LinuxMBR and Partition Table backup and recovery

LinuxMBR and Partition Table backup and recovery-Linux general technology-Linux technology and application information, the following is a detailed description. Back up MBR partitions
1. Use fdisk-l to determine the MBR location
2. Back up MBR
Dd if =/dev/sda1 of =/root/mbr bs = 512 count = 1
3. Restore MBR
Dd if =/root/mbr of =/dev/sda1 bs = 512 count = 1
4. Restore A partitioned table
Dd if =/root/mbr of =/dev/sda1 bs = 512 skip = 446 count = 66

Note: The mbr size is 512, so bs = 512 count = 1
Bs = 512 skip = 446 count = 66 is used to determine the location of the partition table in the backup file