Linux命令学习总结：cp命令

命令简介：

cp命令用来复制文件或目录。指令英文原义：copy

指令所在路径：/bin/cp

命令语法：

Usage: cp [OPTION]... [-T] SOURCE DEST

or: cp [OPTION]... SOURCE... DIRECTORY

or: cp [OPTION]... -t DIRECTORY SOURCE...

命令参数：

此命令参数是Red Hat EnterPRise Linux Server release 5.7下cp命令参数，不同版本Linux的cp命令参数有可能不同。

使用示例：

1: 查看rmdir命令的帮助信息

[root@DB-Server ~]# cp --help

Usage: cp [OPTION]... [-T] SOURCE DEST

 or: cp [OPTION]... SOURCE... DIRECTORY

 or: cp [OPTION]... -t DIRECTORY SOURCE...

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

Mandatory arguments to long options are mandatory for short options 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=link

 -f, --force if an existing destination file cannot be

 opened, remove it and try again

 -i, --interactive prompt before overwrite

 -H follow command-line symbolic links

 -l, --link link files instead of copying

 -L, --dereference always follow symbolic links

 -P, --no-dereference never follow symbolic links

 -p same as --preserve=mode,ownership,timestamps

 --preserve[=ATTR_LIST] preserve the specified attributes (default:

 mode,ownership,timestamps), if possible

 additional attributes: context, links,

 xattr, all

 -c same as --preserve=context

 --no-preserve=ATTR_LIST don't preserve the specified attributes

 --parents use full source file name under DIRECTORY

 -R, -r, --recursive copy directories recursively

 --remove-destination remove each existing destination file before

 attempting to open it (contrast with --force)

 --sparse=WHEN control creation of sparse files

 --strip-trailing-slashes remove any trailing slashes from each SOURCE

 argument

 -s, --symbolic-link make symbolic 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 normal file

 -u, --update copy only when the SOURCE file is newer

 than the destination file or when the

 destination file is missing

 -v, --verbose explain what is being done

 -x, --one-file-system stay on this file system

 -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 DEST file is 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.

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 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