# it is necessary to be positioned in the directory from which you need to archive
# when running 'tar c.. ...'

# And also to be positioned in the directory into which you wish to extract
# when running 'tar x.. ...'

# A test of the contents of a tar can be done by running 'tar t.. ...'

tar cjf /mnt/m1-btrfs/disk-images/una/arch_`date +%F_%H-%M`.tar --exclude=lost+found .
tar cjf /mnt/m1-btrfs/disk-images/una/ku0904_`date +%F_%H-%M`.tar --exclude=lost+found .
tar cjf /mnt/m1-btrfs/disk-images/una/mint13_`date +%F_%H-%M`.tar --exclude=lost+found .
tar cjf /mnt/m1-btrfs/disk-images/una/mint17_`date +%F_%H-%M`.tar --exclude=lost+found .
tar cjf /mnt/m1-btrfs/disk-images/una/q4os_`date +%F_%H-%M`.tar --exclude=lost+found .