Backing up files and databases

The files below are what I use to back up my machines, it’s quick, simple, and effective – I’ve used this for years to recover a lot of data, including bare-metal on more than one occasion. The files listed toward the bottom (Summary, Backups, and Filelist) are generated and don’t need to exist beforehand.

/Backup/SiteWideBackup, executable (chmod a+x), this script is called by a cron job, it calls the other scripts that do the actual backups.

# make sure we're running as root
  if (( `id -u` != 0 )); then {
  echo "Sorry, must be root. Exiting..."; exit;
  } fi;
# First, make a backup of all of the MySQL Databases
# Finally, backup everything else;
# Run a backup for every .conf file in the /Backup directory
  cd /Backup
  for Script in *.conf
    do ./Snapshot $Script
# And send an e-mail with the list of Summaries;
cat /Backup/*/Summary

/Backup/MySQL/MySQLBackup, this backs up all of MySQL.

# This script is an attempt to make good backups of all of the databases within MySQL
# SRJ 2017-05-06
# First step, create a user solely for executing backups with;
# MariaDB [(none)]> GRANT LOCK TABLES, SELECT ON *.* TO 'MySQLBackup'@'localhost' IDENTIFIED BY 'eRCG57*2F&m(dP';
# Query OK, 0 rows affected (0.00 sec)
# MariaDB [(none)]> flush privileges;
# Query OK, 0 rows affected (0.00 sec)
# MariaDB [(none)]> quit;
# Bye
cd /Backup/MySQL
Date=$(date +"%Y-%m-%d-%H-%M")
Databases=$(${MySQL} --user=${User} -p${Pass} -e "SHOW DATABASES;" | grep -Ev "(Database|information_schema|performance_schema)")
# This creates a dated file for each db, these are text files that can be restored with mysql. 
for db in ${Databases} ; do
  ${MySQLDump} --force --opt --user=${User} -p${Pass} --databases "${db}" > ${Date}-"${db}".sql
# This last line deletes files older than two weeks - touching a file refreshes that clock.
find . -type f -name '*.sql' -atime +14 -exec rm -f {} \;

/Backup/01-Root.conf, this configuration file defines the backups for a partition. The rsync application can’t cross filesystem boundaries because that would break the incremental nature of this backup.

# =-=-=-=-=-=- File locations and variables.  -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
# The physical device where backups will exist.
# Where to mount the physical device.
# Where to write the backups
# What directory to back up, begins and ends in /
# Where to store the list of files and directories that we backed up.
# Summary file, a short list of actions taken by rsync to complete the backup.
# Stuff not to back up, there is always stuff to not back up!
# How many snapshot backups do we want to keep? Must be at least 2!

Snapshot, this is the script that backs up regular files and folders.

# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
# 2017-01-06-SRJ
# For information on how this script works, and what it does, read the 
# file README in this folder
# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
# suggestion from H. Milz: avoid accidental use of $PATH
unset PATH
# =-=-=-=-  System commands used by this script. -=-=-=-=-=-=-=-=
   ID=/usr/bin/id; ECHO=/bin/echo; MOUNT=/bin/mount; RM=/bin/rm; 
   MV=/bin/mv; CP=/bin/cp; TOUCH=/bin/touch; RSYNC=/usr/bin/rsync;
   DATE=/bin/date; WC=/usr/bin/wc; CAT=/bin/cat; TAIL=/usr/bin/tail;
   HEAD=/usr/bin/head; GREP=/bin/grep; CHMOD=/bin/chmod
# =-=-=-=-=-=-=- Make sure we're running as root -=-=-=-=-=-=-=-=-=
  if (( `$ID -u` != 0 )); then { 
  $ECHO "Sorry, must be root. Exiting..."; exit; 
  } fi;
# =-=-=-=-=-=-=-=-=-=- Read in the Variables -=-=-=-=-=-=-=-=-=-=-=
  if  [ ! -e $1 ] ; then {
  $ECHO "No viable config file given."; exit 0
  } fi;
# If we're here, there must be a config file to read, the line below
# reads the variables from that file into this bash environment.
  . $1 
# # # Update 2017-01-01 SRJ The line above sources the variables from
# # # the config file into this script - see /Backup/00-System.conf
# # # for more information.
# Make sure that the folder list exists, create it if needed;
  if [ ! -f $SNAPSHOT_RW/Backups ] ; then {
  $ECHO Nothing >> $SNAPSHOT_RW/Backups 
  } fi; 
# The full name of the oldest snapshot, first line in Backups
  [ $($CAT $SNAPSHOT_RW/Backups | $WC --lines) -ge $NUM_SNAP ] && \
  OLDEST=$($HEAD -1 $SNAPSHOT_RW/Backups) || OLDEST="Nothing"
# The full name of the last snapshot, last line in Backups
	LAST=$($TAIL -1 $SNAPSHOT_RW/Backups)
# The full name of the snapshot for this itteration. (2006-06-22-09-47)
# What time is it, in seconds past the epoch?
        StartTime=$($DATE +%s)
# Hour, minute, second function;
     local S=${1}     # this S is used only in this sub-routine
     ((h=S/3600))     # fills h with the integer of seconds / 3600
     ((m=S%3600/60))  # fills m with the integer of the modula from above / 60
     ((s=S%60))       # fills s with the integer of seconds / 60
     printf "%02d:%02d:%02d\n" $h $m $s  # print 2 digit zero padded numbers
# =-=-=-=-=-=-=-=-=- The script itself. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
# I stopped mounting and unmounting the filesystem, I now do this by 
# hand on an as-needed basis - these backup scripts are now on the 
# backup drives themselves.
# Attempt to remount the RO mount point as RW; else abort
#  $MOUNT -o remount,rw $MOUNT_DEVICE $MOUNT_DIR ;
#  if (( $? )); then {
#  $ECHO "Could not remount $MOUNT_DIR read-write"; exit; 
#  } fi;
# Creating the snapshot.
# Delete the oldest snapshot, if it exists:
  if [ -e ${OLDEST} ] ; then { $RM -rf ${OLDEST} ;} fi ;
# Delete the last filelist and create a new one with proper permissions.
  if [ -f $FILELIST ] ; then { $RM -f $FILELIST ;} fi ;
# Rsync from the system into the latest snapshot (notice that rsync 
# behaves like cp --remove-destination by default, so the destination is 
# unlinked first.  If it were not so, this would copy over the other 
# snapshot(s) too!
  RSARGS=" --archive --verbose --delete --delete-excluded --numeric-ids \
  --modify-window=1 --hard-links --one-file-system --acls --xattrs \
  --exclude-from="$EXCLUDES" --link-dest=$LAST/ "
# This is the line that does everything we're doing here...
# Add today's snapshot to the list, and remove the oldest;
  $GREP -v $OLDEST $SNAPSHOT_RW/Backups >>  $SNAPSHOT_RW/$$.tmp
  $MV -f $SNAPSHOT_RW/$$.tmp $SNAPSHOT_RW/Backups
  EndTime=$($DATE +%s) ; ElapsedTime=$(( $EndTime - $StartTime ))
  TimeWellSpent=$( _hms ${ElapsedTime})
# Write out the summary file.
  $ECHO $(( $($GREP -ve /$ $FILELIST | $WC --lines )-5)) \
  New files backed up. >> $SUMMARY
  $ECHO $OLDEST was removed and $CURRENT was created >> $SUMMARY
  $ECHO Elapsed time: $TimeWellSpent >> $SUMMARY
# And thats it for SNAP_DIR. Now remount the RW snapshot mountpoint as RO 
#  $MOUNT -o remount,ro $MOUNT_DEVICE $MOUNT_DIR ;
#  if (( $? )); then { 
#  $ECHO "Could not remount $MOUNT_DIR readonly"; exit; 
#  } fi;

/Backup/01-Root/Excludes, this file lists things we don’t want backing up.


/Backup/01-Root/Summary, is just the best bits of the Filelist, below.

sending incremental file list
created directory /Backup/01-Root/2019-08-14-02-02
718 New files backed up.
/Backup/01-Root/2019-08-04-02-02 was removed and /Backup/01-Root/2019-08-14-02-02 was created
Elapsed time: 00:14:56
sent 1,158,536,441 bytes  received 127,738 bytes  2,045,303.05 bytes/sec
total size is 773,557,672,398  speedup is 667.63

/Backups/01-Root/Backups, This is just a list of the backups that exist on the external drive.


/Backup/01-Root/Filelist, this file is moved to /Backup/01-Root/2019-08-14-02-02/Filelist after the rsync has finished.

sending incremental file list
created directory /Backup/01-Root/2019-08-14-02-02
sent 1,158,536,441 bytes  received 127,738 bytes  2,045,303.05 bytes/sec
total size is 773,557,672,398  speedup is 667.63