How to switch to a signed kernel in Ubuntu 18












0














I have multiple kernels installed in my pc. In which an unsigned version is active now. I want to switch back to an older signed version of the kernel.



When I run the following command: dpkg --list | grep linux-image



This is what its listing:




  1. ic linux-image-4.15.0-29-generic 4.15.0-29.31 Signed kernel image
    generic


  2. rc linux-image-4.15.0-39-generic 4.15.0-39.42 Signed kernel
    image generic


  3. ii linux-image-4.15.0-42-generic 4.15.0-42.45 Signed
    kernel image generic


  4. ii linux-image-4.15.0-43-generic 4.15.0-43.46
    Signed kernel image generic


  5. ii linux-image-generic 4.15.0.43.45
    Generic Linux kernel image

  6. ii
    linux-image-unsigned-4.19.5-041905-generic
    4.19.5-041905.201812031110 Linux kernel image for version 4.19.5 on 64 bit x86 SMP


The 6th kernel is active now. Which is not signed. And due to that facing lots of issues in updating and installing different packages.



I would like to switch to 4th kernel (Linux-image-4.15.0-43-generic 4.15.0-43.46) signed version.



How to do that? Also is it possible to remove all other kernels?










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  • Are you the one that installed that unsigned kernel (4.19)?
    – George Udosen
    Dec 31 '18 at 11:16










  • The has already been answered, watch at askubuntu.com/questions/621393/how-to-change-kernel-at-boot - Answer #2
    – Psychi
    Dec 31 '18 at 13:16
















0














I have multiple kernels installed in my pc. In which an unsigned version is active now. I want to switch back to an older signed version of the kernel.



When I run the following command: dpkg --list | grep linux-image



This is what its listing:




  1. ic linux-image-4.15.0-29-generic 4.15.0-29.31 Signed kernel image
    generic


  2. rc linux-image-4.15.0-39-generic 4.15.0-39.42 Signed kernel
    image generic


  3. ii linux-image-4.15.0-42-generic 4.15.0-42.45 Signed
    kernel image generic


  4. ii linux-image-4.15.0-43-generic 4.15.0-43.46
    Signed kernel image generic


  5. ii linux-image-generic 4.15.0.43.45
    Generic Linux kernel image

  6. ii
    linux-image-unsigned-4.19.5-041905-generic
    4.19.5-041905.201812031110 Linux kernel image for version 4.19.5 on 64 bit x86 SMP


The 6th kernel is active now. Which is not signed. And due to that facing lots of issues in updating and installing different packages.



I would like to switch to 4th kernel (Linux-image-4.15.0-43-generic 4.15.0-43.46) signed version.



How to do that? Also is it possible to remove all other kernels?










share|improve this question







New contributor




Piccaza De is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.




















  • Are you the one that installed that unsigned kernel (4.19)?
    – George Udosen
    Dec 31 '18 at 11:16










  • The has already been answered, watch at askubuntu.com/questions/621393/how-to-change-kernel-at-boot - Answer #2
    – Psychi
    Dec 31 '18 at 13:16














0












0








0







I have multiple kernels installed in my pc. In which an unsigned version is active now. I want to switch back to an older signed version of the kernel.



When I run the following command: dpkg --list | grep linux-image



This is what its listing:




  1. ic linux-image-4.15.0-29-generic 4.15.0-29.31 Signed kernel image
    generic


  2. rc linux-image-4.15.0-39-generic 4.15.0-39.42 Signed kernel
    image generic


  3. ii linux-image-4.15.0-42-generic 4.15.0-42.45 Signed
    kernel image generic


  4. ii linux-image-4.15.0-43-generic 4.15.0-43.46
    Signed kernel image generic


  5. ii linux-image-generic 4.15.0.43.45
    Generic Linux kernel image

  6. ii
    linux-image-unsigned-4.19.5-041905-generic
    4.19.5-041905.201812031110 Linux kernel image for version 4.19.5 on 64 bit x86 SMP


The 6th kernel is active now. Which is not signed. And due to that facing lots of issues in updating and installing different packages.



I would like to switch to 4th kernel (Linux-image-4.15.0-43-generic 4.15.0-43.46) signed version.



How to do that? Also is it possible to remove all other kernels?










share|improve this question







New contributor




Piccaza De is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











I have multiple kernels installed in my pc. In which an unsigned version is active now. I want to switch back to an older signed version of the kernel.



When I run the following command: dpkg --list | grep linux-image



This is what its listing:




  1. ic linux-image-4.15.0-29-generic 4.15.0-29.31 Signed kernel image
    generic


  2. rc linux-image-4.15.0-39-generic 4.15.0-39.42 Signed kernel
    image generic


  3. ii linux-image-4.15.0-42-generic 4.15.0-42.45 Signed
    kernel image generic


  4. ii linux-image-4.15.0-43-generic 4.15.0-43.46
    Signed kernel image generic


  5. ii linux-image-generic 4.15.0.43.45
    Generic Linux kernel image

  6. ii
    linux-image-unsigned-4.19.5-041905-generic
    4.19.5-041905.201812031110 Linux kernel image for version 4.19.5 on 64 bit x86 SMP


The 6th kernel is active now. Which is not signed. And due to that facing lots of issues in updating and installing different packages.



I would like to switch to 4th kernel (Linux-image-4.15.0-43-generic 4.15.0-43.46) signed version.



How to do that? Also is it possible to remove all other kernels?







18.04 kernel






share|improve this question







New contributor




Piccaza De is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question







New contributor




Piccaza De is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question






New contributor




Piccaza De is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









asked Dec 31 '18 at 10:28









Piccaza De

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New contributor




Piccaza De is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





Piccaza De is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Piccaza De is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












  • Are you the one that installed that unsigned kernel (4.19)?
    – George Udosen
    Dec 31 '18 at 11:16










  • The has already been answered, watch at askubuntu.com/questions/621393/how-to-change-kernel-at-boot - Answer #2
    – Psychi
    Dec 31 '18 at 13:16


















  • Are you the one that installed that unsigned kernel (4.19)?
    – George Udosen
    Dec 31 '18 at 11:16










  • The has already been answered, watch at askubuntu.com/questions/621393/how-to-change-kernel-at-boot - Answer #2
    – Psychi
    Dec 31 '18 at 13:16
















Are you the one that installed that unsigned kernel (4.19)?
– George Udosen
Dec 31 '18 at 11:16




Are you the one that installed that unsigned kernel (4.19)?
– George Udosen
Dec 31 '18 at 11:16












The has already been answered, watch at askubuntu.com/questions/621393/how-to-change-kernel-at-boot - Answer #2
– Psychi
Dec 31 '18 at 13:16




The has already been answered, watch at askubuntu.com/questions/621393/how-to-change-kernel-at-boot - Answer #2
– Psychi
Dec 31 '18 at 13:16










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