Okay, so back to our discussion: we have now booted into our newly built kernel. But hang on, let's not blindly assume things, let's actually verify that all has gone according to plan. The empirical approach is always best:
$ uname -r
5.4.0-llkd01
Indeed, we are now running Ubuntu 18.04.3 LTS on our just-built 5.4.0 Linux kernel!
Recall our table of kernel configs to edit from Chapter 2, Building the 5.x Linux Kernel from Source – Part 1, in Table 2.4. We should check row by row that each configuration we have changed has actually taken effect. Let's list some of them, starting with the concerned CONFIG_'FOO' name, as follows:
- CONFIG_LOCALVERSION: The preceding output of uname -r clearly shows the localversion (or -EXTRAVERSION) part of the kernel version has been set to what we wanted: the -llkd01 string.
- CONFIG_IKCONFIG: Allows us to see the current kernel configuration details...
