Ubuntu 8.04: Upgrade or clean install?

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redhat-upgrade-tool-cli

REDHAT-UPGRADE-TOOL(8)					  redhat-upgrade-tool User Manual				    REDHAT-UPGRADE-TOOL(8)

NAME

       redhat-upgrade-tool - Red Hat Upgrade tool

SYNOPSIS

       redhat-upgrade-tool [OPTIONS] SOURCE

DESCRIPTION

       redhat-upgrade-tool is the Red Hat Upgrade tool.

       The redhat-upgrade-tool client runs on the system to be upgraded. It determines what packages are needed for upgrade and gathers them from
       the source(s) given. It also fetches and sets up the boot images needed to run the upgrade and sets up the system to perform the upgrade at
       next boot.

       The actual upgrade takes place when the system is rebooted, using the boot images set up by redhat-upgrade-tool. The upgrade initrd starts
       the existing system (mostly) as normal, lets it mount all the local filesystems, then starts the upgrade.

       When the upgrade finishes, it reboots the system into the newly-upgraded OS.

OPTIONS

   Optional arguments
       -h, --help
	   Show a help message and exit.

       -v, --verbose
	   Print more info.

       -d, --debug
	   Print lots of debugging info.

       --debuglog DEBUGLOG
	   Write debugging output to the given file. Defaults to /var/log/redhat-upgrade-tool.log.

       --reboot
	   Automatically reboot to start the upgrade when ready.

   SOURCE
       These options tell redhat-upgrade-tool where to look for the packages and boot images needed to run the upgrade. At least one of these
       options is required.

       --device [DEV]
	   Device or mountpoint of mounted install media. If DEV is omitted, redhat-upgrade-tool will scan all currently-mounted removable devices
	   (USB disks, optical media, etc.)

       --iso ISO
	   Installation image file.

       --network VERSION
	   Online repos matching VERSION (a number or "rawhide")

       Multiple sources may be used, if desired.

   Additional options for --network
       --enablerepo REPOID
	   Enable one or more repos (wildcards allowed).

       --disablerepo REPOID
	   Disable one or more repos (wildcards allowed).

       --addrepo REPOID=[@]URL
	   Add the repo at URL. Prefix URL with @ to indicate that the URL is a mirrorlist.

       --instrepo REPOID
	   Get upgrader boot images from the repo named REPOID. The repo must contain a valid .treeinfo file which points to the location of
	   usable kernel and upgrade images.

   Cleanup commands
       --resetbootloader
	   Remove any modifications made to bootloader configuration.

       --clean
	   Clean up everything written by redhat-upgrade-tool.

EXAMPLES

       redhat-upgrade-tool --network 7.0 --instrepo <repo URL>

       Upgrade to RHEL 7.0 by downloading all needed packages and data from the specified repository.

       redhat-upgrade-tool --device --network 7.0

       Upgrade to RHEL 7.0 using install media mounted somewhere on the system, fetching updates from the network if needed.

EXIT STATUS

       0
	   Success.

       1
	   Cancelled by user, failure writing files to disk, or other unknown error

       2
	   Failed to download/copy files from the given SOURCE

       3
	   RPM upgrade transaction test failed

BUGS

       The --iso image must be on a filesystem listed in /etc/fstab.

AUTHORS

       Will Woods <wwoods@redhat.com>

redhat-upgrade-tool						    11/08/2013						    REDHAT-UPGRADE-TOOL(8)

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