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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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ipcheck

IPCHECK(8)						  System Administration Utilities						IPCHECK(8)

NAME

       ipcheck - dyndns.org client

DESCRIPTION

       Usage  : ipcheck.py [options] Username Password Hostnames or	  ipcheck.py [options] --acctfile acct_info_file

       Options: -a address     manually specify the address

       -r URL NAT router, use web IP detection

       -A text
	      scan syslog for an IP after text (Unix only)

       -F filename
	      guess the WAN IP from a firewall log

       -b     backup mx option ON (default OFF)

       -c     custom dns option (default dynamic)

       -d dir directory for data files (default current)

       -e script
	      execute script after a successful update

       -f     force update regardless of current state

       -g     NAT router, let dyndns guess your IP (do not use this in a cronjob, try -r)

       -h     print this help text

       --help print all available help text

       -i interface
	      interface for local address (default ppp0)

       -j     disable https

       -l     log debugging text to ipcheck.log file

       --syslog
	      log debugging text to syslog (Unix only)

       -m mxhost
	      mx host (default NOCHG)

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       -s     static dns option (default dynamic)

       -t     test run, do not send the update

       -v     verbose mode

       -w     wildcard mode ON (default OFF)

       --makedat
	      create the ipcheck.dat file by dns lookup

       --devices
	      print router options (Linksys, Netgear, etc)

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       text    : python ipcheck.py --help

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Debian GNU/Linux						   January 2012 							IPCHECK(8)
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