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Full Discussion: Using variables to copy files with increasing numerical names.
Top Forums UNIX for Beginners Questions & Answers Using variables to copy files with increasing numerical names. Post 303044900 by Jovec on Sunday 8th of March 2020 10:04:10 AM
Old 03-08-2020
Using variables to copy files with increasing numerical names.
Hello, I have been learning Linux shell commands for about 4 months now. I am trying to write a simple shell script, but I have encountered an issue I do not understand the cause of.

Code:
#!/bin/bash

first=1
last=10

cp path/to/files/{$first..$last}.dat ./

When I run my script I get an error.
[user@x dir]$ ./myscript.sh
cp: cannot stat `path/to/file/{1..2}.dat': No such file or directory
[user@x dir]$

However when I run it without variables.
Code:
#!/bin/bash

cp path/to/files/{1..10}.dat ./

Running script without variables.
[user@x dir]$ ./myscript.sh

It copies the ten *.dat files from the path/to/files to the directory of myscript.sh. How can I get the script working with variables? Thanks in advance for any help given.
 

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LEARN ABOUT DEBIAN

makepercentrelay

MAKEPERCENTRELAY(8)					      Double Precision, Inc.					       MAKEPERCENTRELAY(8)

NAME

       makepercentrelay - Build a list of %-relayed domains

SYNOPSIS

       makepercentrelay

DESCRIPTION

       makepercentrelay reads /etc/courier/esmtppercentrelay.dir and creates /etc/courier/esmtppercentrelay.dat which is a binary database file.
       The files /etc/courier/esmtppercentrelay and /etc/courier/esmtppercentrelay.dat specify a list of "percent-hack" domains.
       /etc/courier/esmtppercentrelay is a plain text file, containing one domain per line. The Courier mail server loads the contents of
       /etc/courier/esmtppercentrelay into memory, so if you have a lot of domains, you will want to use the binary database file. The
       makepercentrelay command reads /etc/courier/esmtppercentrelay.dir, which can be either a plain text file itself, or a directory containing
       plain text files. All files in the subdirectory are concatenated, and the binary database file is created from the result.

       the Courier mail server can use both /etc/courier/esmtppercentrelay and /etc/courier/esmtppercentrelay.dat at the same time. Usually you
       would put a couple of your most frequent domains in /etc/courier/esmtppercentrelay, then put the rest in
       /etc/courier/esmtppercentrelay.dir, and use makepercentrelay to turn it into a database file.

       "percent-hack" domains are a list of domains for which the Courier mail server accepts mail via ESMTP addressed as
       "local%percent.hack.domain@local.domain", where "percent.hack.domain" is a domain found in /etc/courier/esmtppercentrelay or
       /etc/courier/esmtppercentrelay.dat, and "local.domain" is any domain found in /etc/courier/locals. The Courier mail server removes the
       local domain, and rewrites the address as "local@percent.hack.domain", then attempts to deliver it.

       The percent hack applies only to mail received via ESMTP. The Courier mail server does not check this list of domains if the message is
       received via any other way (such as by running /usr/bin/sendmail directly from the command line). "percent.hack.domain" would likely to be
       a domain that the Courier mail server knows how to handle via some other means. It might be an entry in /etc/courier/aliases, or an entry
       in /etc/courier/esmtproutes.

SEE ALSO

       esmtpd(8)[1], makealiases(8)[2].

AUTHOR

       Sam Varshavchik
	   Author

NOTES

	1. esmtpd(8)
	   [set $man.base.url.for.relative.links]/esmtpd.html

	2. makealiases(8)
	   [set $man.base.url.for.relative.links]/makealiases.html

Courier Mail Server						    08/30/2011						       MAKEPERCENTRELAY(8)
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