The document discusses various methods of backing up and recovering Unix systems. It describes full and incremental backups, different backup levels in HP-UX, and common backup and recovery methods like fbackup, tar, cpio, dump/restore, and pax. Graph files can be used with fbackup to selectively backup included files and directories. The frecover command restores backups created with fbackup. Tar supports backups larger than 2GB and can create archive files. Cpio works with other commands to support multiple volume backups of large file systems. Dump copies data to tape and restore reconstructs file systems from dump backups. Pax provides portable archiving of directory hierarchies.