLOCKS
    BLOCKS x 512 bytes per record

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

-i, --ignore-zeros
    ignore zeroed blocks in archive (means EOF)

--record-size=NUMBER
    NUMBER of bytes per record, multiple of 512

Archive format selection:

-H, --format=FORMAT
    create archive of the given format

    FORMAT is one of the following:

gnu GNU tar 1.13.x format

oldgnu
    GNU format as per tar <= 1.12

pax POSIX 1003.1-2001 (pax) format

posix
    same as pax

ustar
    POSIX 1003.1-1988 (ustar) format

v7  old V7 tar format

--old-archive, --portability
    same as --format=v7

--pax-option=keyword[[:]=value][,keyword[[:]=value]]...
    control pax keywords

--posix
    same as --format=posix

-V, --label=TEXT
    create archive with volume name TEXT; at list/extract time, use TEXT as a globbing pattern for volume name

Compression options:

-a, --auto-compress
    use archive suffix to determine the compression program

-I, --use-compress-program=PROG
    filter through PROG (must accept -d)

-j, --bzip2
    filter the archive through bzip2

-J, --xz
    filter the archive through xz

--lzip
    filter the archive through lzip

--lzma
    filter the archive through lzma

--lzop

--no-auto-compress
    do not use archive suffix to determine the compression program

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

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

Local file selection:

--add-file=FILE
    add given FILE to the archive (useful if its name starts with a dash)

--backup[=CONTROL]
    backup before removal, choose version CONTROL

-C, --directory=DIR
    change to directory DIR

--exclude=PATTERN
    exclude files, given as a PATTERN

--exclude-backups
    exclude backup and lock files

--exclude-caches
    exclude contents of directories containing CACHEDIR.TAG, except for the tag file itself

--exclude-caches-all
    exclude directories containing CACHEDIR.TAG

--exclude-caches-under exclude everything under directories containing
    CACHEDIR.TAG

--exclude-tag=FILE
    exclude contents of directories containing FILE, except for FILE itself

--exclude-tag-all=FILE exclude directories containing FILE

--exclude-tag-under=FILE
    exclude everything under directories containing FILE

--exclude-vcs
    exclude version control system directories

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

--hard-dereference
    follow hard links; archive and dump the files they refer to

-K, --starting-file=MEMBER-NAME
    begin at member MEMBER-NAME in the archive

--newer-mtime=DATE
    compare date and time when data changed only

--no-null
    disable the effect of the previous --null option

--no-recursion
    avoid descending automatically in directories

--no-unquote
    do not unquote filenames read with -T

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

-N, --newer=DATE-OR-FILE, --after-date=DATE-OR-FILE
    only store files newer than DATE-OR-FILE

--one-file-system
    stay in local file system when creating archive

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

--recursion
    recurse into directories (default)

--suffix=STRING
    backup before removal, override usual suffix ('~' unless overridden by environment variable SIMPLE_BACKUP_SUFFIX)

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

--unquote
    unquote filenames read with -T (default)

-X, --exclude-from=FILE
    exclude patterns listed in FILE

File name transformations:

--strip-components=NUMBER
    strip NUMBER leading components from file names on extraction

--transform=EXPRESSION, --xform=EXPRESSION
    use sed replace EXPRESSION to transform file names

    File name matching options (affect both exclude and include patterns):

--anchored
    patterns match file name start

--ignore-case
    ignore case

--no-anchored
    patterns match after any `/' (default for exclusion)

--no-ignore-case
    case sensitive matching (default)

--no-wildcards
    verbatim string matching

--no-wildcards-match-slash
    wildcards do not match `/'

--wildcards
    use wildcards (default)

--wildcards-match-slash
    wildcards match `/' (default for exclusion)

Informative output:

--checkpoint[=NUMBER]
    display progress messages every NUMBERth record (default 10)

--checkpoint-action=ACTION
    execute ACTION on each checkpoint

--index-file=FILE
    send verbose output to FILE

-l, --check-links
    print a message if not all links are dumped

--no-quote-chars=STRING
    disable quoting for characters from STRING

--quote-chars=STRING
    additionally quote characters from STRING

--quoting-style=STYLE
    set name quoting style; see below for valid STYLE values

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

--show-defaults
    show tar defaults

--show-omitted-dirs
    when listing or extracting, list each directory that does not match search criteria

--show-transformed-names, --show-stored-names
    show file or archive names after transformation

--totals[=SIGNAL]
    print total bytes after processing the archive; with an argument - print total bytes when this SIGNAL is delivered; Allowed signals are: SIGHUP, SIGQUIT, SIGINT, SIGUSR1 and SIGUSR2; the names without SIG prefix are also accepted

--utc
    print file modification dates in UTC

-v, --verbose
    verbosely list files processed

--warning=KEYWORD
    warning control

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

Compatibility options:

-o  when creating, same as --old-archive; when extracting, same as --no-same-owner

Other options:

-?, --help
    give this help list

--restrict
    disable use of some potentially harmful options

--usage
    give a short usage message

--version
    print program version

Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options.

The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX. The version control may be set with --backup or VERSION_CONTROL, values are:

none, off
    never make backups

t, numbered
    make numbered backups

nil, existing
    numbered if numbered backups exist, simple otherwise

never, simple
    always make simple backups

Valid arguments for the --quoting-style option are:

    literal shell shell-always c c-maybe escape locale clocale

DEFAULTS
*This* tar defaults to: --format=gnu -f- -b20 --quoting-style=escape --rmt-command=/sbin/rmt --rsh-command=/usr/bin/rsh

AUTHOR
Written by John Gilmore and Jay Fenlason.

REPORTING BUGS
Report bugs to <bug-tar@gnu.org>.

COPYRIGHT
Copyright © 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 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.