linux_ws2122/solutions/07-backups.md
Markus Pesch fed26c8bbd
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Aufgabe 1a

Datum Wochentag Backup-Methode Band

2020-11-02 Mon Ink Sohn-1 2020-11-03 Tue Ink Sohn-2 2020-11-04 Wed Ink Sohn-3 2020-11-05 Thur Ink Sohn-4 2020-11-06 Fri Diff Vater-1

2020-11-09 Mon Ink Sohn-1 2020-11-10 Tue Ink Sohn-2 2020-11-11 Wed Ink Sohn-3 2020-11-12 Thur Ink Sohn-4 2020-11-13 Fri Diff Vater-2

2020-11-16 Mon Ink Sohn-1 2020-11-17 Tue Ink Sohn-2 2020-11-18 Wed Ink Sohn-3 2020-11-19 Thur Ink Sohn-4 2020-11-20 Fri Diff Vater-3

2020-11-23 Mon Ink Sohn-1 2020-11-24 Tue Ink Sohn-2 2020-11-25 Wed Ink Sohn-3 2020-11-26 Thur Ink Sohn-4 2020-11-27 Fri Diff Vater-4

Aufgabe 1b

Datum Wochentag Backup-Methode Band 2020-11-07 Fri Diff Vater-1 2020-11-14 Fri Diff Vater-2 2020-11-21 Fri Diff Vater-3 2020-11-28 Fri Diff Vater-4 2020-11-30 Mon Voll Großvater-1

2020-12-04 Fri Diff Vater-1 2020-12-11 Fri Diff Vater-2 2020-12-18 Fri Diff Vater-3 2020-12-25 Fri Diff Vater-4 2020-12-31 Thur Voll Großvater-2

2021-01-01 Fri Diff Vater-1 2021-01-08 Fri Diff Vater-2 2021-01-15 Fri Diff Vater-3 2021-01-22 Fri Diff Vater-4 2021-01-29 Fri Voll Großvater-3

Praxisaufgabe

Teilaufgabe A

Drei Monate, zwei Wochen und einen Tag zurück vom 6. November 2020.

$ date --date '2020-11-06 - 3 month - 2 week - 1 day' '+%A, %d %B %Y'
Montag, 22 Juli 2020

Benötigte Backups Großvater-Backup 07. August 2020

Teilaufgabe B

28.10.2020

Benötigte Backups Großvater-Backup 02. Oktober 2020 Vater-Backup 09. 16. und 23. Oktober 2020 Sohn-Backup 26. 27. und 28. Oktober 2020