/etc/cron.daily/zz-backup2l is in backup2l 1.5-7.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | #!/bin/bash
# The following command invokes 'backup2l' with the default configuration
# file (/etc/backup2l.conf).
#
# (Re)move it or this entire script if you do not want automatic backups.
#
# Redirect its output if you do not want automatic e-mails after each backup.
! which backup2l > /dev/null || nice -n 19 backup2l -b
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