Content deleted Content added
Citation bot (talk | contribs) Alter: template type. Removed Template redirect. | Use this bot. Report bugs. | Suggested by AManWithNoPlan | #UCB_toolbar |
adding Template:Computer files |
||
| (6 intermediate revisions by 4 users not shown) | |||
Line 1:
{{short description|Operation which creates a new digital file with contents identical to another}}
{{more citations needed|date=December 2009}}
{{use dmy dates|date=December 2021|cs1-dates=y}}
{{use list-defined references|date=January 2022}}
In digital [[computer file|file]] management, '''file copying''' is the creation of a new file which has the same content as an existing file. Computer [[operating system]]s include file copying methods to users, with operating systems with [[graphical user interface]]s ([[GUI]]s) often providing [[copy-and-paste]] or [[drag-and-drop]] methods of file copying. Operating systems may have specialized file copying APIs are usually able to tell the server to perform the copying locally, without sending file contents over the network, thus greatly improving performance.▼
▲In digital [[
== Description ==
Line 10 ⟶ 13:
== Use ==
All computer [[operating system]]s include file copying provisions in the user interface, like the command, "[[cp (Unix)|cp]]" in [[Unix]] and "[[
== {{anchor|NCOPY}}Implementation ==
Internally, however, while some systems have specialized [[application programming interface]]s ([[API]]s) for copying files (like CopyFile and CopyFileEx in [[Windows API]]), others (like Unix and DOS) fall back to simply reading the contents of the old file and writing it to the new file.
This makes little difference with local files (those on the computer's hard drive), but provides an interesting situation when both the source and target files are located on a remote [[file server]]. Operating systems with specialized file copying APIs are usually able to tell the server to perform the copying locally, without sending file contents over the network, thus greatly improving performance. Those systems that have no comparable APIs, however, have to read the file contents over the network, and then send them back again, over the network. Sometimes, remote file copying is performed with a specialized command, like "NCOPY" in DOS clients for [[Novell NetWare]]. The [[COPY (DOS command)|COPY]] command in some versions of [[DR-DOS]] since 1992
An even more complicated situation arises when one needs to copy files between two remote servers. The simple way is to read data from one server, and then to write the data to the second server.
Line 30 ⟶ 33:
== References ==
{{Reflist|refs=
<ref name="Caldera_1997_DOSSRC">{{
}}
Line 40 ⟶ 43:
== External links ==
* [https://www.gnu.org/software/emacs/manual/html_node/emacs/File-Shadowing.html Instructions on how to shadow files] for [[Emacs]]
{{Computer files}}
{{DEFAULTSORT:File Copying}}
| |||