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Updating the Kernel - Best practice?

Discussion in 'Security' started by santrix, Mar 5, 2010.

  1. santrix

    santrix Well-Known Member

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    Hi,

    >uname -r
    gives
    2.6.18-92.1.18.el5

    >yum list kernel
    gives
    kernel.i686 2.6.18-92.el5 installed
    kernel.i686 2.6.18-92.1.18.el5 installed
    Available Packages
    kernel.i686 2.6.18-164.11.1.el5 updates

    I take it that
    >yum update kernel

    will just update 2.6.18 to the latest 164 revision?

    Is this safe to do? Is it necessary?

    I assume there is no way to upgrade the kernel to a later version (2.6.33 for example) without rebuilding the box?

    Where can I find the best source of info on the vulnerabilities to various kernel versions, so i can stop asking lame questions?

    Thanks

    Steve
     
  2. hicom

    hicom Well-Known Member

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    Just do:

    yum upgrade kernel or yum upgrade kernel-PAE or yum upgrade kernel-SMP

    depending on what type of kernel you have installed on the system.

    Also, just found out an issue on CentOS 5.4 with ext3 file system. If you have a device that you mount/unmount every night. The system will attempt to fsck that partition upon reboot!! This may cause your system to take a long long time to come back up.
     
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