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Full Discussion: How to copy particular files from a multiple directories and paste in a new directory?
Top Forums UNIX for Beginners Questions & Answers How to copy particular files from a multiple directories and paste in a new directory? Post 303042506 by rbatte1 on Friday 27th of December 2019 08:07:27 AM
Old 12-27-2019
Hello dineshkumarsrk,

A few general comments first:-
  • Your for loop has an extra * which might be confusing when you read this later on.
  • It would be better to use longer variable names to make it clear and to reduce the risk of other things that might call this getting confused.
  • The use of backticks ` is deprecated and the way you do it is wasteful too. You add extra processes where the shell can do integer calculations for you.
  • It would be nice to indent your code for clarity
I have made a few tweaks based on these and your code looks like this:-
Code:
count=1
for source_file in */dnaG.fasta
do
   cp "${source_file}" "${count}"_"${source_file}" fastcancatg
   ((count=$count+1))
done

The cp command you have is saying "Copy the source file and the source file again, but with a prefix of the counter and an underscore writing both files to the target directory fastcancatg" which doesn't make sense. The source file with the prefix does not exist. Can I presume that you want to copy the source file to the target directory with a prefix? Perhaps try this instead:-
Code:
count=1
for source_file in */dnaG.fasta
do
   cp "${source_file}" "fastcancatg/${count}"_"${source_file}"
   ((count=$count+1))
done

Is that nearer to what you are after?


Kind regards,
Robin
 

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LEARN ABOUT OSX

rcp

RCP(1)							    BSD General Commands Manual 						    RCP(1)

NAME

     rcp -- remote file copy

SYNOPSIS

     rcp [-46p] source_file target_file
     rcp [-46pr] source_file ... target_directory

DESCRIPTION

     The rcp utility copies files between machines.  Each source_file, target_file, or target_directory argument is either a remote file name of
     the form ``ruser@rhost:path'', or a local file name (containing no ':' characters, or a '/' before any ':'s).

     The following options are available:

     -4      Use IPv4 addresses only.

     -6      Use IPv6 addresses only.

     -p      Cause rcp to attempt to preserve (duplicate) in its copies the modification times and modes of the source files, ignoring the
	     umask(2).	By default, the mode and owner of target_file are preserved if it already exists; otherwise the mode of the source file
	     modified by the umask(2) on the destination host is used.

     -r      If any of the source files are directories, rcp copies each subtree rooted at that name; in this case the destination must be a
	     directory.

     If path is not a full path name, it is interpreted relative to the login directory of the specified user ruser on rhost, or your current user
     name if no other remote user name is specified.  A path on a remote host may be quoted (using '', '"', or ''') so that the metacharacters
     are interpreted remotely.

     The rcp utility does not prompt for passwords; it performs remote execution via rsh(1), and requires the same authorization.

     The rcp utility handles third party copies, where neither source nor target files are on the current machine.

SEE ALSO

     cp(1), ftp(1), rlogin(1), rsh(1), hosts.equiv(5)

HISTORY

     The rcp command appeared in 4.2BSD.

BUGS

     Does not detect all cases where the target of a copy might be a file in cases where only a directory should be legal.

     Is confused by any output generated by commands in a .login, .profile, or .cshrc file on the remote host.

     The destination user and hostname may have to be specified as ``rhost.ruser'' when the destination machine is running the 4.2BSD version of
     rcp.

BSD
								 October 16, 2002							       BSD
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