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Clean old centos kernels

Clean old centos kernels

There is a setting in /etc/yum.conf that does exactly that : installonly_limit=. The value of this setting is the number of older kernels that are kept when a new kernel is installed by yum. If the number of installed kernels becomes greater than this, the oldest one gets removed at the same time a new one is installed.

This cleaning can also be done manually with a command that belongs to the yum-utils package : package-cleanup –oldkernels –count=2