沙盒

为了分享同一目录的多用户写入权限，把该目录的写入权限授予一个分组是必要的。下面的例子把/var/www/html目录的写入权限授予"webmasters"分组。

sudo chgrp -R webmasters /var/www/html
sudo find /var/www/html -type d -exec chmod g=rwxs "{}" \;
sudo find /var/www/html -type f -exec chmod g=rw  "{}" \;

这些命令递归地设置组权限到/var/www/html下的所有文件和目录，以保证该组用户对该目录的读写权限。This has the effect of having the files and directories inherit their group and permission from their parrent. Many admins find this useful for allowing multiple users to edit files in a directory tree.

If access must be granted to more than one group per directory, enable Access Control Lists (ACLs).