File and Resource Management
============================

This section covers some of the tools and technical knowledge that will
be key to maximising the usage of the foseres system.

..
 The default file permissions are then outlined, along with a description
 of changing these permissions to the desired setting. This leads on to
 the sharing of data between users and systems often a vital tool for
 project groups and collaboration.
 Finally we cover some guidelines for I/O and data archiving on foseres.



Checking your CPU-time allocation
---------------------------------



There are no CPU-time allocation on foseres.


Disk quotas
-----------

There are no Disk quotas on foseres.


File permissions and security
-----------------------------

List existing group.
How to share data among member of a group?

..
 By default, each user is a member of the group with the same name as
 [group\_code] in the ``/lustre/home`` directory path, e.g.
 ``x01``. This allows the user to share files with only members of that
 group by setting the appropriate group file access permissions. As on
 other UNIX or Linux systems, a user may also be a member of other
 groups. The list of groups that a user is part of can be determined by
 running the ``groups`` command.
 
 Default Unix file permissions can be specified by the ``umask`` command.
 The default umask value on foseres is 22, which provides "group" and
 "other" read permissions for all files created, and "group" and "other"
 read and execute permissions for all directories created. This is highly
 undesirable, as it allows everyone else on the system to access (but at
 least not modify or delete) every file you create. Thus it is strongly
 recommended that users change this default umask behaviour, by adding
 the command ``umask 077`` to their ``$HOME/.profile`` file. This umask
 setting only allows the user access to any file or directory created.
 The user can then selectively enable "group" and/or "other" access to
 particular files or directories if required.




Backup policies
---------------

There are currently no backups of data on foseres.