tar 증분백업에 관해 여쭤봅니다

Eterm # tar --help
GNU `tar' saves many files together into a single tape or disk archive, and
can restore individual files from the archive.

Usage: tar [OPTION]... [FILE]...

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.

If a long option shows an argument as mandatory, then it is mandatory
for the equivalent short option also. Similarly for optional arguments.

주요 동작 모드:
-t, --list 아카이브의 내용물을 출력합니다
-x, --extract, --get 아카이브에서 파일을 추출합니다
-c, --create 새로운 아카이브를 만듭니다
-d, --diff, --compare 아카이브와 파일 시스템간의 차이점을 비교합니다
-r, --append 아카이브 끝에 파일을 추가합니다
-u, --update 아카이브 안의 것보다 새로운 파일만 추가합니다
-A, --catenate 아카이브에 tar 파일을 추가합니다
--concatenate -A와 같음
--delete 아카이브로부터 제거합니다 (자기 테이프에선 안됨!)

Operation modifiers:
-W, --verify attempt to verify the archive after writing it
--remove-files remove files after adding them to the archive
-k, --keep-old-files don't replace existing files when extracting
--overwrite overwrite existing files when extracting
--no-overwrite-dir preserve metadata of existing directories
-U, --unlink-first remove each file prior to extracting over it
--recursive-unlink empty hierarchies prior to extracting directory
-S, --sparse handle sparse files efficiently
-O, --to-stdout extract files to standard output
-G, --incremental handle old GNU-format incremental backup
-g, --listed-incremental=FILE
handle new GNU-format incremental backup
--ignore-failed-read do not exit with nonzero on unreadable files
--occurrence[=NUM] process only the NUMth 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 -T option.
NUM defaults to 1.

Handling of file attributes:
--owner=NAME force NAME as owner for added files
--group=NAME force NAME as group for added files
--mode=CHANGES force (symbolic) mode CHANGES for added files
--atime-preserve don't change access times on dumped files
-m, --modification-time don't extract file modified time
--same-owner try extracting files with the same ownership
--no-same-owner extract files as yourself
--numeric-owner always use numbers for user/group names
-p, --same-permissions extract permissions information
--no-same-permissions do not extract permissions information
--preserve-permissions same as -p
-s, --same-order sort names to extract to match archive
--preserve-order same as -s
--preserve same as both -p and -s

장치 선택과 전환:
-f, --file=ARCHIVE 아카이브 파일 또는 ARCHIVE 장치를 사용합니다
--force-local 이름에 콜론이 있는 아카이브 파일도 지역 파일로
인식합니다
--rsh-command=COMMAND rsh 대신 원격 COMMAND를 사용합니다
-[0-7][lmh] 드라이브와 기록 밀도를 지정합니다
-M, --multi-volume 다중 볼륨 아카이브를 생성/출력/추출합니다
-L, --tape-length=NUM NUM x 1024 바이트를 쓴 뒤에 테이프를 바꿉니다
-F, --info-script=FILE 각 테이프의 끝에서 스크립트를 실행합니다
(-M을 포함함)
--new-volume-script=FILE -F FILE과 같음
--volno-file=FILE FILE 안에 있는 볼륨 번호를 사용/갱신합니다

장치 블럭 설정:
-b, --blocking-factor=BLOCK 레코드당 BLOCK x 512 바이트
--record-size=SIZE 레코드당 SIZE 바이트, 512의 배수
-i, --ignore-zeros 아카이브에서 영으로 된 블럭을 무시합니다
(EOF를 의미함)
-B, --read-full-records 읽은 것을 재블럭화합니다 (4.2BSD 파이프용으로)

Archive format selection:
--format=FMTNAME create archive of the given format.
FMTNAME is one of the following:
v7 old V7 tar format
oldgnu GNU format as per tar <= 1.12
ustar POSIX 1003.1-1988 (ustar) format
posix POSIX 1003.1-2001 (pax) format
gnu GNU format
--old-archive, --portability same as --format=v7
--posix same as --format=posix
-V, --label=NAME create archive with volume name NAME
PATTERN at list/extract time, a globbing PATTERN
-j, --bzip2 filter the archive through bzip2
-z, --gzip, --ungzip filter the archive through gzip
-Z, --compress, --uncompress filter the archive through compress
--use-compress-program=PROG filter through PROG (must accept -d)

Local file selection:
-C, --directory=DIR change to directory DIR
-T, --files-from=NAME get names to extract or create from file NAME
--null -T reads null-terminated names, disable -C
--exclude=PATTERN exclude files, given as a PATTERN
-X, --exclude-from=FILE exclude patterns listed in FILE
--anchored exclude patterns match file name start (default)
--no-anchored exclude patterns match after any /
--ignore-case exclusion ignores case
--no-ignore-case exclusion is case sensitive (default)
--wildcards exclude patterns use wildcards (default)
--no-wildcards exclude patterns are plain strings
--wildcards-match-slash exclude pattern wildcards match '/' (default)
--no-wildcards-match-slash exclude pattern wildcards do not match '/'
-P, --absolute-names don't strip leading `/'s from file names
-h, --dereference dump instead the files symlinks point to
--no-recursion avoid descending automatically in directories
-l, --one-file-system stay in local file system when creating archive
-K, --starting-file=NAME begin at file NAME in the archive
--strip-path=NUM strip NUM leading components from file names
before extraction
-N, --newer=DATE-OR-FILE only store files newer than DATE-OR-FILE
--newer-mtime=DATE compare date and time when data changed only
--after-date=DATE same as -N
--backup[=CONTROL] backup before removal, choose version control
--suffix=SUFFIX backup before removal, override usual suffix

Informative output:
--help print this help, then exit
--version print tar program version number, then exit
-v, --verbose verbosely list files processed
--checkpoint print directory names while reading the archive
--check-links print a message if not all links are dumped
--totals print total bytes written while creating archive
--index-file=FILE send verbose output to FILE
-R, --block-number show block number within archive with each message
-w, --interactive ask for confirmation for every action
--confirmation same as -w

Compatibility options:
-o when creating, same as --old-archive
when extracting, same as --no-same-owner

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:

t, numbered make numbered backups
nil, existing numbered if numbered backups exist, simple otherwise
never, simple always make simple backups

ARCHIVE may be FILE, HOST:FILE or USER@HOST:FILE; DATE may be a textual date
or a file name starting with `/' or `.', in which case the file's date is used.
*This* `tar' defaults to `--format=gnu -f- -b20'.

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