HP-UX System Administrator's Guide: Routine Management Tasks

Setting Up Virtual FTP Support
Virtual FTP support allows you to manage an FTP server for two or more separate
domains on the same machine.
Using virtual FTP, you can configure systems so that user1 connecting via ftp to
ftp.domain1.com gets one FTP banner and FTP directory, while user2 connecting
via ftp to ftp.domain2.com gets another banner and directory. You can create a
different set of configuration files ftpaccess, ftpconversions, ftphosts,
ftpusers, and ftpgroups for each virtual FTP site. (This occurs even though the
users are on the same machine and are using the same ports.
For detailed information on setting up virtual FTP support, see Chapter 2 of the Installing
and Administering Internet Services manual.
NOTE: Setting up a virtual FTP server requires IP address aliasing.
Backing Up Data
One of the most important goals of system administration is to protect the integrity of
the valuable data on a system. There are several aspects to this (for example, securing
the system against intruders, and protecting the system's data against deliberate or
accidental removal). Many things (for example device failure) can cause data loss, and
there are many tools to insure you can recover valuable data in the event of a loss of
the primary copy:
Data Backups By making copies of disk-based data onto external media that
you can store away from your system, you ensure that you can
recover the data should something happen to your primary
copies. Data can also be shipped over a network to a computer
at a different location. The important thing is to have copies of
all your important data somewhere other than on your system.
To protect against loss from flood, fire, or other disasters, you
should store at least one copy of all important data in a location
other than where your system resides.
The term data backup usually refers to the act of making an
offline copy of the data being protected.
Disk Mirroring By making multiple identical copies of all data as they are
written, you ensure that you can recover/access data (from a
mirror copy) in the event a device fails and the copy of that data
that is on it is destroyed.
RAIDs Redundant Arrays of Independent Disks are another form of
mirroring data.
Serviceguard HP sells a product called Serviceguard specifically designed to
protect not only disk based data, but also all aspects of your
122 Managing Systems