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Full Discussion: Weird: unexpected result after piping a sort
Top Forums UNIX for Dummies Questions & Answers Weird: unexpected result after piping a sort Post 302762475 by stavros on Monday 28th of January 2013 02:15:21 PM
Old 01-28-2013
Weird: unexpected result after piping a sort
Hello,

And when you think you know the basics of something, UNIX in this case, something like what I will describe below comes along....

On a Linux system, a "typical" directory with some files. Say 20.
I do:

Code:
> ls | sort > mylisting

Now when I:
Code:
> vi mylisting

There is mylisting in the list of files in the directory.

I always though the pipe redirections were "linear".

Any explanations would be appreciated.

=S
Last edited by Scrutinizer; 01-28-2013 at 03:56 PM.. Reason: code tags
 

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LEARN ABOUT DEBIAN

linux-version

LINUX-VERSION(1)					      General Commands Manual						  LINUX-VERSION(1)

NAME

       linux-version - operate on Linux kernel version strings

SYNOPSIS

       linux-version compare VERSION1 OP VERSION2

       linux-version sort [--reverse] [VERSION1 VERSION2 ...]

       linux-version list [--paths]

DESCRIPTION

       linux-version operates on Linux kernel version strings as reported by uname -r and used in file and directory names.  These version strings
       do not follow the same rules as Debian package version strings and should not be compared as such or as arbitrary strings.

       compare VERSION1 OP VERSION2
	      Compare version strings, where OP is a binary operator. linux-version returns success (zero result) if the  specified  condition	is
	      satisfied, and failure (nonzero result) otherwise.  The valid operators are: lt le eq ne ge gt

       sort [--reverse] [VERSION1 VERSION2 ...]
	      Sort the given version strings and print them in order from lowest to highest.  If the --reverse option is used, print them in order
	      from highest to lowest.

	      If no version strings are given as arguments, the version strings will instead be read from standard input, one per line.  They  may
	      be suffixed by arbitrary text after a space, which will be included in the output.  This means that, for example:

	      linux-version list --paths | linux-version sort --reverse

	      will list the installed versions and corresponding paths in order from highest to lowest version.

       list [--paths]
	      List kernel versions installed in the customary location.  If the --paths option, show the corresponding path for each version.

AUTHOR

       linux-version and this manual page were written by Ben Hutchings as part of the Debian linux-base package.

								   30 March 2011						  LINUX-VERSION(1)
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