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Full Discussion: Comparing files by date/time
Top Forums Shell Programming and Scripting Comparing files by date/time Post 302933227 by jim mcnamara on Wednesday 28th of January 2015 10:50:40 PM
Old 01-28-2015
Use test -- the -nt comparison

assume you have a file tree /path and you have a text file that list files with multiple names:

Code:
# create file with names of duplicates
find /path -type f | xargs -l basename | awk '{arr[$0]++;next} END{for(i in arr){ if(arr[i]>1){print i} }}' > namefile
while read fname
do
   newest=""
  for file in $(find /path -name "$fname")
  do
      [ -z "$newest" ]  && newest="$file"  && continue
      [ $file -nt $newest ] && newest=$file
  done
  echo "$newest"
done < namefile > newest_files

I wrote to a separate file - you can verify duplicates. Otherwise pipe the awk directly into the while read loop and lose the < namefile
Last edited by jim mcnamara; 01-28-2015 at 11:59 PM..
 

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LEARN ABOUT CENTOS

reposync

reposync(1)															       reposync(1)

NAME

       reposync - synchronize yum repositories to a local directory

SYNOPSIS

       reposync [options]

DESCRIPTION

       reposync is used to synchronize a remote yum repository to a local directory, using yum to retrieve the packages.

OPTIONS

       -h, --help
	      Display a help message, and then quit.

       -c CONFIG, --config=CONFIG
	      Config file to use (defaults to /etc/yum.conf).

       -a ARCH, --arch=ARCH
	      Act as if running the specified arch (default: current arch, note: does not override $releasever. x86_64 is a superset for i*86.).

       --source
	      Also download .src.rpm files.

       -r REPOID, --repoid=REPOID
	      Specify repo ids to query, can be specified multiple times (default is all enabled).

       -t, --tempcache
	      Use a temp dir for storing/accessing yum-cache.

       -p DESTDIR, --download_path=DESTDIR
	      Path to download packages to: defaults to current directory.

       -g, --gpgcheck
	      Remove packages that fail GPG signature checking after downloading.  exit status is '1' if at least one package was removed.

       -u, --urls
	      Just list urls of what would be downloaded, don't download.

       -l, --plugins
	      Enable yum plugin support.

       -n, --newest-only
	      Download only newest packages per-repo.

       -q, --quiet
	      Output as little information as possible.

EXAMPLES

       Sync all packages from the 'updates' repo to the current directory:
	       reposync --repoid=updates

       Sync only the newest packages from the 'updates' repo to the current directory:
	       reposync -n --repoid=updates

       Sync packages from the 'updates' and 'extras' repos to the current directory:
	       reposync --repoid=updates --repoid=extras

       Sync all packages from the 'updates' repo to the repos directory:
	       reposync -p repos --repoid=updates

       Sync  all packages from the 'updates' repo to the repos directory excluding x86_64 arch. Edit /etc/yum.conf adding option exclude=*.x86_64.
       Then:
	      reposync -p repos --repoid=updates

FILES

       reposync uses the yum libraries for retrieving information and packages. If no configuration file is specified, the default yum	configura-
       tion will be used.

       /etc/yum.conf
       /etc/yum/repos.d/

SEE ALSO

       yum.conf (5)
       http://yum.baseurl.org/

AUTHORS

       See the Authors file included with this program.

BUGS

       There  are  of  course no bugs, but should you find any, you should first consult the FAQ section on http://yum.baseurl.org/wiki/Faq and if
       unsuccessful in finding a resolution contact the mailing list: yum-devel@lists.baseurl.org.  To file a bug  use	http://bugzilla.redhat.com
       for Fedora/RHEL/Centos related bugs and http://yum.baseurl.org/report for all other bugs.

								   27 April 2007						       reposync(1)
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