FYI: Didn't find a quick solution, so I did a find command executing ls and saving to a file, just to have it. The more I looked, things were not all "best" as programs and file systems changed over the years.
So, I'm largely done doing recursive chown, and find executing chmods. ---Paul. On Sun, May 28, 2023, 5:01 PM Dan Bacus <dbacu...@gmail.com> wrote: > Something else I'd like to add since the discussion moved this way a bit... > > If you use the cp -rp command for a recursive copy, the owner and group > are not preserved as they are set on the target side to the user who is > doing the copy. Also, mtime is set to "now" on the target side. > > However, if you want to preserve owner, group, perms, and mtime on a copy > you can do the following as root: > > cd /source > find . -depth -print | cpio -pdm /target > > 1) You must hand cpio the filenames to be copied using a relative path (.) > 2) For decades find did not have a default action of -print, so I still > put it there out of habit. > 3) You need -depth so that find starts at the bottom of the filesystem > tree and works its way back up. This makes it so that cpio will set mtimes > on the directories back to what they had in /source > 4) The -p option on cpio is pass-through. It does not build a > backup/archive file, it does a copy. The -d option is to make > sub-directories as needed, and -m maintains mtimes from source to target. > > I used this a lot when moving directories in / into their own new > filesystems after a system had been installed, say /opt, again as root: > > mount /dev/whatever /mnt > cd /opt > find . -depth -print | cpio -pdm /mnt > cd / > du -sk /opt /mnt <== /mnt should be slightly larger than > /opt due to the /mnt/lost+found directory that was not in /opt since it is > a part of / > rm -rf /opt/* <== remove everything inside of /opt to > free up space in the / filesystem, but leave /opt the directory for the > mount point > umount /mnt > mount /dev/whatever /opt > vi /etc/fstab <== or /etc/vfstab, or /etc/filesystem > depending upon OS; and add an entry to mount /opt at boot time. > > Dan > > On Sun, May 28, 2023 at 9:25 AM Paul Boniol <paul.bon...@gmail.com> wrote: > >> P.S. If you're willing to ignore matching mtime, there is a --size-only >> parameter. >> >> On Sun, May 28, 2023, 9:17 AM Paul Boniol <paul.bon...@gmail.com> wrote: >> >>> Funny you should mention rsync. That's what I'm using to copy recent >>> files. >>> >>> You have to run root (sudo) to so some things (like preserve >>> user/group/mtime). And in my case, to not get nagged about not being able >>> to change user/group it needs user map and group map parameters. (Shouldn't >>> be necessary going to ext4.) >>> >>> What I ended up choosing was >>> sudo rsync -avc --usermap=*:paul --groupmap=*:paul source-dir dest-dir >>> >>> Obviously do n for trial run till you're sure. >>> >>> The checksum option obviously takes quite a while for it to start, but >>> not choosing checksum, rsync wanted to copy every file, regardless. I'm >>> guessing some difference in mtime storage? Idk. The user and group mapping >>> were the last thing I set so possible it was something with that. >>> >>> ---Paul. >>> >>> On Sun, May 28, 2023, 7:56 AM Howard White <hwh...@vcch.com> wrote: >>> >>>> I have struggled with a similar problem. I have directories of mp3 >>>> files in two places: ntfs and ext4. With the demise of iROCK109, I >>>> need >>>> to resolve all of the ntfs files as the master copied to the ext4 (on >>>> my >>>> NAS) which I share in the house. rsync is messing with me over >>>> permissions. >>>> >>>> Howard >>>> >>>> On 5/28/23 03:21, Paul Boniol wrote: >>>> > Way back, I should have paid more attention... but I have like 3 TB >>>> of >>>> > video recordings backed up to an external (exfat) hard drive (should >>>> > have reformatted as ext4 first but I didn't think about it first). >>>> > >>>> > Now I'm preparing to do a fresh Linux install. And I'm wanting to >>>> > somehow backup the user/group/permissions for the directories and >>>> files. >>>> > >>>> > I can look and write them down as most would be the same. Just >>>> wondering >>>> > if there's some better way. >>>> > >>>> > ---Paul. >>>> > >>>> > -- >>>> > -- >>>> >>>> -- >> -- >> You received this message because you are subscribed to the Google Groups >> "NLUG" group. >> To post to this group, send email to nlug-talk@googlegroups.com >> To unsubscribe from this group, send email to >> nlug-talk+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/nlug-talk?hl=en >> >> --- >> You received this message because you are subscribed to the Google Groups >> "NLUG" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to nlug-talk+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/nlug-talk/CAL9PgS1x3tG5%3DwBYi0%2BAg88mVXVX3q9pzb-Czyqw0SATBxU7gQ%40mail.gmail.com >> <https://groups.google.com/d/msgid/nlug-talk/CAL9PgS1x3tG5%3DwBYi0%2BAg88mVXVX3q9pzb-Czyqw0SATBxU7gQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > -- > You received this message because you are subscribed to the Google Groups > "NLUG" group. > To post to this group, send email to nlug-talk@googlegroups.com > To unsubscribe from this group, send email to > nlug-talk+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/nlug-talk?hl=en > > --- > You received this message because you are subscribed to the Google Groups > "NLUG" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to nlug-talk+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/nlug-talk/CAEH-QC_jAFdk8bNDAi9i7hw6yChbgM_C5GSoCcg5BqDayuw5MQ%40mail.gmail.com > <https://groups.google.com/d/msgid/nlug-talk/CAEH-QC_jAFdk8bNDAi9i7hw6yChbgM_C5GSoCcg5BqDayuw5MQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- -- You received this message because you are subscribed to the Google Groups "NLUG" group. 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