[Beowulf] User Support Access to User Files?

[Nicole Fontenot]

>
> Does anyone have a particularly polished way of offering access to user
files to non-root users for the purposes of job troubleshooting or the
like?

acl[0] would do the job nicely, just make sure the filesystem in question
is mounted with the acl option then, a user experiencing problems can give
the scientist account temporary permissions.
```shell
setfacl -R -m u:scientist:rwx ~/project_data
```
After the problem is fixed the user can revoke the permissions to keep the
home directory secure.
```shell
setfacl -x u:scientist: ~/project_data
```

Examples nearly copied from:
http://www.vanemery.com/Linux/ACL/linux-acl.html

0: https://wiki.archlinux.org/index.php/Access_Control_Lists
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