DIY Backup

diy-backup.md

DIY Backup

Usage

This goes in crontab:

  0  4   *   *   *   /<full path to>/bin/backup.sh

Notes / TODO

• Stop hardcoding to N backups with N rotation lines. This is dumb.
• Can we abuse logrotate(8) for this?
• report-backup.sh should just report the results of the last backup

backup.sh

#!/bin/sh

# for some background, read:

# http://www.mikerubel.org/computers/rsync_snapshots/
# ^^ especially section "4.4 Putting it all together"

# here's where this could go eventually:
# http://blog.interlinked.org/tutorials/rsync_time_machine.html
# DATE=`date "+%Y-%m-%dT%H:%M:%S"`

# ---------- VARIABLES ----------
# ~/snapshots is a symlink to /media/FreeAgent Drive/Archives/snapshots
BACKUP_PATH='/media/w5-backup'
LOGFILE='/home/tif/log/backup.log'


# ---------- LOG START OF BACKUP ----------
echo    ""                                              >> $LOGFILE
echo    "*********************************************" >> $LOGFILE
echo -n `date`                                          >> $LOGFILE
echo    ":"                                             >> $LOGFILE
echo    ""                                              >> $LOGFILE


# ---------- ROTATE ----------
rm -rf $BACKUP_PATH/backup.9
mv $BACKUP_PATH/backup.8 $BACKUP_PATH/backup.9
mv $BACKUP_PATH/backup.7 $BACKUP_PATH/backup.8
mv $BACKUP_PATH/backup.6 $BACKUP_PATH/backup.7
mv $BACKUP_PATH/backup.5 $BACKUP_PATH/backup.6
mv $BACKUP_PATH/backup.4 $BACKUP_PATH/backup.5
mv $BACKUP_PATH/backup.3 $BACKUP_PATH/backup.4
mv $BACKUP_PATH/backup.2 $BACKUP_PATH/backup.3
mv $BACKUP_PATH/backup.1 $BACKUP_PATH/backup.2
mv $BACKUP_PATH/backup.0 $BACKUP_PATH/backup.1


# ---------- DO THE BACKUP ----------
#  options:
#  -a                   archive (same as -rlptgoD):
#                         -r: recursive
#                          l: recreate symlinks
#                          p: preserve permissions
#                          t: preserve modification times
#                          g: set group (only if executor of rsync is root, ie it does nothing for me)
#                          o: set owner (same caveat as g above)
#                          D: recreate devices & special files (sockets and named pipes)
#  --delete             and remove deleted files
#  --link-dest          make hardlinks, so only duplicate changed files
#  --modify-window=1    properly detect unchanged files between ntfs and ext4
#                         see http://lukemcreynolds.com/content/rsync_from_linux_to_a_windows_partition_ext3_to_ntfs/

rsync -avx --delete-excluded --delete   \
      --exclude '.VirtualBox/*'         \
      --exclude 'VirtualBox\ VMs/*'     \
      --exclude '.cache/*'              \
      --exclude '.local/share/Trash/*'  \
      --link-dest=$BACKUP_PATH/backup.1 \
      /home/tif/  $BACKUP_PATH/backup.0/ >> $LOGFILE


# what i did for INITIAL BACKUP
# $BACKUP_PATH= ... as above
# mkdir $BACKUP_PATH/backup.3
# mkdir $BACKUP_PATH/backup.2
# mkdir $BACKUP_PATH/backup.1
# rsync -av /home/tif/  $BACKUP_PATH/backup.0/

report-backup.sh

FILE=/home/tif/log/backup.log
egrep '^\*+$' -A 1 -B 4 $FILE | grep -v '^--$'
tail -n 3 $FILE
echo ""