Linux dump Command | Rookie Tutorial

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Linux dump Command

Linux Command Manual

The Linux dump command is used to back up file systems.

dump is a backup utility program that can back up directories or entire file systems to a specified device, or back them up into a large file.

Syntax

dump  or dump 

Parameters:

• -0123456789 Backup level.
• -b Specify the block size in KB.
• -B Specify the number of blocks for the backup volume.
• -c Modify the default density and capacity of the backup tape.
• -d Set the tape density in BPI.
• -f Specify the backup device.
• -h When the backup level is equal to or greater than the specified level, files marked as "nodump" by the user will not be backed up.
• -n Notify all users in the "operator" group when the backup job requires administrator intervention.
• -s Length of the backup tape in feet.
• -T Specify the start date and time for the backup.
• -u After backup, record the backup file system, level, date, and time in /etc/dumpdates.
• -w Similar to -W, but only displays files that need to be backed up.
• -W Display files that need to be backed up and their last backup level, time, and date.

Examples

Back up files to tape

# dump -0 -u /dev/tape /home/

The "-0" parameter specifies the backup level, and "-u" requires that after backup, the corresponding information is stored in the file /etc/dumpdates for records.

Linux Command Manual