/usr/share/doc/simplesnap/examples/cron.monthly.zfsnap.serverhost is in simplesnap 1.0.3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | #!/bin/bash
# Create monthly snapshots, lasting 3 months on the serverhost
# (expiry time different on the backuphost)
# The serverhost daily job will expire them.
set -e
/usr/sbin/zfSnap -a 3m -p hostname-monthly- -r tank
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