cp - copy files and directories

NAME

SYNOPSIS

cp[OPTION]... SOURCE DEST
cp[OPTION]... SOURCE... DIRECTORY
cp[OPTION]... --target-directory=DIRECTORY SOURCE...

DESCRIPTION

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

Mandatory arguments to long options are mandatory for short options too.

-a, --archive ///美] [?ɑr?ka?v]v./n.存档: same as -dpR
--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=link
--no-dereference: never follow symbolic links
-f, --force: if an existing destination file cannot beopened, remove it and try again
-i, --interactive: prompt before overwrite
-H: follow command-line symbolic links
-l, --link: link files instead of copying ///建立hard link的连接文件，而非复制文件本身
-L, --dereference: always follow symbolic links
-p: same as --preserve=mode,ownership,timestamps ///连文件属性一起复制，不使用默认属性
--preserve[=ATTR_LIST]: preserve the specified attributes (default:mode,ownership,timestamps) and security contexts, if possibleadditional attributes: links, all
--no-preserve=ATTR_LIST: don't preserve the specified attributes
--parents: append source path to DIRECTORY
-P: same as `--no-dereference'
-R, -r, --recursive: copy directories recursively
--remove-destination: remove each existing destination file beforeattempting to open it (contrast with --force)
--reply={yes,no,query}: specify how to handle the prompt about anexisting destination file
--sparse=WHEN: control creation of sparse files
--strip-trailing-slashes remove any trailing slashes from each SOURCE: argument
-s, --symbolic-link ///复制成快捷方式: make symbolic links instead of copying
-S, --suffix=SUFFIX: override the usual backup suffix
--target-directory=DIRECTORY: move all SOURCE arguments into DIRECTORY
-u, --update: copy only when the SOURCE file is newerthan the destination file or when thedestination file is missing
-v, --verbose: explain what is being done
-x, --one-file-system: stay on this file system
--help: display this help and exit
-Z, --context=CONTEXT: set security context of copy to CONTEXT
--version: output version information and exit

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

The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.The version control method may be selected via the --backup option or throughthe VERSION_CONTROL environment variable. Here are the values:

none, off: never make backups (even if --backup is given)
numbered, t: make numbered backups
existing, nil: numbered if numbered backups exist, simple otherwise
simple, never: always make simple backups

As a special case, cp makes a backup of SOURCE when the force and backupoptions 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

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

COPYRIGHT

[root@zao2 tmp]# cp -a /var/log/wtmp wtmp ///加-a选项文件属性也不会变
[root@zao2 tmp]# ll /var/log/wtmp wtmp
-rw-rw-r--. 1 root utmp 183936 2010-09-23 08:27 /var/log/wtmp
-rw-rw-r--. 1 root utmp 183936 2010-09-23 08:27 wtmp
[test@zao2 tmp]$ cp -s bashrc bashrc_link
[test@zao2 tmp]$ cp -l bashrc bashrc_hlink
[test@zao2 tmp]$ ll bashrc*
-rw-r--r--. 2 test test 124 2010-09-23 08:54 bashrc
-rw-r--r--. 2 test test 124 2010-09-23 08:54 bashrc_hlink
lrwxrwxrwx. 1 test test 6 2010-09-23 11:09 bashrc_link -> bashrc

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