dump (program)

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Developer(s)AT&T Bell Laboratories
Initial releaseNovember 1973; 47 years ago (1973-11)
Operating systemUnix and Unix-like, MSX-DOS

The dump command is a program on Unix and Unix-like operating systems used to back up file systems. It operates on blocks, below filesystem abstractions such as files and directories. Dump can back up a file system to a tape or another disk. It is often used across a network by piping its output through bzip2 then SSH.

A dump utility first appeared in Version 6 AT&T UNIX.[1] A dump command is also part of ASCII's MSX-DOS2 Tools for MSX-DOS version 2.[2]


dump [-0123456789acLnSu] [-B records] [-b blocksize] [-C cachesize]
[-D dumpdates] [-d density] [-f file | -P pipecommand] [-h level]
[-s feet] [-T date] filesystem
$ dump -W | -w

See also[edit]


  1. ^ "dump.c". Bitsavers' Software Archive. Retrieved 8 March 2013.
  2. ^ MSX-DOS2 Tools User's Manual by ASCII Corporation

External links[edit]