tape backup

[talkstock888]

what is command for backup tape back up

[james_in_denver]

"tar" = "Tape Achiver" that is the command to actually write/read files to/from devices (and "tarball files").

"mt" = "magnetic tape", it's a utility to position, rewind, erase, skip forward, etc, tapes in tape drives.

[Yatima]

You can also use "dump"