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basic snapshots

“cp -al” creates links instead of copying
rsync unlinks before overwriting
- note that cp needs --remove-destination flag to do this

Basic Snapshot script:

rm -rf backup.3
mv backup.2 backup.3
mv backup.1 backup.2
cp -al backup.0 backup.1
rsync -a --delete source/ backup.0/

Even though these backups are incremental, each backup directory has a full copy!

Notes: