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-rw-r--r--docs/linux/setup_ubuntu-host_qemu-vm_x86-64-kernel.md2
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diff --git a/docs/linux/setup_ubuntu-host_qemu-vm_x86-64-kernel.md b/docs/linux/setup_ubuntu-host_qemu-vm_x86-64-kernel.md
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--- a/docs/linux/setup_ubuntu-host_qemu-vm_x86-64-kernel.md
+++ b/docs/linux/setup_ubuntu-host_qemu-vm_x86-64-kernel.md
@@ -2,6 +2,8 @@
These are the instructions on how to fuzz the x86-64 kernel in a QEMU with Ubuntu on the host machine and Debian Stretch in the QEMU instances.
+In the instructions below, the `$VAR` notation (e.g. `$GCC`, `$KERNEL`, etc.) is used to denote paths to directories that are either created when executing the instructions (e.g. when unpacking GCC archive, a directory will be created), or that you have to create yourself before running the instructions. Substitute the values for those variables manually.
+
## GCC
While you may use GCC that is available from your distro, it's preferable to get the lastest GCC from [this](/docs/syzbot.md#crash-does-not-reproduce) list. Download and unpack into `$GCC`, and you should have GCC binaries in `$GCC/bin/`