File permissions for Unix files can be managed from the
A Unix file or folder has a single individual owner plus a
single group owner.
Current permissions of the individual owner are displayed and can be modified by
Permissions for Unix file system files can be managed at https://ubfs.buffalo.edu/.
Groups are uniquely named entities for a particular system that can be used to specify file permissions. For example, at UB, there are institutional and AD groups.
Every user may be a member of one or more “groups”, including a “primary group”. Every file belongs to only one user and to only one group.
When a file is created in Unix, its owner is the person who created it. The default group is the primary group of the owner or the group of the directory in which it was created. Changing the group owner of a directory causes all files subsequently created in that directory to be created with the new group.
Checking Apply Recursively causes a change (add, replace or
remove) made to any folder to be made to all existing and future
files or subfolders in that folder. To change permissions that have
been inherited for a specific file or folder, use the replace or
remove option to change the undesired permissions and then set the
permissions on the target folder or file.
setuid (set user ID) and setgid (set group ID) are flags in Unix file systems that:
Using setgid on a directory causes new files and subdirectories to inherit the specified group or the setgid bit
Using setgid on a directory does not affect existing files and subdirectories.
Sticky bit is a flag for directories in Unix file systems that: