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[root@localhost backup_trials]# rsync -a --delete /etc/ backup.0/[root@localhost backup_trials]# lsbackup.0[root@localhost backup_trials]# du -h --max-depth=157M     ./backup.057M     .[root@localhost backup_trials]# cp -al backup.0 backup.1[root@localhost backup_trials]# du -h --max-depth=157M     ./backup.18.7M    ./backup.066M     .[root@localhost backup_trials]#