# dump -f [databackup name] [path or file name]
//example
# dump -f databackup /root/assignment1
# ls -l
// files show as
# root root databackup
//but when try to restore using restore command
restore -if databackup
//i is enter interactive mode
//so i press
# restore > ls
# restore > add
# restore > ls
# restore > extract
//then it say what somekind of volume error. how?