Dean S. Messing wrote:
Say backup_A was created first. If I do `du_true backup_A' I shd. see its size. Now I delete some files in "/dir_to_back_up" and create some other new files. Now I create "backup_B" with the above rsync command. I'd like for my mythical `du_true' to compute the incremental change in size from backup_A to backup_B.
du -s -c backup_A backup_B I use that to do exactly what you are want (hardlinked backups). The first result is the space occupied by A, the second result is the _additional_ space occupied by B. You can also go beyond two dirs. du -s -c backup_A backup_B backup_C backup_D But I find this one more useful: du -s -c backup_D backup_C backup_B backup_A because the result 10G backup_D 600M backup_C 300M backup_B 400M backup_A tells me that if I delete the oldest backup I free 400M, and I can free 700M if I delete the two oldest backups, etc. You can play with something like: du -s -c `ls | sort -r` Best regards. -- Roberto Ragusa mail at robertoragusa.it
