backup(category4-postfix.html) - phpMan

btrfs-select-super (8) - overwrite primary superblock with a backup copy
db_hotbackup (1)     - Create "hot backup" or "hot failover" snapshots
doveadm-backup (1)   - Dovecot's one-way mailbox synchronization utility
mysqldump (1)        - a database backup program
mysqlhotcopy (1)     - a database backup program
vgcfgbackup (8)      - Backup volume group configuration(s)