Check if all data it was well copy

[sed_faster]

I only need check if all content was copied correctly. I have two disks on a Ubuntu server and I want copy all data from disk 1 to disk 2. I am trying this command:

sudo rsync -Havcn /home/user/disk1/folder/* /home/user/disk2/folder_backup/ >> log.txt

UPDATE1:
What output can I expect if there are files that have not been copied between source and destination? Should I run this command (inverse)?:

sudo rsync -Havcn /home/user/disk2/folder_backup/ /home/user/disk1/folder/* >> log.txt

Thanks

[sudodus]

sudo rsync -Havcn /home/user/disk1/folder/ /home/user/disk2/folder_backup/ >> log.txt

The files listed in log.txt do not match (either are not copied or are different).

Please notice the special meaning of a trailing slash in the specification of the source in rsync

              rsync -avz foo:src/bar/ /data/tmp

       A  trailing slash on the source changes this behavior to avoid creating
       an additional directory level at the destination.  You can think  of  a
       trailing / on a source as meaning "copy the contents of this directory"
       as opposed to "copy the directory by  name",  but  in  both  cases  the
       attributes  of the containing directory are transferred to the contain‐
       ing directory on the destination.  In other words, each of the  follow‐
       ing  commands copies the files in the same way, including their setting
       of the attributes of /dest/foo:

              rsync -av /src/foo /dest
              rsync -av /src/foo/ /dest/foo

Edit: If you are not synchronizing, only copying, you need not worry about extra files in the target (files not matching corresponding files in the source).

[scorp123]

Oops. Don't mind me. I am not here.

[sed_faster]

Exist difference between folders. I guess the difference it is caused by the different users and groups I have created. Because the data (that I'm copying) came from an external NAS.
But right now I have two disks on my server and I want copy all data from disk2 to disk1. Which best program and method I should use?

Maybe If I change all users and groups relating to my files, standardizing everything, I will copy all data without problems. What do you think?

Thanks

[sudodus]

I think rsync is the best program. If you run it with elevated permissions (with sudo), it should work without modifying the permissions. I think it is risky to start modifying the users and groups, not so much for plain data files (pictures, documents etc), but definitely for configuration files.

So you should be able to run it according to my earlier tips, only remember to remove the option n ('dry run').

[TheFu]

Exist difference between folders. I guess the difference it is caused by the different users and groups I have created. Because the data (that I'm copying) came from an external NAS.
But right now I have two disks on my server and I want copy all data from disk2 to disk1. Which best program and method I should use?

Maybe If I change all users and groups relating to my files, standardizing everything, I will copy all data without problems. What do you think?

Thanks

It depends. Do you need those users and groups or not? If you do not, then change all the file and directories on the source to be owned by your normal userid. This assumes they are just data, not OS files or data or configs.

OTOH, if the users and groups are still necessary, then the solution, as stated by sudodus a few times, is to elevate the permissions using sudo for the rsync command. That will retain the existing owner and groups based on the values in the source.

[sed_faster]

I will try this command "sudo rsync -HSav --progress f1/ f2/" without parameter -n because I want copy all data, this is firstly synchronize.

[sed_faster]

It depends. Do you need those users and groups or not? If you do not, then change all the file and directories on the source to be owned by your normal userid. This assumes they are just data, not OS files or data or configs.

OTOH, if the users and groups are still necessary, then the solution, as stated by sudodus a few times, is to elevate the permissions using sudo for the rsync command. That will retain the existing owner and groups based on the values in the source.

Yes, it is only data, not OS files. I don't need all this users or groups. The system its is the same (I need study more about the Linux because I need learn how management data on this environment.

Do you suggest change first users/groups and only after run rsync?

[TheFu]

If only 1 userid is needed, then do this first:

sudo chown -R $USER:$USER /home/user/disk1/folder

Then you won't need sudo for the rsync, since that command above will change the owner to the current userid first.

If you are serious about learning Linux, then work through this book, http://linuxcommand.org/tlcl.php 1 chapter a week. Do all the exercises - even the "optional" ones.

If you want to kick-start, there's a free training website: https://linuxjourney.com/ Then go to that book and do the first 25-ish pages. And if you want to keep going, https://gitlab.com/sofreeus/Linux-Camp is beginning admin resource.

[ActionParsnip]

Could use a bash loop to shasum each file from source and destination to verify