DD Backup File System

1, the implementation of DD backup:

Using gzip compression:

DD If=/dev/hdb | gzip >/local/path/image.gz

Description:/dev/hdb is a hard consolidation disk. On different hard drives, may be/dev/sda or other. Before the backup, use the sudo fdisk-l command to see which file the hard disk is.

。 Image.gz is the backup image file.

2. Recovery of Backup:

If there are catastrophic consequences, such as hard disk damage, how to recover with DD?

A, find out the backup image.gz,

B, use command: gzip-dc/local/path/image.gz | DD Of=/dev/hdb

DD Backup File System