Re: Comments on upgrade steps from one version of Debian to another
On Sun, Aug 21, 2022 at 06:34:10PM -0400, John Boxall wrote:
[...]
> Chuck,
> I found the DebianUpgrade wiki page and all of the commands use "apt". When
> I have used "apt-get" it regularly pumps out a disclaimer that it doesn't
> have a good/reliable cli for scripting.
No, it's the other way around. Apt is the one doing this warning:
- apt-get is the "older" interface. Many things are missing or confusing
for newbies (why "apt-get install foo" but "apt-file search bar"?).
It has been embedded in many scripts (e.g. "apt-get ... | sed -e
's/foo/bar'),
thus changing its output format is out (those scripts would break)
- apt is the "newer" interface ("apt install foo", "apt install bar"). Its
authors don't want yet to commit to a fixed interface, thus the warning.
> I'm going to look at aptitude a little more.
Yet another interface. Its conflict resolution algorithm is way more
sophisticated.
Personally, I've perceived this sometimes as an advantage, sometimes as a
disadvantage.
Cheers
--
t
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Re: Comments on upgrade steps from one version of Debian to another
On 2022-08-20 19:27, Chuck Zmudzinski wrote: You can use apt, apt-get, or aptitude to run the commands that do most of the work, and in your script you chose apt for that task. I recall reading that they do not all use the same algorithm to determine which packages to upgrade and in what order, at each stage of the upgrade. I think I read somewhere that aptitude has the best algorithm, but apt-get is more suitable for a script. Chuck, I found the DebianUpgrade wiki page and all of the commands use "apt". When I have used "apt-get" it regularly pumps out a disclaimer that it doesn't have a good/reliable cli for scripting. I'm going to look at aptitude a little more. -- Regards, John Boxall
Re: Comments on upgrade steps from one version of Debian to another
On 2022-08-21 10:19, Andrew M.A. Cater wrote: apt-get autoremove I will definitely be adding this step. apt-get is definitely recommended for this at the moment, I think, and it > When I have seen other discussions about update/upgrade/etc, it was "apt" that people tended to recommend versus "apt-get". I was using apt-get in the original version, and switched to apt after reading those posts. I'll be creating several versions to see what works best. All the very best, as ever, Andy Cater Thanks and likewise! -- Regards, John Boxall
Re: Comments on upgrade steps from one version of Debian to another
On 2022-08-21 10:04, john doe wrote: The lines for the security mirror has changed on Bullseye. Thank you! I will be sure to add that check in. The script does not bail out on command failure, you might want to takecare of that if you automate this process by way of a script. That is all I can say on the cmds. Yes, there is a bail out at each step. "pipefail" was a good thing to learn about. If I may, for a fiew servers I would do it manually instead of blindly using a bunch of commands. I have one file/NFS server, a laptop and a desktop, so not a lot to worry aboutand at my leisure. If you need to automate this process, you should familiorize yourself with something like Ansible or in anycase a more robust solution. Thanks, I will look at ansible. -- Regards, John Boxall
Re: Comments on upgrade steps from one version of Debian to another
On Sun, Aug 21, 2022 at 04:04:02PM +0200, john doe wrote: > On 8/20/2022 9:48 PM, John Boxall wrote: > > I created an upgrade script based on something I found a few years ago > > that indicated the steps to follow to upgrade from one version of Debian > > to another (e.g. Buster 10 to Bullseye 11). As I am going to need to run > > this script at some point (I am still running Buster/10 on my systems), > > I thought I'd ask the Debian user brain trust to comment/critique the > > scripted steps. So here they are: > > > > > > ### Start > > > > > (I don't even have this part started yetdidn't know I needed it the > > last time I ran it) > > # > > The lines for the security mirror has changed on Bullseye. > > > > > ### End > > > > Thoughts/critique/criticism/flames/etc > > > > The script does not bail out on command failure, you might want to > takecare of that if you automate this process by way of a script. > That is all I can say on the cmds. > > If I may, for a fiew servers I would do it manually instead of blindly > using a bunch of commands. > > If you need to automate this process, you should familiorize yourself > with something like Ansible or in anycase a more robust solution. > > For upgrading Buster to Bullseye, I used: > > $ apt-get update > $ apt-get upgrade > $ apt-get full-upgrade > > > For better or worse, Debian let you upgrade or reinstall from scratch. > > -- > John Doe > For more than one version - since Debian doesn't allow you to skip versions well - here is a process that may single step you through two or more versions.. Read the release notes :) apt-get update ; apt-get dist-upgrade [on old version]. [Just to make absolutely sure you're completely up to date.] apt-get autoremove [To remove any cruft.] Change /etc/apt/sources.list stanzas to the next version [buster->bullseye] apt-get update ; apt-get upgrade [Safe upgrade - resolve all errors.] Reboot. apt-get dist-upgrade [Reboot - check to see new kernel comes up, for example] apt-get autoremove You _will_ need to modify this if there are major changes between versions if there's a breakage / if sources list changes. apt-get is definitely recommended for this at the moment, I think, and it should really be a process you check over manually because there's a lot of scope for things to go wrong. Downgrades / backgrades are NOT supported - so it's worth stepping through in single steps and checking output, IMHO. All the very best, as ever, Andy Cater
Re: Comments on upgrade steps from one version of Debian to another
On 8/20/2022 9:48 PM, John Boxall wrote: I created an upgrade script based on something I found a few years ago that indicated the steps to follow to upgrade from one version of Debian to another (e.g. Buster 10 to Bullseye 11). As I am going to need to run this script at some point (I am still running Buster/10 on my systems), I thought I'd ask the Debian user brain trust to comment/critique the scripted steps. So here they are: ### Start (I don't even have this part started yetdidn't know I needed it the last time I ran it) # The lines for the security mirror has changed on Bullseye. ### End Thoughts/critique/criticism/flames/etc The script does not bail out on command failure, you might want to takecare of that if you automate this process by way of a script. That is all I can say on the cmds. If I may, for a fiew servers I would do it manually instead of blindly using a bunch of commands. If you need to automate this process, you should familiorize yourself with something like Ansible or in anycase a more robust solution. For upgrading Buster to Bullseye, I used: $ apt-get update $ apt-get upgrade $ apt-get full-upgrade For better or worse, Debian let you upgrade or reinstall from scratch. -- John Doe
Re: Comments on upgrade steps from one version of Debian to another
On 2022-08-20 16:24, Charles Curley wrote: I would not do that as a script. You have a good recipe there, but I would run each step manually so I could correct errors, adjust configuration files, and otherwise shoot trouble as it appears. I did a lot of testing the first time I ran the script and feel that I can get away with it. I do have a complete log of all command output. You should probably run 'apt auto-remove' from time to time in there as needed. That is a good point. I'll probably through at least one in before updating the sources.list files. Maybe one at the end as well. -- Regards, John Boxall
Re: Comments on upgrade steps from one version of Debian to another
On 2022-08-20 19:27, Chuck Zmudzinski wrote: On 8/20/2022 3:48 PM, John Boxall wrote: I created an upgrade script based on something I found a few years ago that indicated the steps to follow to upgrade from one version of Debian to another (e.g. Buster 10 to Bullseye 11). As I am going to need to run this script at some point (I am still running Buster/10 on my systems), I thought I'd ask the Debian user brain trust to comment/critique the scripted steps. So here they are: ### Start apt -y install aptitude aptitude search \'~o\' apt update apt -y upgrade apt -y full-upgrade dpkg -C apt-mark showhold # Update sources.list # Update files in sources.list.d (I don't even have this part started yetdidn't know I needed it the last time I ran it) # apt-get check apt update apt list --upgradable apt-get check apt -y upgrade apt -y full-upgrade aptitude search \'~o\' ### End Thoughts/critique/criticism/flames/etc Hi John, here are my suggestions: You can use apt, apt-get, or aptitude to run the commands that do most of the work, and in your script you chose apt for that task. I recall reading that they do not all use the same algorithm to determine which packages to upgrade and in what order, at each stage of the upgrade. I think I read somewhere that aptitude has the best algorithm, but apt-get is more suitable for a script. I don't remember if there are advantages or disadvantages to using apt. So you should do a little research to try to find the most up-to-date information about the pros and cons of the different apt related tools. The Debian wiki has a page on that, I think. Also, you might want to make sure you record the upgrade session in a logfile so you can examine what the script actually did in case there are problems. And of course, backup or take a snapshot beforehand so you can restore the system back to a working state in case things get broken badly. HTH, Chuck Thanks Chuck, very good points. apt always tells you that it isn't reliable in a script, which I am aware of, however, I'll check the wiki. I "think" that applies to apt-get as well. I've never used aptitude for anything but the one command (it was one of those recommended on the web page I saw), but will investigate it further. I use "tee" extensively in the script and record all of the command output. As for a backup, I will be cloning the drive to a backup and performing a test update to that drive first. My only real concern is the non-Debian software that I've installed over the years. We'll see how it goes. -- Regards, John Boxall
Re: Comments on upgrade steps from one version of Debian to another
On 8/20/2022 3:48 PM, John Boxall wrote: > I created an upgrade script based on something I found a few years ago > that indicated the steps to follow to upgrade from one version of Debian > to another (e.g. Buster 10 to Bullseye 11). As I am going to need to run > this script at some point (I am still running Buster/10 on my systems), > I thought I'd ask the Debian user brain trust to comment/critique the > scripted steps. So here they are: > > > ### Start > apt -y install aptitude > aptitude search \'~o\' > apt update > apt -y upgrade > apt -y full-upgrade > dpkg -C > apt-mark showhold > # > Update sources.list > # > Update files in sources.list.d > (I don't even have this part started yetdidn't know I needed it the > last time I ran it) > # > apt-get check > apt update > apt list --upgradable > apt-get check > apt -y upgrade > apt -y full-upgrade > aptitude search \'~o\' > ### End > > Thoughts/critique/criticism/flames/etc > Hi John, here are my suggestions: You can use apt, apt-get, or aptitude to run the commands that do most of the work, and in your script you chose apt for that task. I recall reading that they do not all use the same algorithm to determine which packages to upgrade and in what order, at each stage of the upgrade. I think I read somewhere that aptitude has the best algorithm, but apt-get is more suitable for a script. I don't remember if there are advantages or disadvantages to using apt. So you should do a little research to try to find the most up-to-date information about the pros and cons of the different apt related tools. The Debian wiki has a page on that, I think. Also, you might want to make sure you record the upgrade session in a logfile so you can examine what the script actually did in case there are problems. And of course, backup or take a snapshot beforehand so you can restore the system back to a working state in case things get broken badly. HTH, Chuck
Re: Comments on upgrade steps from one version of Debian to another
On Sat, 20 Aug 2022 15:48:53 -0400 John Boxall wrote: > Thoughts/critique/criticism/flames/etc I would not do that as a script. You have a good recipe there, but I would run each step manually so I could correct errors, adjust configuration files, and otherwise shoot trouble as it appears. You should probably run 'apt auto-remove' from time to time in there as needed. -- Does anybody read signatures any more? https://charlescurley.com https://charlescurley.com/blog/
Comments on upgrade steps from one version of Debian to another
I created an upgrade script based on something I found a few years ago that indicated the steps to follow to upgrade from one version of Debian to another (e.g. Buster 10 to Bullseye 11). As I am going to need to run this script at some point (I am still running Buster/10 on my systems), I thought I'd ask the Debian user brain trust to comment/critique the scripted steps. So here they are: ### Start apt -y install aptitude aptitude search \'~o\' apt update apt -y upgrade apt -y full-upgrade dpkg -C apt-mark showhold # Update sources.list # Update files in sources.list.d (I don't even have this part started yetdidn't know I needed it the last time I ran it) # apt-get check apt update apt list --upgradable apt-get check apt -y upgrade apt -y full-upgrade aptitude search \'~o\' ### End Thoughts/critique/criticism/flames/etc -- Regards, John Boxall
