>>494

Fedora使いだがお教えしよう。

/etc/yum.confの中だよ。

http://wiki.centos.org/Manuals/ReleaseNotes/CentOS5.2/

The former installonlyn yum plugin is now built into yum.
You must add the variable installonly_limit = # (where # is
the number of kernels you want to maintain installed
when a new kernel is installed) to your yum.conf file in CentOS 5.2.
The default if nothing is added is 3 kernels.
This will need to be updated even if you have the current
plugin turned off or set to a different number as
it does not happen automatically.

なんかこのページの日本語のほうには解説ないね。
fedoraはあったんだけど。