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Top Forums UNIX for Dummies Questions & Answers Weird: unexpected result after piping a sort Post 302762493 by stavros on Monday 28th of January 2013 02:38:18 PM
Old 01-28-2013
@revri:
I am not sure I understant exactly you explanation but yes. it seems so.

Tested it on two installations as well. Same result for both.
Here they are:
1. Linux comet 2.6.32-41-generic #89-Ubuntu SMP Fri Apr 27 22:18:56 UTC 2012 x86_64 GNU/Linux
2. Linux testserv 2.6.18-6-686-bigmem #1 SMP Thu Nov 5 17:30:05 UTC 2009 i686 GNU/Linux

-S

---------- Post updated at 02:38 PM ---------- Previous update was at 02:33 PM ----------

OK here is a recipe for all to try.
I tried it on 2 systems. One a "pure" Ubuntu.
Check "before and after" to make sure that there are no "rogue" files present.

Code:
70      mkdir tmp
71      ll
72      cd tmp/
73      ll
74      for i in 1 2 3 ; do
        touch $i.file
        done
75      ll
76      ls | sort
77      ls | sort > mysort
78      vi mysort

 

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SORT(1) 							   User Commands							   SORT(1)

NAME
sort - sort lines of text files SYNOPSIS
sort [OPTION]... [FILE]... DESCRIPTION
Write sorted concatenation of all FILE(s) to standard output. Ordering options: Mandatory arguments to long options are mandatory for short options too. -b, --ignore-leading-blanks ignore leading blanks -d, --dictionary-order consider only blanks and alphanumeric characters -f, --ignore-case fold lower case to upper case characters -g, --general-numeric-sort compare according to general numerical value -i, --ignore-nonprinting consider only printable characters -M, --month-sort compare (unknown) < `JAN' < ... < `DEC' -n, --numeric-sort compare according to string numerical value -r, --reverse reverse the result of comparisons Other options: -c, --check check whether input is sorted; do not sort -k, --key=POS1[,POS2] start a key at POS1, end it at POS 2 (origin 1) -m, --merge merge already sorted files; do not sort -o, --output=FILE write result to FILE instead of standard output -s, --stable stabilize sort by disabling last-resort comparison -S, --buffer-size=SIZE use SIZE for main memory buffer -t, --field-separator=SEP use SEP instead of non- to whitespace transition -T, --temporary-directory=DIR use DIR for temporaries, not $TMPDIR or /tmp multiple options specify multiple directories -u, --unique with -c: check for strict ordering otherwise: output only the first of an equal run -z, --zero-terminated end lines with 0 byte, not newline --help display this help and exit --version output version information and exit POS is F[.C][OPTS], where F is the field number and C the character position in the field. OPTS is one or more single-letter ordering options, which override global ordering options for that key. If no key is given, use the entire line as the key. SIZE may be followed by the following multiplicative suffixes: % 1% of memory, b 1, K 1024 (default), and so on for M, G, T, P, E, Z, Y. With no FILE, or when FILE is -, read standard input. *** WARNING *** The locale specified by the environment affects sort order. Set LC_ALL=C to get the traditional sort order that uses native byte values. AUTHOR
Written by Mike Haertel and Paul Eggert. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for sort is maintained as a Texinfo manual. If the info and sort programs are properly installed at your site, the command info sort should give you access to the complete manual. sort (coreutils) 4.5.3 October 2002 SORT(1)
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