Project: Laptop Backup
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Name	Laptop Backup
Initiator	fridgefire
Status	Working
Skills	Bash magic
Summary	A way to backup a laptop

Disclaimer

Do not blame me if something breaks.

Information

• First backup: Laptop -> Nas (Laptop runs the backup script)
• Second backup: Nas -> stack (External server runs the backup script)

Laptop to Nas backup

Information

• Laptop is Debian based.
• Backup to a NFS share at 192.168.12.75
• The NFS share is mounted at /mnt/nas/michiel/
• Laptop runs the backup script

Before running...

• Make sure the directory "backup" exist on the NFS share.
• Make sure screen is installed on your laptop.

Run the following command at the root of the NFS share.

printf "Welcome01" > .password

Backup Script

/opt/laptopbackup ("chmod +x /opt/laptopbackup" after creating file)

#!/bin/bash
echo "start backup"
: check if we can ping 192.168.12.75
ping -q -c5 192.168.12.75 > /dev/null
if [ $? -eq 0 ] ; then
    echo "ping is succeeded"
else
    echo "Can not ping to server"
    exit 0
fi
 
: Mount NFS share at /mnt/nas/michiel
mount 192.168.12.75:/shares/michiel /mnt/nas/michiel
 
: Check password in /mnt/nas/michiel/.password to make sure you are connected to the right NFS share.
if [ "$(cat "/mnt/nas/michiel/.password" | shasum -a 512)" = "eb6689158408aee35adb6b7ed148d5458073554439a184ad9b787d834c7eaa1df7103ddda2b31ff608de184d7d4f4d08f82bc86884a6ed0fa93e30d31e6bf055  -" ] ; then
  echo "password accepted"
else
  echo "Backup script: Wrong password at NFS share"
  exit 0
fi
 
 
: Rsync the whole system except some directories.
echo "Backup script: Rsync is running"
rsync -aAXH --delete --info=progress2 /home/michiel /mnt/nas/michiel/backup/laptop/home/michiel
echo "Backup script: Yeey, backup is finished"

To except some directories, replace rsync with the following command

rsync -aAXH --delete --info=progress2 --exclude={"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found","/home/*/.thumbnails/*","/home/*/.cache/*","/home/*/.local/share/Trash/*","/home/*/.gvfs","/home/*/Downloads"} / /mnt/nas/michiel/backup

Run the script

To run the script, use the following command.

sudo bash /opt/laptopbackup

Use sudo to make sure the permissions don't change. Also use bash instead op "./" or "sh" because otherwise you can get some bugs with the exclude parameters.

Nas to TransIP Stack backup

Information

• Server is Debian based.
• Backup to a webdav share at /mnt/stack/nas/michiel/backup/
• The NFS share is mounted at /mnt/nas/michiel/
• Server runs the backup script
• Server is a external server. Do not confuse my server and my nas. They are different :)

Before running...

• Make sure the directory "backup" exist on the NFS share.
• Make sure the TransIP Stack server is mounted at /mnt/stack
• Make sure the directory "/mnt/stack/nas/michiel/backup/" exist on the webdav share.
• Make sure screen is installed on your laptop.

Run the following command at the root of the webdav share.

printf "Welcome01" > .password

Backup Script

/opt/serverbackup ("chmod +x /opt/serverbackup" after creating file)

#!/bin/bash
while true
do
  echo "start backup"
  : check if we can ping 192.168.12.75
  ping -q -c5 192.168.12.75 > /dev/null
  if [ $? -eq 0 ] ; then
      echo "ping is succeeded"
  else
      echo "Can not ping to server"
      exit 0
  fi
 
  : Mount NFS share at /mnt/nas/michiel
  mount 192.168.12.75:/shares/michiel /mnt/nas/michiel
 
  : Check password in /mnt/nas/michiel/.password to make sure you are connected to the right NFS share.
  if [ "$(cat "/mnt/nas/michiel/.password" | shasum -a 512)" = "eb6689158408aee35adb6b7ed148d5458073554439a184ad9b787d834c7eaa1df7103ddda2b31ff608de184d7d4f4d08f82bc86884a6ed0fa93e30d31e6bf055  -" ] ; then
    echo "password accepted"
  else
    echo "Backup script: Wrong password at NFS share"
    exit 0
  fi
 
  : Mount webdav share at /mnt/stack
  mount /mnt/stack
 
  : Check password in /mnt/stack/.password to make sure you are connected to the right NFS share.
  if [ "$(cat "/mnt/stack/.password" | shasum -a 512)" = "eb6689158408aee35adb6b7ed148d5458073554439a184ad9b787d834c7eaa1df7103ddda2b31ff608de184d7d4f4d08f82bc86884a6ed0fa93e30d31e6bf055  -" ] ; then
    echo "password accepted"
  else
    echo "Backup script: Wrong password at Stack share"
    exit 0
  fi
 
  : Rsync the whole system except some directories.
  echo "Backup script: Rsync is running"
  rsync -aAXH --delete --info=progress2 /mnt/nas/michiel/backup/ /mnt/stack/nas/michiel/backup/
  echo "Backup script: Yeey, backup is finished"
done

Run the script

To run the script, use the following command.

sudo bash /opt/serverbackup

Use sudo to make sure the permissions don't change. Also use bash instead op "./" or "sh" because otherwise you can get some bugs with the exclude parameters.

Resources

• run a command once
• how to run a script on startup as soon as eth0 is up
• Full system backup
• Check if file does not exist
• strict mode
• sha512 hash in shell