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 Installing and Updating HP-UX 10.20, ACE and Hardware Extensions: HP 9000 Computers > Chapter 1 Before You Install

Backing Up Your Current System
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  • If you currently have no operating system or files on your system or if you have an OS and software that you can safely destroy, there is no need to perform a backup. You can now proceed with the installation and later set up a backup procedure.

  • If you already have an operating system and files on the system disk, you should make a full backup of the system before you start the install.

CAUTION:

  • If your system is running a 9.0x version of HP-UX, you may want to upgrade to HP-UX 10.20 (via 10.01), not install it. See the manual Upgrading from HP-UX 9.x to 10.x for detailed procedures for performing an upgrade.

  • You must be running 9.0 or later to upgrade to 10.20.

  • If you have a system running a pre-9.0x version of HP-UX, and you are willing to destroy all system customization in order to install 10.20, then cold-installing 10.20 may be the right answer.

    Remember that HP-UX 10.20 uses pathnames and file locations that are different from HP-UX 9.0x. Back up your current system, if any, in such a way as to separate "structural" (system) directories from "data" (user and application) directories. This will allow you to recover data directories onto 10.20 without compromising the 10.20 structure.

    You should not recover any pre-10.0 "structural" files onto the 10.20 system. Recover them only if the 10.20 install fails for some reason and you need to restore the pre-10.0 version of HP-UX.

For additional backup security for cold install, you can optionally do the following:

  • Make printouts of customized files and refer to them after the installation (for example, files such as .profile, /etc/netlinkrc, /etc/passwd).

  • Collect customized files in a directory (for example, /old). Use tar(1) to make a tape archive of the files in /old. After the installation, restore the files, editing them as desired.

You should also make copies of your "dot" files (for example, .profile and .mailrc). For further information about these files, see the manual, System Administration Tasks.



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