Reinstall an old kernel?

[circus78]

Hi, I am using:

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# lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 7.11 (wheezy)
Release:        7.11
Codename:       wheezy

I just upgraded kernel and other packages:

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Start-Date: 2017-06-20  15:06:26
Commandline: apt-get upgrade
Upgrade: libc-bin:amd64 (2.13-38+deb7u11, 2.13-38+deb7u12), linux-image-3.2.0-4-amd64:amd64 (3.2.88-1, 3.2.89-1), linux-headers-3.2.0-4-amd64:amd64 (3.2.88-1, 3.2.89-1), locales:amd64 (2.13-38+deb7u11, 2.13-38+deb7u12), linux-headers-3.2.0-4-common:amd64 (3.2.88-1, 3.2.89-1), multiarch-support:amd64 (2.13-38+deb7u11, 2.13-38+deb7u12), libc6-dev:amd64 (2.13-38+deb7u11, 2.13-38+deb7u12), linux-libc-dev:amd64 (3.2.88-1, 3.2.89-1), libc-dev-bin:amd64 (2.13-38+deb7u11, 2.13-38+deb7u12), libc6:amd64 (2.13-38+deb7u11, 2.13-38+deb7u12)
End-Date: 2017-06-20  15:07:11

After this upgrade, one application stops working.
I would like to boot previous kernel.. how can I do that?
It seems that at moment I have just one kernel:

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# dpkg -l |grep linux-image
ii  linux-image-3.2.0-4-amd64          3.2.89-1                                amd64        Linux 3.2 for 64-bit PCs
ii  linux-image-amd64                  3.2+46                                  amd64        Linux for 64-bit PCs (meta-package)

Thank you

[orythem27]

linux-image-3.2.0-4-amd64:amd64 (3.2.88-1, 3.2.89-1)
linux-headers-3.2.0-4-amd64:amd64 (3.2.88-1, 3.2.89-1)

Maybe you can download the old package (3.2.88-1) from http://snapshot.debian.org/package/linu ... 4_3.2.88-1 and use `dpkg -i` to manually downgrade.
After downgrading, you can `apt-mark hold` the package to avoid it from being upgraded again.

After this upgrade, one application stops working.

Or, if possible, you could describe the problem and see if we can work around it. Maybe it's not related to the kernel.

[circus78]

Thank you orythem27, I just installed previous kernel, and now application is working again.
It seems that other people, with more recent Debian version, got same problems..

https://community.ubnt.com/t5/UniFi-Wir ... -p/1967180



Thank you

[Bulkley]

circus78, for the future, always keep a spare kernel, one that you have used and meets your requirements. It makes it much easier when a new one causes problems and all you have to do is reboot into the old one. You will need to prevent the good kernel from being upgraded. See this for instructions on how to hold a package.

[circus78]

circus78, for the future, always keep a spare kernel, one that you have used and meets your requirements. It makes it much easier when a new one causes problems and all you have to do is reboot into the old one. You will need to prevent the good kernel from being upgraded. See this for instructions on how to hold a package.

Hi Bulkley, is there a way to keep last n kernel, like in CentOS?

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# package-cleanup --oldkernels --count=2

I would like to install every upgrade as usual, I just want to keep at least 1 or 2 old kernel, for safety.
Thankyou