why doesn't tar preserve file permissions? [closed]

Answer 1

Having a short look at the manpage clarifies your issue:

 -p, --preserve-permissions, --same-permissions
       extract information about file permissions (default for superuser)

But mind, that untaring your archive on some filesystems like FAT won't preserve permissions as they don't support it.

Also the numeric owner / access time preserve might be intersting to you:

 --numeric-owner
       always use numbers for user/group names

 --atime-preserve
       preserve access times on dumped files, either by restoring the
       times

Answer 2

Can you try:

tar -pcvzf xxx.tar.gz

p == preserve permissions
c == create archive
v == verbose (print names while making tar)
z == gzip
f == tar file name

Source

Answer 3

Use the p option, both when creating the tarball and when extracting it.