
It is a documented command whose usage is:
Usage for Backup by Name:ber][-f Device][-s Number][File ...]
restore -x[Mdqv] [-b Number] [-f Device] [-s Number] [File ...]
Extracts files by name.[-f Device] [-s Number] [File ...]
restore -T|-t [-qv] [-b Number] [-f Device] [-s Number]
Lists a table of contents or information about the backup.
restore -X Number [-Mdqv] [-b Number] [-f Device] [-s Number] [File ...]
Extracts beginning at a specified volume number.
Usage for Version 2 Backup by Inode:
restore -r[d] [-f Device] [File ...]ce] [-s Number]
Usage for Backup by Inode: systems.
restore -t[Bhqvy] [-b Number] [-f Device] [-s Number] [File ...]
Lists a ...