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I am using Debian and want to reinstall a backup of personal and configuration files (the entire /home folder of a user) on a new computer.

For some reason I cannot understand, every files of my entire backup has the same permissions : 777 / -rwxrwxrwx. This is way too permissive for some configuration files. For example, the first time I used ssh after reinstalling the backup, I had to do a "chmod 600 ~/.ssh/config" to be able to start ssh.

I really do not know why this happened. I backup with rsync -av with should preserve permissions and my external hard drive is using a ext4 filesystem.

Anyway, I have only this backup and no possibility to make another one (the computer died). I am looking for a way to set files and folder to their default settings (for example I guess .ssh/config file is 600) automatically.

Is there a way to achieve this automatically?

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1 Answer 1

Reset to default
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Here you go;

ORIG_DIR="/bla/bla" BKUP_DIR="/bla/dee" :~$ find $ORIG_DIR | while read aline; do perm=$(stat "$aline" | grep "Access: (" | sed 's/Access: (//;s/\/.*//'); chmod -v $perm "$BKUP_DIR/$aline"; done

I made an example;

:~$ mkdir ooh :~$ mkdir noo :~$ touch ooh/mog1 ooh/mog2 ooh/mog3 :~$ rsync -av ooh noo sending incremental file list ooh/ ooh/mog1 ooh/mog2 ooh/mog3 sent 245 bytes received 77 bytes 644.00 bytes/sec total size is 0 speedup is 0.00 :~$ ls -la noo/ooh/ total 32 drwxr-xr-x 2 mike mike 4096 Oct 28 23:09 . drwxr-xr-x 3 mike mike 4096 Oct 28 23:10 .. -rw-r--r-- 1 mike mike 0 Oct 28 23:09 mog1 -rw-r--r-- 1 mike mike 0 Oct 28 23:09 mog2 -rw-r--r-- 1 mike mike 0 Oct 28 23:09 mog3 :~$ chmod 700 ooh/mog1 :~$ chmod 600 ooh/mog2 :~$ chmod 555 ooh/mog3 :~$ find ooh ooh ooh/mog1 ooh/mog3 ooh/mog2 :~$ find ooh | while read aline; do perm=$(stat "$aline" | grep "Access: (" | sed 's/Access: (//;s/\/.*//'); chmod -v $perm "noo/$aline"; done mode of 'noo/ooh' retained as 0755 (rwxr-xr-x) mode of 'noo/ooh/mog1' changed from 0644 (rw-r--r--) to 0700 (rwx------) mode of 'noo/ooh/mog3' changed from 0644 (rw-r--r--) to 0555 (r-xr-xr-x) mode of 'noo/ooh/mog2' changed from 0644 (rw-r--r--) to 0600 (rw-------)
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