Richard Owlett wrote: > My dual boots Squeeze and Wheezy. > I've created a partition whose function in life is to be essentially > a scratch pad for all groups/users of both. > How do I force all files to be written to that partition to be > readable AND writable to everybody? You are creating a multi-boot system to access the same files. I know of no better way than to synchronize the uid:gid of the users you care about across those different boot systems. If the user has the same uid:gid then they will all have sane access. This is the same problem as using NFS across multiple systems. You might look to see the NFS solutions. They all synchronize the uid and gid of the user. (No I am *not* suggesting you use a network. I am only saying that the problem of different systems needing synchronized user id numbers is the same problem.) This is also the same problem as using a chroot. The system in the chroot needs to have the same uid:gid numbers if accessing the same files such as from a bind mount. Same problem. For me I would simply brute force through it. Brute force and ignorance will always triumph over elegance and finesse. How many systems do you have? Two? How many users are we talking about? Three, four, five? Simply edit these files on both systems and make sure the users have the same uid:gid combinations on both of them. /etc/passwd /etc/group /etc/shadow /etc/gshadow It is a little bit messy to change but doable. Easier to have done from the beginning. But too late for that now. After changing those files then go back and change the home directories for those users. chown -R user1:user1 /home/user1 chown -R user2:user2 /home/user2 That should set things up. They will be able to log in the same as before but now will have different id numbers. If the users have the same id numbers in all of the shared systems then when the disk is mounted they will have the same permissions as on the other system. And then I would also set up group access for those users. This is the same as if they were on the the same single system. Put all of the different users that need to share files into a group. Make the directories that you want to share be group-owned by that group. Set the directory to be g+ws. David's previous references had good information on the details of setting up group access. You could probably make just group access work but there are still snags and pitfalls so I would do both the above synchronization of uid:gid numbers and also set up group access. Having both will do exactly what you want it to do. Bob
Attachment:
signature.asc
Description: Digital signature