Update cheatsheets

linux/genkernel

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# genkernel
+
+> Gentoo Linux utility to compile and install kernels.
+> More information: <https://wiki.gentoo.org/wiki/Genkernel>.
+
+- Automatically compile and install a generic kernel:
+
+`sudo genkernel all`
+
+- Build and install the bzImage|initramfs|kernel|ramdisk only:
+
+`sudo genkernel {{bzImage|initramfs|kernel|ramdisk}}`
+
+- Apply changes to the kernel configuration before compiling and installing:
+
+`sudo genkernel --menuconfig all`
+
+- Generate a kernel with a custom name:
+
+`sudo genkernel --kernname={{custom_name}} all`
+
+- Use a kernel source outside the default directory `/usr/src/linux`:
+
+`sudo genkernel --kerneldir={{path/to/directory}} all`