dnf-system-upgrade 命令

常用示例

说明

dnf system-upgrade is a DNF plugin used to perform major version upgrades of Fedora and other RPM-based distributions in an offline manner. Instead of upgrading the system while it runs, the plugin downloads every required package and then reboots into a dedicated systemd target where the transaction is applied with no user processes active. The workflow is three stages: download stages packages and verifies dependencies; reboot restarts the machine into the offline upgrade environment; on completion the system reboots again into the new release. clean discards the staged transaction if the upgrade is aborted. The plugin also exposes offline-upgrade and offline-distrosync subcommands which apply the same offline mechanism to ordinary updates and distro-syncs rather than to a release change.

参数

download

Download all packages needed for the upgrade and stage them for the next boot.

reboot

Trigger a reboot into the offline upgrade environment that performs the transaction.

clean

Remove cached packages and the saved transaction state.

status

Print the state of the current pending upgrade (no upgrade, download complete, etc).

log

List previous upgrade attempts; with --number _N_ show journal output for that boot (commonly -1 for the last).

--releasever=_VER_

Set the Fedora release version to upgrade to (e.g. 40, 41).

--allowerasing

Permit DNF to remove packages whose dependencies cannot be satisfied on the new release.

--best

Try to use the best available package versions, failing if not possible.

--nogpgcheck

Skip GPG signature verification (not recommended).