hello everyone, I would like to ask what is the best practice for upgrading (updating all packages, ie. "dnf upgrade") in my Fedora 32 Workstation. The Gnome Software graphical application provides a way for me to do this, but it can also be achieved in the command line. Do these two methods achieve exactly the same results? I would also like to plainly ask if in any occasion it is necessary or advisable to perform a system reboot after doing an "dnf upgrade". I have noticed that when the upgrade is performed with Gnome Software, a reboot is always performed after the upgrade. thank you,
Anil Felipe Duggirala anilduggirala@fastmail.fm 于 2020年7月20日周一 下午12:22写道：
hello everyone, I would like to ask what is the best practice for upgrading (updating all packages, ie. "dnf upgrade") in my Fedora 32 Workstation. The Gnome Software graphical application provides a way for me to do this, but it can also be achieved in the command line. Do these two methods achieve exactly the same results?
If after a reboot, they have exact results.
I would also like to plainly ask if in any occasion it is necessary or advisable to perform a system reboot after doing an "dnf upgrade".
A file used by a running program is updated, if the program/service don't get restarted, the updates won't apply (and the space used by the old version won't get released until restart the program)
For example, when you update Firefox,the running Firefox will still be the older version until you close all Firefox window and restart Firefox.
I have noticed that when the upgrade is performed with Gnome Software, a reboot is always performed after the upgrade.
Yes, full reboot always confirm that everything that needs restart is correctly restarted, also those don't need to, personally, I don't like this design.
(I think) The better way is: https://dnf-plugins-core.readthedocs.io/en/latest/needs_restarting.html Or https://dnf-plugins-extras.readthedocs.io/en/latest/tracer.html
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On 7/19/20 9:21 PM, Anil Felipe Duggirala wrote:
I would like to ask what is the best practice for upgrading (updating all packages, ie. "dnf upgrade") in my Fedora 32 Workstation. The Gnome Software graphical application provides a way for me to do this, but it can also be achieved in the command line. Do these two methods achieve exactly the same results? I would also like to plainly ask if in any occasion it is necessary or advisable to perform a system reboot after doing an "dnf upgrade". I have noticed that when the upgrade is performed with Gnome Software, a reboot is always performed after the upgrade.
If you reboot after the dnf upgrade then the results are the same. Until then you will still be using old versions of libraries and old version of applications until you restart them. You can only use a new kernel by rebooting. Some applications like Firefox can get unhappy if you upgrade while they're running and can crash or have strange behaviour.
When you use Gnome Software to do the upgrade, the reboot is not after the upgrade, the reboot is required to *do* the upgrade. Only the downloading of packages is done, then when you reboot, it will do the upgrade, then reboot again into the updated system.
On Mon, 2020-07-20 at 13:33 +0800, Qiyu Yan wrote:
Yes, full reboot always confirm that everything that needs restart is correctly restarted, also those don't need to, personally, I don't like this design.
(I think) The better way is: https://dnf-plugins-core.readthedocs.io/en/latest/needs_restarting.html Or https://dnf-plugins-extras.readthedocs.io/en/latest/tracer.html
Agreed. That's also my preferred method, using the DNF tracer plugin so it's called automatically:
python3-dnf-plugin-tracer
It will tell you what programs you need to restart, or if you need to log out and in again. It will also tell you when you should reboot. It occasionally has a false positive, i.e. telling you to reboot when it doesn't seem to be necessary, but that's a minor issue.
poc
On Mon, 20 Jul 2020 at 04:44, Samuel Sieb samuel@sieb.net wrote:
On 7/19/20 9:21 PM, Anil Felipe Duggirala wrote:
I would like to ask what is the best practice for upgrading (updating
all packages, ie. "dnf upgrade") in my Fedora 32 Workstation. The Gnome Software graphical application provides a way for me to do this, but it can also be achieved in the command line. Do these two methods achieve exactly the same results? I would also like to plainly ask if in any occasion it is necessary or advisable to perform a system reboot after doing an "dnf upgrade". I have noticed that when the upgrade is performed with Gnome Software, a reboot is always performed after the upgrade.
If you reboot after the dnf upgrade then the results are the same. Until then you will still be using old versions of libraries and old version of applications until you restart them. You can only use a new kernel by rebooting. Some applications like Firefox can get unhappy if you upgrade while they're running and can crash or have strange behaviour.
Any application that makes extensive use of dynamically loaded libraries can potentially run into trouble if it loads a recently upgraded library while still using older versions of other libraries. The problems may not always be highly visible (e.g., silent corruption of a database) and if visible are likely to be interpreted as a "buggy" update and can generate nuisance bug reports and cause users to avoid updating.
When you use Gnome Software to do the upgrade, the reboot is not after the upgrade, the reboot is required to *do* the upgrade. Only the downloading of packages is done, then when you reboot, it will do the upgrade, then reboot again into the updated system.
This method is the most robust way to ensure there are no problems associated with updating. It not only minimizes the chance of users having problems with updates, it also reduces the workloads for the people who deal with bug reports.
Thanks everyone for your answers. This is very clear to me now. I guess I will go the gui way for now, sometimes one can even upgrade/update while shutting down the machine, which is useful. thanks again.
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Anil Felipe Duggirala -
George N. White III -
Patrick O'Callaghan -
Qiyu Yan -
Samuel Sieb