一个命令seq分享下

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　　$ rpm -qif `which seq`

　　Name : coreutils Relocations: (not relocatable)

　　Version : 5.2.1 Vendor: Red Hat, Inc.

　　Release : 31.2 Build Date: Mon 20 Jun 2005 07:45:58 PM CST Install Date: Fri 06 Jul 2007

　　Install Date: Fri 06 Jul 2007 03:30:09 PM CST Build Host: crowe.devel.redhat.com

　　Group : System Environment/Base Source RPM: coreutils-5.2.1-31.2.src.rpm

　　Size : 7636028 License: GPL

　　Signature : DSA/SHA1, Thu 14 Jul 2005 02:52:44 AM CST, Key ID 219180cddb42a60e

　　Packager : Red Hat, Inc.

　　URL : ftp://alpha.gnu.org/gnu/coreutils/

　　Summary : The GNU core utilities: a set of tools commonly used in shell scripts

　　Description :

　　These are the GNU core utilities. This package is the combination of

　　the old GNU fileutils, sh-utils, and textutils packages.

　　$ man seq

　　SEQ(1) User Commands

　　NAME

　　seq - print a sequence of numbers

　　SYNOPSIS

　　seq [OPTION]... LAST

　　seq [OPTION]... FIRST LAST

　　seq [OPTION]... FIRST INCREMENT LAST

　　DESCRIPTION

　　Print numbers from FIRST to LAST, in steps of INCREMENT.

　　-f, --format=FORMAT

　　use printf style. floating-point FORMAT (default: %g)

　　-s, --separator=STRING

　　use STRING to separate numbers (default: \n)

　　-w, --equal-width

　　equalize width by padding with leading zeroes

　　--help display this help and exit

　　--version

　　output version information and exit

　　If FIRST or INCREMENT is omitted, it defaults to 1. That is, an omitted INCREMENT defaults to 1 even when LAST

　　is smaller than FIRST. FIRST, INCREMENT, and LAST are interpreted as floating point values. INCREMENT is usually

　　positive if FIRST is smaller than LAST, and INCREMENT is usually negative if FIRST is greater than LAST. When given,

　　the FORMAT argument must contain exactly one of the printf-style, floating point output formats %e, %f, %g

　　$ cat conn.sql

　　#! /bin/bash

　　for ((i=1; i<=10; ++i))

　　do

　　sqlplus scott/xxxx @aa.sql &

　　done

　　--这样那个可以写成

　　for i in $(seq 10); do

　　sqlplus scott/xxxx @aa.sql &

　　done
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