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Summary
The idea of upgrading and recompiling the Linux kernel strikes fear into many. While the steps are labor-intensive, there is nothing difficult about this process.
The easiest way to upgrade a kernel is to install a newer Red Hat Linux kernel RPM package. When installed and not upgraded, a new kernel automatically upgrades the bootloader as well. Alternatively, if the upgrade is small, you can download and install a patch.
If you want to change the configuration of a kernel, the process is long. Here’s a summary of the basic steps:
Download the source code for the new kernel: tarballs from Internet sites such as
Create an Initial RAM disk for your new kernel with the mkinitrd/boot/initrd-xExtraVersion command.
Modify your bootloader: add a stanza with the new kernel and Initial RAM disk files.
In the next chapter, we’ll pick up with other administrative functions. Job managers such as cron and at allow administrators to run programs on an automated basis. Other key administrative skills include log file analysis and service management.
