Linux Command Encyclopedia backup compression: Dump

Function Description: Back up the file system.

Grammar: dump&http://www.aliyun.com/zixun/aggregation/37954.html ">NBSP;" [-CNU] [-0123456789] [B < block size] [Number of B < blocks] [-D < density] [F < equipment name] [H < level] [-s < tape length] [-t < date] [Directory or file system] or dump [-WW]

Supplemental Note: Dump is a backup utility that backs up directories or entire file systems to a designated device, or backs up a large file.
Parameters：
-0123456789 levels of backup.
-b< Chunk Size > Specifies the size of the block in kilobytes.
Number of-b< blocks > Specifies the number of blocks for the backup volume.
-C modifies the density and capacity of the backup tape preset.
-d< density > Set the density of the tape. The unit is a BPI.
-f< Device name > Specify backup device.
-h< level > When the backup level equals or rains the specified level, the file marked "Nodump" by the user is not backed up.
-Ñ notifies users in all "operator" groups when a backup operation requires administrator intervention.
-s< tape length > Backup tape length, in feet.
-t< Date > Specifies the time and date when the backup starts.
-U after backup, record the backup file system, hierarchy, date and time in/etc/dumpdates.
-W is similar to-W, but only displays files that need to be backed up.
-W Displays the level, time, and date of the file that needs to be backed up and its last backup.