Hello and welcome bzzzzzdroid.
The file access control enforces who can access which archives. Take a look
at <https://en.wikipedia.org/wiki/File_system_permissions>. To share files,
what you need to do is to make sure that the users corresponding to your
other family members have permission access the files you intend to share.
There are several ways to do this. Here's an example:
==Instructions to use a directory for shared files==.
Execute the following commands as root. Lines that begin with “#” need
not be typed in the console. They're only to expalin the commands.
# Create shared directory and a group to be the owner for it:
useradd shared
mkdir /home/shared
chown shared:shared /home/shared
chmod 2770 /home/shared
# Now add all your family member users' to the group “shared”.
“FAMILY_MEMBER” is a variable. You should type do the following command
for all your family members, with their actual user names in place of
“FAMILY_MEMBER”.
adduser FAMILY_MEMBER shared
That's all, you can now use that directory to share files. Files created
there will belong to the group “shared” by default, but files moved from
elsewhere will keep their permissions by default, so you must change them
manually. You can use the following command to set the group appropriately
for all the files under “shared” (Recursively, so that sub-directories
are scanned as well):
chgrp -R shared /home/shared
Note that in BASH you can type “~shared” as a shorthand for
“/home/shared” since “~USERNAME” expands to the home directory of
that user (Which may not be under /home). Placing home directories under
“/home” is just a convention that you can chose to not to follow.
If you need more sophisticated solutions, read about UNIX file permissions,
or tell us what you need and somebody may be able to help (It's easy to do,
it just takes time to explain it).
