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In computing, cp is a command in various Unix and Unix-like operating systems for copying files and directories.The command has three principal modes of operation, expressed by the types of arguments presented to the program for copying a file to another file, one or more files to a directory, or for copying entire directories to another directory.
A directory is a logical section of a file system used to hold files. Directories may also contain other directories. The cd command can be used to change into a subdirectory, move back into the parent directory, move all the way back to the root directory or move to any given directory.
In computing, XCOPY is a command used on IBM PC DOS, MS-DOS, IBM OS/2, [1] Microsoft Windows, [2] FreeDOS, [3] ReactOS, [4] and related operating systems for copying multiple files or entire directory trees from one directory to another and for copying files across a network.
File copying is a fundamental operation for data storage. [citation needed] Most popular operating systems such as Windows, macOS and Linux as well as smartphone operating systems such as Android contain built-in file copying functions as well as command line (CLI) and graphical (GUI) interfaces to filing system copy and move functions. In some ...
As in Plan 9, operations traverse this stack top-down to resolve names, but unlike Plan 9, BSD union mounts are recursive, so that the contents of subdirectories appear merged in the union directory. Also unlike the Plan 9 version, all layers except the top are read-only: modifying files in the union causes their contents to first be copied ...
The root directory is always stored in inode number two, so that the file system code can find it at mount time. Subdirectories are implemented by storing the name of the subdirectory in the name field, and the inode number of the subdirectory in the inode field.
A directory can have at most 31998 subdirectories, because an inode can have at most 32,000 links (each direct subdirectory increases their parent folder inode link counter in the ".." reference). [16] On ext3, like for most current Linux filesystems, the system tool "fsck" should not be used while the filesystem is mounted for writing. [3]
copy letter.txt [destination] Files may be copied to device files (e.g. copy letter.txt lpt1 sends the file to the printer on lpt1. copy letter.txt con would output to stdout, like the type command. Note that copy page1.txt+page2.txt book.txt will concatenate the files and output them as book.txt. Which is just like the cat command). It can ...