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nflenz is correct--you can share /home, but all users must have the same UID. The only issue you may run into is compatibility issues between different versions of software and their configuration files. If you're running, for example, the most recent Gnome in on distro and an older Gnome in another, your desktop may not load properly in one of the two.
I have used the same /home partition for all Linux for years, instead of trying to sync things by using the same user name I just created a different user name in each Linux so their settings were not altered or affected by the default desktop environments of the differing Linux distributions. You can expect issues to arise using the same user name accessing the same /home directory when different distributions use different versions of the same desktop environment, never mind a different desktop environment.
Over time I found it is better to have a shared data partition, this way user settings don't get altered by other distributions as the /home stays within /. And all systems can use/abuse/add/delete my data without rendering an OS un-bootable as can happen when sharing the same user's account from more than one system.
3 flavors of Windows NTFS
3 flavors of Linux
Mac OS X Leopard
All can read/write to the data partition using ntfs-3g where it is not their default file system as the shared data partition is the most robust file system...NTFS.
Last edited by Junior Hacker; 12-09-2008 at 04:03 PM.
Can I use the same /boot partition or does each distro need its own /boot? I have googled grub and multi booting but can not find a clear answer on how this is done. I am running multiple linux distros.
Gentoo or LFS
yes /boot can be set to common for ubuntu just dump the kernel initrd in the /boot of your common boot partition( i have done this and it was working fine with rhel + ubuntu ). for slackware and gentoo i havent used them.
I would be cautious when sharing /home between distros. The hidden files can contain app-version specific data which might not work in one distro. You might not want DistA to overwrite your .fspot or .gimp because DistA uses another format or whatever, can get messy. Create a /shared and drag files in.
I have enough problems upgrading a distro from major to major then reusing /home never mind a multiple-distro setup.