linux cp -dr
时间: 2024-08-09 15:01:29 浏览: 89
`cp -dr` 是 Linux 和 Unix 系统中用于复制文件和目录的命令。这个命令包含几个选项:
- `c`: 这表示“copy”,它就是这个命令的基本功能,即复制文件或目录。
- `p`: 表示 "preserve",意味着在复制过程中会保留源文件的时间戳、权限以及设备属性等元数据。
- `d`: 表示 "directory",当复制目录时,这将创建新的目录结构,并复制所有嵌套目录的内容。
- `-r`: 这是一个递归标志,用于复制目录及其所有内容。
当你一起使用 `cp -dr` 时,该命令不仅复制文件,还会递归地复制它们所包含的所有子文件及子目录,同时保持原有的所有元信息。
举个例子,如果你想要把当前目录下的某个文件 `file.txt` 复制到用户主目录下,并保持所有元信息,你可以运行:
```
cp -dr file.txt ~/
```
这里的 `~` 表示当前用户的主目录。如果目标目录不存在,那么在复制文件之前会自动创建相应的目录层次结构。如果源目录是文件,而目标已经存在,则需要给予足够的权限才能覆盖现有的文件;如果是目录的话,则直接复制目录及其内容。
关于 `cp -dr` 的更多用法和详细说明,可以参考官方文档:
```bash
man cp
```
相关问题
扮演terminal linux,执行 cp --help命令
好的,以下是 `cp --help` 命令的输出:
```
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
--attributes-only don't copy the file data, just the attributes
--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, --force if an existing destination file cannot be
opened, remove it and try again (this option
is ignored when the -n option is also used)
-i, --interactive prompt before overwrite (overrides a previous -n
option)
-H follow command-line symbolic links in SOURCE
-l, --link hard link files instead of copying
-L, --dereference always follow symbolic links in SOURCE
-n, --no-clobber do not overwrite an existing file (overrides
a previous -i option)
-P, --no-dereference never follow symbolic links in SOURCE
-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
--no-preserve=ATTR_LIST don't preserve the specified attributes
--parents use full source file name under DIRECTORY
-R, -r, --recursive copy directories recursively
--reflink[=WHEN] control clone/CoW copies. See below
--remove-destination remove each existing destination file 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-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 set SELinux security context of destination
file to default type
--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.
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, or if --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 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 backup
options are given and SOURCE and DEST are the same name for an existing,
regular file.
```
在Linux中如何使用`cp`命令行工具进行文件拷贝?
在Linux中,`cp`是一个常用的命令行工具,用于复制文件和目录。基本的用法格式如下:
```bash
cp [选项] 源文件 目标文件
```
或者,如果你想复制一个目录及其内容:
```bash
cp [选项] -r 源目录 目标目录
```
这里的`-r`选项代表递归复制,用于复制目录及其下的所有文件和子目录。
例如:
- 将`file1.txt`复制到同一目录下命名为`file2.txt`:
```bash
cp file1.txt file2.txt
```
- 将`file1.txt`复制到另一个目录:
```bash
cp file1.txt /path/to/destination/
```
- 如果需要复制目录,可以使用`-r`(递归)选项:
```bash
cp -r source_directory/ /path/to/destination/
```
除了基本的复制功能外,`cp`命令还支持很多其他选项,比如:
- `-a` 或 `--archive`:归档模式,等同于 `-dR --preserve=all`
- `-f` 或 `--force`:强制复制,如果目标文件无法打开,则删除后再尝试
- `-i` 或 `--interactive`:在覆盖文件之前提示用户
- `-n` 或 `--no-clobber`:不覆盖已存在的文件
这些只是`cp`命令功能的一部分。使用时,可以在终端中输入`man cp`查看更多的帮助信息。
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