I maintain a file server. I need to backup files that have changed in a period of time.

First i compressed up everything to 4gb files and backed up to dvd. But 7z that I was using

7z a -t7z /home/user/myfiles051413_proj.7z /home/share/projects -v4000m -m0=bzip2 -mmt=4

does not seem to have a way to zip modified files in the last 60 days and i am unsure how to pass that to a command sorta like this. I do not want to have to compress the whole folder and backup what is already backed up! (waste of space)

tar seems to work good with this

find /home/share/projects -mtime -60

and piping it into a command works too but spaces give me issues. Here is the command I am attempting to get work. Finding all files modified in last 60 days. then compressing them into 4gb files.

find /home/share/projects/ -mtime -60 | xargs tar -cvML 4194304 -f /home/user/myfiles`date '+%d%m%Y'_proj.tar`

at the moment it will run for a while then only have one small file in it. it prints out numerous files on the screen!

I have been playing with -print0

find /home/samba/shares/projects -mtime -60 -type f -print0| xargs tar -cvML 4194304 -f /home/samba/shares/bkup/`date '+%d%m%Y'_proj.tar` -T - --null

i get a whole lot of tar: de: Cannot stat: No such file or directory

  • To get around problems with spaces use the -print0 option in find. (and match xargs with -0).
    – Hennes
    Jul 29, 2013 at 16:51
  • You're missing the -0 option to xargs. Also, if you want to add information, edit your question. This isn't a discussion forum. If you're going to add an answer, we expect it to provide a solution.
    – Daniel Beck
    Jul 29, 2013 at 19:57

1 Answer 1


you have bug in last script with -print0 .

  1. you use xargs . not good idea because for lot of files xargs run tar twice or more.
  2. you use for tar -T - option. rights, but what for in this situation is xargs ?

simply remove xargs because it is unneeded. this grab all files from stdin and put to tar as arguments at the end. then tar -T option gets nothing on his stdin .

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