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Re: Mac OS10 bug
From: |
Alfred M. Szmidt |
Subject: |
Re: Mac OS10 bug |
Date: |
Mon, 13 Apr 2009 04:36:30 -0400 |
say I want to sort on column 3, numericaly, reversed order:
sort -nu +2 -3 file > files
>From the Coreutils documentation, (coreutils) sort invocation:
| On older systems, `sort' supports an obsolete origin-zero syntax
| `+POS1 [-POS2]' for specifying sort keys. This obsolete behavior can
| be enabled or disabled with the `_POSIX2_VERSION' environment variable
| (*note Standards conformance::); it can also be enabled when
| `POSIXLY_CORRECT' is not set by using the obsolete syntax with `-POS2'
| present.
Also,
| `-k POS1[,POS2]'
| `--key=POS1[,POS2]'
| Specify a sort field that consists of the part of the line between
| POS1 and POS2 (or the end of the line, if POS2 is omitted),
| _inclusive_.
|
| Each POS has the form `F[.C][OPTS]', where F is the number of the
| field to use, and C is the number of the first character from the
| beginning of the field. Fields and character positions are
| numbered starting with 1; a character position of zero in POS2
| indicates the field's last character. If `.C' is omitted from
| POS1, it defaults to 1 (the beginning of the field); if omitted
| from POS2, it defaults to 0 (the end of the field). OPTS are
| ordering options, allowing individual keys to be sorted according
| to different rules; see below for details. Keys can span multiple
| fields.
|
| Example: To sort on the second field, use `--key=2,2' (`-k 2,2').
| See below for more examples.
Thus, sort -nurk 3,3 file
- Mac OS10 bug, Robert Schwenke, 2009/04/13
- Re: Mac OS10 bug,
Alfred M. Szmidt <=