You will find that the original contents of firstfile are gone, replaced by the contents of thirdfile. If you create a different file called thirdfile and then type the following command: cp thirdfile firstfile The cp command works by overwriting information. This results in two files with different names, each containing the same information. For example, to create an exact copy of the file called firstfile, you would type: cp firstfile secondfile To make a duplicate copy of a file, use the command cp. To examine the contents of a file you have just created, enter this at the % prompt: cat firstfile
(Hold down the Control key and type d.) On your screen, you will see: % cat > firstfile Terminate file entry by typing Control-d on a line by itself. To create a practice file (called firstfile) and enter one line of text in it, type the following at the % prompt: cat > firstfile Many people create files using a text editor, but you can use the command cat to create files without using/learning to use a text editor. Each of these is a unique file: myfile, Myfile, myFile, and MYFILE. It is best to avoid using these characters in file names: / \ " ' * | ! ? ~ $ Some characters have special meanings to Unix. You can divide a multi-word file name using either an underscore or a period (for example, chapter_one or chapter.two). Names may use almost any character (except a space). A directory may have the same name as one of the items it contains.įile and directory names may be up to 256 characters long. Within a directory, each item (that is, each file or directory) must have a unique name, but items with the same name may exist in more than one directory.
#Linux file copy log out windows#
Directories are analogous to Macintosh and Windows folders.Įach file and directory has a name. Directories may contain files and/or other directories. Unix makes no distinction among file types-a file may contain the text of a document, data for a program or the program itself.ĭirectories provide a way to organize files, allowing you to group related files together. What Are Unix Files and Directories?Ī file is a "container" for data. The instructions here apply to many other Unix machines however, you may notice different behavior if you are not using the ITS Login Service. It assumes you are using Unix on the ITS Login Service (). This document lists commands for creating, copying, renaming and removing Unix files and directories.
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