I executed the following command in shell:

sudo yum list kernel-core
Loaded plugins: langpacks
Installed Packages
kernel-core.x86_64         3.17.4-301.fc21          @koji-override-0/$releasever
kernel-core.x86_64         3.18.5-201.fc21          @updates         

The kernel-core.x86_64 part of version 3.17 is underlined.

Could anyone help me understand what this means? I have already updated all packages using sudo yum update and am wondering why I still have the earlier version of kernel-core.

  • 1
    by default, the latest three kernel versions are kept in fedora in bootable state. so that if you get a non-booting kernel after updating, you can still boot to a previous (known to be working) version.
    – guido
    Feb 9, 2015 at 15:03

1 Answer 1


The highlighting (and colorization) indicates that the 2nd kernel-core package is "newer" than the first and will replace on upgrade.

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