Backup on CUBINlab

Introduction

All users accounts are backed up on kangaroo every night.
Users have direct access to older snapshots of their data on emu.
The scratch file system also provides snapshots.

Using ZFS Snapshots

Snaphots of user accounts are taken every hour and allow recovery of modified/deleted files at several points in time. No need to contact the administrator for each user to access the lost files.

joe has accidentally deleted the file notes.txt 3 hours ago but needs it now. Joe logs on emu and recovers the file from the snapshot taken 3 hours ago.

cd /home/joe/.zfs/snapshot
ls
cd hoursago.3
cp notes.txt /home/joe/
cd /home/joe

Note: the .zfs directory is hidden but available to all users.