linux 拷贝不全,linux cp 拷贝不覆盖源文件

CP(1) User Commands CP(1)

NAMEcp -copy files and directories

SYNOPSIScp [OPTION]... [-T] SOURCE DESTcp[OPTION]... SOURCE... DIRECTORYcp [OPTION]... -t DIRECTORY SOURCE...

DESCRIPTION

Copy SOURCE to DEST, or multiple SOURCE(s) to DIRECTORY.

Mandatory arguments tolong options are mandatory for shortoptions too.-a, --archive

same as-dR --preserve=all--backup[=CONTROL]make a backup of each existing destination file

-b like --backup but does not accept an argument--copy-contents

copy contents of special files when recursive-d same as --no-dereference --preserve=links-f, --forceif an existing destination file cannot be opened, remove it and try again (redundant if the -n option is used)-i, --interactive

prompt before overwrite (overrides a previous-n option)-H follow command-line symbolic links inSOURCE-l, --link

link files instead of copying-L, --dereference

always follow symbolic linksinSOURCE-n, --no-clobberdo not overwrite an existing file (overrides a previous -i option)-P, --no-dereference

never follow symbolic linksinSOURCE-p same as --preserve=mode,ownership,timestamps--preserve[=ATTR_LIST]

preserve the specified attributes (default: mode,ownership,timestamps),ifpossible additional attributes: context, links, xattr, all-c same as --preserve=context--no-preserve=ATTR_LIST

don’t preserve the specified attributes--parents

use full sourcefilename under DIRECTORY-R, -r, --recursive

copy directories recursively--reflink[=WHEN]

control clone/CoW copies. See below.--remove-destination

remove each existing destinationfile before attempting to open it (contrast with --force)--sparse=WHEN

control creation of sparse files. See below.--strip-trailing-slashes

remove any trailing slashes from each SOURCE argument-s, --symbolic-linkmakesymbolic links instead of copying-S, --suffix=SUFFIX

override the usual backup suffix-t, --target-directory=DIRECTORY

copy all SOURCE arguments into DIRECTORY-T, --no-target-directory

treat DEST as a normalfile

-u, --update

copy only when the SOURCEfile is newer than the destination file or when the destination fileis missing-v, --verbose

explain what is beingdone

-x, --one-file-system

stay on thisfilesystem-Z, --context=CONTEXT

set security context of copy to CONTEXT--help display this help and exit--version

output version information and exit

By default, sparse SOURCE files are detected by a crude heuristic and the corresponding DESTfileis made sparse as well. That is the behavior selected by--sparse=auto. Specify --sparse=always to create a sparse DEST file whenever the SOURCE file contains a long enough sequence of zero bytes. Use --sparse=never to

inhibit creation of sparse files.

When--reflink[=always] is specified, perform a lightweight copy, where the data blocks are copied only when modified. If this is not possible the copy fails, orif --reflink=auto is specified, fall back to a standard copy.

The backup suffix is ‘~’, unless set with --suffix or SIMPLE_BACKUP_SUFFIX. The version control method may be selected via the --backup option or through the VER-SION_CONTROL environment variable. Here are the values:

none, off

nevermake backups (even if --backup is given)

numbered, tmakenumbered backups

existing, nil

numberedifnumbered backups exist, simple otherwise

simple, never

alwaysmakesimple backups

As a specialcase, cp makes a backup of SOURCE when the force and backup options are given and SOURCE and DEST are the same name for an existing, regular file.

AUTHOR

Written by Torbjorn Granlund, David MacKenzie, and Jim Meyering.

REPORTING BUGS

Reportcp bugs to bug-coreutils@gnu.org

GNU coreutils home page:

General help using GNU software:

Report cp translation bugs to

COPYRIGHT

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

This is free software: you are freeto change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

The full documentationfor cp is maintained as a Texinfo manual. If the info and cpprograms are properly installed at your site, the commandinfo coreutils 'cp invocation'should give you access to the complete manual.

GNU coreutils8.4 March 2017 CP(1)