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Top Forums Shell Programming and Scripting Bash variable within variable Post 302926809 by yifangt on Thursday 27th of November 2014 08:17:58 AM
Old 11-27-2014
Bash variable within variable

Hello,
Can I ask how to expand variable that contains another in bash? I need to loop variable within another one like this:
Code:
RD1=testgrp
RD2=testgroup
RD3=testgroupfile
RD4=tstgroup
...
RD40=try2013

DEST=/home/king/finaldir

for i in {1..40}; do 
mv ${RD${i}}  ${DEST}
done

I do not want use array as for i in testgrp testgroup testgroupfile tstgroup try2013 as the list is too long.
Thanks a lot!
 

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MV(1)								   User Commands							     MV(1)

NAME
mv - move (rename) files SYNOPSIS
mv [OPTION]... [-T] SOURCE DEST mv [OPTION]... SOURCE... DIRECTORY mv [OPTION]... -t DIRECTORY SOURCE... DESCRIPTION
Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY. Mandatory arguments to long options are mandatory for short options too. --backup[=CONTROL] make a backup of each existing destination file -b like --backup but does not accept an argument -f, --force do not prompt before overwriting -i, --interactive prompt before overwrite -n, --no-clobber do not overwrite an existing file If you specify more than one of -i, -f, -n, only the final one takes effect. --strip-trailing-slashes remove any trailing slashes from each SOURCE argument -S, --suffix=SUFFIX override the usual backup suffix -t, --target-directory=DIRECTORY move all SOURCE arguments into DIRECTORY -T, --no-target-directory treat DEST as a normal file -u, --update move only when the SOURCE file is newer than the destination file or when the destination file is missing -v, --verbose explain what is being done --help display this help and exit --version output version information and exit The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX. The version control method may be selected via the --backup option or through the VERSION_CONTROL environment variable. Here are the values: none, off never make backups (even if --backup is given) numbered, t make numbered backups existing, nil numbered if numbered backups exist, simple otherwise simple, never always make simple backups AUTHOR
Written by Mike Parker, David MacKenzie, and Jim Meyering. REPORTING BUGS
Report mv bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> COPYRIGHT
Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
rename(2) The full documentation for mv is maintained as a Texinfo manual. If the info and mv programs are properly installed at your site, the com- mand info coreutils 'mv invocation' should give you access to the complete manual. GNU coreutils 7.1 July 2010 MV(1)
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