sudo mount /dev/xxxx -o remount-ro /mnt

mkdir /backup
cd /backup

tar --exclude='/backup' --exclude='/mnt/backup' --exclude='/mnt/mnt' -cvjpf mybackup.tar.bz2 /mnt

tar –exclude='./backup' –exclude='./mnt/backup' -cvjpf mybackup.tar.bz2 /mnt

Then you unpack with behavior permission

sudo tar -xvjpf mybackup.tar.bz2

Creating A Backup All Datebases And Restore

mysqldump -u root -p --all-databases > all_databases.sql
mysqldump -u root -p --all-databases < all_databases.sql

Creating A Backup Single Datebase And Restore

mysqldump -u root -p db_name > db_file.sql
mysqldump -u root -p db_name < db_file.sql

Split larger files into smaller parts? No problem!

Lets says I have an image and its too big (10MB). All I do is:

split --bytes=1M /path/to/image/image.jpg /path/to/image/prefixForNewImagePieces

and then to put it together I use cat:

cat prefixFiles* > newimage.jpg

rsync

backup from remote server 192.168.0.100 to local /mnt

mount /dev/sda1 /mnt/
rsync -aHxv root@192.168.0.100:/* /mnt --exclude=/dev --exclude=/proc --exclude=/sys --exclude=/tmp

/backup_`date +"%F"`.tar.bz2