Dump (program)

The codice_1 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 codice_1 utility first appeared in Version 6 AT&T UNIX. A codice_1 command is also part of ASCII's "MSX-DOS2 Tools" for MSX-DOS version 2.
Usage.
 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