Siege Lion on the Way (iii) Linux (29)---Full backup tool: Dump and restore

One, the dump command:

This command can be backed up for the entire file system, or only for directories. You can also specify a different backup level ( -0~-9 a total of 10 levels).

Dump-w: Lists whether the partitions with the dump settings in/etc/fstab have been backed up.

Command format: Dump [-SUVJ] [-level] [-f backup file] data to be backed up

Parameter description:

-S: Lists only the amount of disk space needed to back up the data you want to back up.

-U: Log the time of this dump to the/etc/dumpdates file.

-V: Displays the file process of the dump.

-j: Added bzip2 support, data compression, the default bzip2 compression level is 2.

-level: Specifies the level, from -0~-9 a total of 10 levels.

-F: Similar to the-f parameter with tar.

1. Back up the complete file system with dump:

Dump-s/dev/sda1; <== View the disk capacity required for backup

Dump-0u-f/root/boot.dump/boot; <== backup, specifying a backup level of 0

Ll/root/boot.dump/etc/dumpdates; <== Verify that Dumpdates is updated

Dump-1u-f/root/boot.dump.1/boot; <== Create a new differential backup file.

2. Use dump to back up non-file systems, that is, a single directory method:

At this point, the-level 1-9 and-u are no longer applicable.

Dump-0j-f/root/etc.dump.bz2/etc;

Ii. Restore: Restoring commands

Since there is a backup, there will be a restore.

Restore-t [-F DumpFile] [-h] <== view dump file

Restore-c [-F dumpfile] [-D mount Point]; <== comparing dump with actual file

Restore-i [-F dumpfile]; <== into interactive mode

Restore-r [-F dumpfile]; <== restoring the entire file system

Parameter description: cannot be mixed

-T: Similar to the tar-t feature for viewing

-C: Compare the data in the dump with the actual file system

-I: Enter interactive mode, you can restore only some files

-R: Restore the entire file system

Other parameters:

-H: View information such as inode and label in full backup data

-F: Specify the dump file to be processed later

-D: Paired with-c

1. Use restore to view the contents of backup data after dump backup:

Restore-t-f/root/boot.dump;

2. Compare the differences and restore the entire file system:

Rsotre-c-f/root/boot.dump;

3, only restore the interactive mode of some files: I do not understand.