[B]Removing old kernels[/B] [U]Every kernel has four packages[/U] (kernel 3.5.0-15 is shown as an example); and [COLOR=#0000ff][B]these are the files (for old kernels) that you want to remove[/B][/COLOR]: [B]linux-headers-[/B]3.5.0-15 [I](header files)[/I] [B]linux-headers-[/B]3.5.0-15[B]-generic[/B] [I](additional headers depending on kernel type)[/I] [B]linux-image-[/B]3.5.0-15[B]-generic[/B] [I](kernel image)[/I] [I]<-- Important[/I] [B]linux-image-extra-[/B]3.5.0-15[B]-generic[/B] [I](extra image)[/I] Once you have installed a new kernel and booted into it to see that it's working properly, you can remove all packages related to older kernels - generally [B]around 220 MB[/B] for all packages together per kernel. However, you may want to keep the kernel version previous to the newest (that you are using now) so you have a backup option should something go wrong with the current (newest) kernel.
[B]In Muon (or Synaptic)[/B], you can enter in the search box: linux-image linux-headers Or, try this: Simply enter the kernel version number; for example, enter 3.13.0 and the headers and image files should come up. You can now uninstall all packages except those four for the latest kernel (and maybe the four files for the previous kernel, if you want a backup option). [U]Un-installing[/U] Some users here (e.g., vinny and I) recommend you use the "[B]purge[/B]" option (in Muon, for example), to remove these files.
Removing kernels
kubicle:
Actually, removing a kernel image package frees over 100Mb (it's not just the image, the package installs a good number of [B]firmware and modules in /lib/firmware/{kernel} and /lib/modules/{kernel})[/B]; if you add the headers, that's another 100 MB.
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Someone else said:
> Remove the linux-image-VERSION-generic packages and it will also remove the modules for you.
[U]Keep the last two kernels:[/U] (ronw) I let auto-remove remove old kernels, AFTER confirming the 'keep last 2 kernels' bit is working. In other words, I run an 'ls /boot' and check that what auto-remove is going to do is sane. [Important:] See [B]the '01autoremove-kernels' file in /etc/apt/apt.conf.d[/B] if you are interested in where the 'keep last 2' magic happens.
[B]Remove old kernels -- using apt-get [/B] Do the following if you wish to remove all older kernel versions that are not in use (except the previous one that you are not using. This is to make sure that if the current kernel version fails in some way, you have a way to go back to a previous state). Do the following: Code: sudo apt-get autoclean This will eliminate any old files (Including kernel versions) you may have. Note that if you have many old versions, it will take a while since it has to make sure that removing the kernel version has no issues. You can also do the following: Code: sudo apt-get clean Which will eliminate everything downloaded and stored in the cache folder of apt. Lastly you have: Code: sudo apt-get autoremove which would check for any unused packages and remove them if necessary. This is great for those libraries and dependency packages that are no longer needed by any app installed.
Does refind do a scan of the disks at boot time
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