docs: fix tips

README.md

@@ -13,3 +13,8 @@
 ```
 ssh -v -p 2222 root@localhost -i ./sandbox -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no
 ```
+
+### Exit QEMU
+
+To exit a qemu-system-x86_64, VM in nographics mode, `Ctrl+a` then `X`
+

cloud-init_method/README.md

@@ -1,7 +1,5 @@
 # Auto setup of debian vm with cloud image + cloudinit method
 
-First download cloud generic image
+First download cloud generic image with `init.sh`
 
-    wget https://cloud.debian.org/images/cloud/bookworm/latest/debian-12-generic-amd64.qcow2
-
-To run the VM
+Then `run.sh`

preseed_method/README.md

@@ -1,8 +1,8 @@
-# Debian vm auto setup
+# Debian vm auto setup with preseed
 
-Install a debian headless virtual-machine from scratch with netboot in a QEMU environment
+Install a debian headless virtual-machine from scratch with netboot in a QEMU environment.
 
-## requirements
+## Requirements
 
 - QEMU + KVM
 - tmux
@@ -23,14 +23,6 @@ then on a client, connect to ssh via the port forwarding (in user mode network)
 ssh -o StrictHostKeyChecking=no -p 42022 root@localhost
 ```
 
-## troubleshooting
-
-kill qemu: pkill -f qemu-system-x86_64
-
-## TODO
-
-- find a better way to kill qemu
-
 ## preseed file
 
 Change this line to add initial packages.