May 2017
Beginner
552 pages
28h 47m
English
Content preview from Linux Shell Scripting Cookbook - Third Edition
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How it works...
The find command generates a list of all files that have been modified since the creation of the full backup (/backup/full.tgz).
The date command generates a filename based on the Julian date. Thus, the first differential backup of the year will be day-1.tgz, the backup for January 2 will be day-2.tgz, and so on.
The differential archive will be larger each day as more and more files are changed from the initial full backup. When the differential archives grow too large, make a new full backup.