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Manage Permissions for Sharing

Home Directories

Do not give your home directory group write permissions. This will break your ability to log into the cluster. If you need to share something in your home directory, either move it your project directory or ask for assistance.

Shared Group Directories

Upon request we can setup directories for sharing scripts or data across your research group. These directories can either have read-only permissions for the group (so no one accidentally modifies something) or read and write permissions for shared data directories.

If interested, email us at to request such a directory.

Share With Specific Users or Other Groups

It can be very useful to create shared directories that can be read and written by multiple users, or all members of a group.  The linux command setfacl is useful for this, but can be complicated to use.  Here are some simple scenarios.  We recommend that you create a shared directory somewhere in your project or scratch60 directories, rather than home.


Your ~/project and ~/scratch60 directories are actually symlinks (shortcuts) to elsewhere on the filesystem. Either run mydirectories or readlink - f dirname (replace dirname with the one you're interested in) to get their true paths. Give these true to people you are sharing with.

Share a Directory with All Members of a Group

To share a new directory called shared with group othergroup:

mkdir shared
setfacl -d -m g:othergroup:rwx shared

Share a Directory with a Particular Person

To share a new directory called shared with a person with netid aa111:

mkdir shared
setfacl -d -m u:aa111:rwx shared