Difference between revisions of "Snapshots"
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(Created page with "Category:Storage =Purpose= Describe how home area snapshots can be used to recover lost files =Affected Storage= Only data stored in /home/$USERNAME are managed with snaps...") |
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=Method= | =Method= | ||
==Basics== | ==Basics== | ||
| − | * Change directory to / | + | * Change directory to /snapshot/$DAYOFWEEK |
| − | |||
** DAYOFWEEK is the day of the week that you want to recover from. This is the written day of the week in lowercase, i.e. wednesday, thursday, etc. | ** DAYOFWEEK is the day of the week that you want to recover from. This is the written day of the week in lowercase, i.e. wednesday, thursday, etc. | ||
* Copy file(s) as needed back to the main home directory. | * Copy file(s) as needed back to the main home directory. | ||
| + | |||
==Example== | ==Example== | ||
* Username: billybob | * Username: billybob | ||
Revision as of 13:37, 11 May 2018
Purpose
Describe how home area snapshots can be used to recover lost files
Affected Storage
Only data stored in /home/$USERNAME are managed with snapshots. If a file is lost in this filesystem, it can be recovered over the next week. If the file is on a different filesystem, that file cannot be recovered unless backups are being performed for that directory.
Method
Basics
- Change directory to /snapshot/$DAYOFWEEK
- DAYOFWEEK is the day of the week that you want to recover from. This is the written day of the week in lowercase, i.e. wednesday, thursday, etc.
- Copy file(s) as needed back to the main home directory.
Example
- Username: billybob
- Date: Wednesday
Let us say that that you have accidentally deleted a file in your home area called /home/billybob/bobFiles/important.txt. You know that file was on there yesterday, so you should be able to recover it.
[billybob@login1 ~]$ cd /home/billybob/bobFiles also_important.txt not_so_important.txt [billybob@login1 ~]$ ls important.txt also_important.txt not_so_important.txt [billybob@login1 ~]$ cd /snapvol/billybob_tuesday/billybob/bobFiles [billybob@login1 ~]$ ls important.txt also_important.txt not_so_important.txt [billybob@login1 ~]$ cp important.txt /home/billybob/bobFiles/important.txt [billybob@login1 ~]$ cd /home/billybob/bobFiles [billybob@login1 ~]$ ls important.txt also_important.txt not_so_important.txt