Search results
Results from the WOW.Com Content Network
The reason for this is to distinguish between a file named '1' and stdout, i.e. cat file 2 >1 vs cat file 2 > & 1. In the first case, stderr is redirected to a file named ' 1 ' and in the second, stderr is redirected to stdout. Another useful capability is to redirect one standard file handle to another.
File pointers stdin, stdout, and stderr are also provided. Ken Thompson (designer and implementer of the original Unix operating system) modified sort in Version 5 Unix to accept "-" as representing standard input, which spread to other utilities and became a part of the operating system as a special file in Version 8 .
If the target is a non-existent section of an existing page, then the redirect will take the reader to the top of the target page. Chains of redirects are not followed. If title A redirects to B, and B is itself a redirect page, then a reader navigating to A will see the display of the redirect page B (as illustrated).
The main function accepts the name of a single page. It determines if the page is a redirect; if so it looks up the page, extracts the target, and returns the target name as text. Its usage is {{#invoke:redirect|main|page-name}}. If page-name does not exist or is not a redirect then page-name is returned.
Under Unix, devices are files too, so the normal type of file for the shell used for stdin, stdout and stderr is a tty device file. Another command-line interface allows a shell program to launch helper programs, either to launch documents or start a program.
From outside draftspace: This is a redirect from a page outside the draft-article namespace (draftspace) to a page in draftspace. This redirect page must be outside of draftspace. The draft is located at Draft:Template index/Redirect pages. You are welcome to improve the draft article while it is being considered for inclusion in article ...
Example usage of tee: The output of ls -l is redirected to tee which copies them to the file file.txt and to the pager less. The name tee comes from this scheme - it looks like the capital letter T. The tee command is normally used to split the output of a program so that it can be both displayed and saved in a file. The command can be used to ...
The command ls -l is executed as a process, the output (stdout) of which is piped to the input (stdin) of the process for grep key; and likewise for the process for less. Each process takes input from the previous process and produces output for the next process via standard streams .